JP2015017039A - Complex compound and optical recording medium containing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a complex compound used for an optical recording medium having excellent recording/reproduction properties or the like.SOLUTION: There is provided a complex compound which is composed of a compound represented by the formula (I), a metal and one selected from the group consisting of an ion formed by addition of one or more protons to an amine, an ammonium ion and a quaternary ammonium ion. (where, R, R, Rand Rrepresent a hydrogen atom, an amino group which may have a substituent, an alkoxyl group which may have a substituent or the like; Rrepresents a hydrogen atom. an alkyl group which may have a substituent or the like; and a ring A is selected from the group consisting of a tetrazole ring, a benzothiazole ring, a benzoxazole ring or the like.

Description

  The present invention relates to a complex compound used for an optical recording medium and the like.

In recent years, development of an optical recording medium that enables ultra-high density recording using a technique for increasing the numerical aperture NA of the objective lens, a technique for reducing the laser wavelength λ, and the like has been progressing. For example, in order to record video information of HDTV (high definition television) for 2 hours or more, an optical recording medium having the same size as a DVD and a capacity of at least 23 GB is required. In order to meet these demands, a blue-violet laser beam is used, the NA of the objective lens is set to 0.85, and the laser spot diameter is reduced, so that an optical recording medium for recording higher density information, so-called Blu. -Ray Disc (BD) has been developed.
For example, Patent Document 1 discloses an optical recording medium containing a hydrazine compound, a metal complex compound composed of a metal atom and an amine. However, an optical recording medium having further excellent recording / reproducing characteristics is demanded.

JP 2011-126815 A

  An object of the present invention is to provide a complex compound or the like used for an optical recording medium having excellent recording / reproducing characteristics.

［式中、Ｒ^１、Ｒ^２、Ｒ^３およびＲ^４は、同一または異なっていてもよい、水素原子、ヒドロキシル基、ハロゲン原子、ニトロ基、シアノ基、置換基を有していてもよいアミノ基、置換基を有していてもよいアルキル基、置換基を有していてもよいアルコキシル基、置換基を有していてもよいアラルキル基、置換基を有していてもよいアリール基、置換基を有していてもよい脂環式炭化水素基または置換基を有していてもよい複素環基を表し、Ｒ^５は水素原子、置換基を有していてもよいアルキル基、置換基を有していてもよいアルケニル基、置換基を有していてもよいアラルキル基、置換基を有していてもよいアリール基、置換基を有していてもよい脂環式炭化水素基または置換基を有していてもよい複素環基を表し、環Ａは置換基を有していてもよい複素環を表し、該複素環は、ピリミジン環、テトラゾール環、トリアゾール環、イミダゾール環、ベンゾイミダゾール環、チアゾール環、ベンゾチアゾール環、オキサゾール環、ベンゾオキサゾール環、ピリジン環、ピリダジン環、フタラジン環およびキナゾリン環からなる群より選ばれる]で表される化合物と、金属と、アミンに１つ以上のプロトンが付加することにより生じるイオン、アンモニウムイオンおよび第４級アンモニウムイオンからなる群から選ばれる１種と、からなる錯化合物。
［２］Ｒ^５が水素原子、置換基を有していてもよいアルキル基、置換基を有していてもよいアルケニル基または置換基を有していてもよいアリール基である［１］に記載の錯化合物。
［３］環Ａが置換基を有していてもよいテトラゾール環、置換基を有していてもよいベンゾチアゾール環または置換基を有していてもよいベンゾオキサゾール環である［１］または［２］に記載の錯化合物。
［４］金属がコバルト、ロジウム、イリジウム、アルミニウム、ガリウムまたは鉄である［１］〜［３］のいずれかに記載の錯化合物。
［５］金属がコバルトである［１］〜［３］のいずれかに記載の錯化合物。
［６］アミンに１つ以上のプロトンが付加することにより生じるイオン、アンモニウムイオンおよび第４級アンモニウムイオンからなる群から選ばれる１種が、アミンに１つ以上のプロトンが付加することにより生じるイオンである［１］〜［５］のいずれかに記載の錯化合物。
［７］アミンが置換基を有していてもよい脂肪族第３アミンである［６］に記載の錯化合物。
［８］アミンに１つ以上のプロトンが付加することにより生じるイオン、アンモニウムイオンおよび第４級アンモニウムイオンからなる群から選ばれる１種が、第４級アンモニウムイオンである［１］〜［５］のいずれかに記載の錯化合物。
［９］［１］〜［８］のいずれかに記載の錯化合物を含有する光記録媒体。 The present invention provides the following [1] to [9].
[1] Formula (I)

[Wherein R ¹ , R ² , R ³ and R ⁴ may be the same or different, and may be a hydrogen atom, a hydroxyl group, a halogen atom, a nitro group, a cyano group or an amino group which may have a substituent. A group, an alkyl group which may have a substituent, an alkoxyl group which may have a substituent, an aralkyl group which may have a substituent, an aryl group which may have a substituent, Represents an alicyclic hydrocarbon group which may have a substituent or a heterocyclic group which may have a substituent, and R ⁵ represents a hydrogen atom, an alkyl group which may have a substituent, a substituted group. An alkenyl group which may have a group, an aralkyl group which may have a substituent, an aryl group which may have a substituent, an alicyclic hydrocarbon group which may have a substituent Or represents a heterocyclic group which may have a substituent, and ring A represents a substituent. Represents a heterocyclic ring which may have, and the heterocyclic ring is a pyrimidine ring, tetrazole ring, triazole ring, imidazole ring, benzimidazole ring, thiazole ring, benzothiazole ring, oxazole ring, benzoxazole ring, pyridine ring, pyridazine Selected from the group consisting of a ring, a phthalazine ring and a quinazoline ring], a group consisting of a metal, an ion produced by adding one or more protons to an amine, an ammonium ion and a quaternary ammonium ion A complex compound comprising one selected from
[2] In [1], R ⁵ is a hydrogen atom, an alkyl group which may have a substituent, an alkenyl group which may have a substituent, or an aryl group which may have a substituent. The complex compound described.
[3] Ring A is a tetrazole ring which may have a substituent, a benzothiazole ring which may have a substituent, or a benzoxazole ring which may have a substituent [1] or [ 2].
[4] The complex compound according to any one of [1] to [3], wherein the metal is cobalt, rhodium, iridium, aluminum, gallium, or iron.
[5] The complex compound according to any one of [1] to [3], wherein the metal is cobalt.
[6] Ion generated by addition of one or more protons to an amine, one selected from the group consisting of an ion formed by adding one or more protons to an amine, an ammonium ion, and a quaternary ammonium ion The complex compound according to any one of [1] to [5].
[7] The complex compound according to [6], wherein the amine is an aliphatic tertiary amine which may have a substituent.
[8] One kind selected from the group consisting of an ion generated by adding one or more protons to an amine, an ammonium ion, and a quaternary ammonium ion is a quaternary ammonium ion [1] to [5]. The complex compound in any one of.
[9] An optical recording medium containing the complex compound according to any one of [1] to [8].

  According to the present invention, it is possible to provide a complex compound used for an optical recording medium having excellent recording / reproducing characteristics.

［式中、Ｒ^１、Ｒ^２、Ｒ^３およびＲ^４は、同一または異なっていてもよい、水素原子、ヒドロキシル基、ハロゲン原子、ニトロ基、シアノ基、置換基を有していてもよいアミノ基、置換基を有していてもよいアルキル基、置換基を有していてもよいアルコキシル基、置換基を有していてもよいアラルキル基、置換基を有していてもよいアリール基、置換基を有していてもよい脂環式炭化水素基または置換基を有していてもよい複素環基を表し、Ｒ^５は水素原子、置換基を有していてもよいアルキル基、置換基を有していてもよいアルケニル基、置換基を有していてもよいアラルキル基、置換基を有していてもよいアリール基、置換基を有していてもよい脂環式炭化水素基または置換基を有していてもよい複素環基を表し、環Ａは置換基を有していてもよい複素環を表し、該複素環は、ピリミジン環、テトラゾール環、トリアゾール環、イミダゾール環、ベンゾイミダゾール環、チアゾール環、ベンゾチアゾール環、オキサゾール環、ベンゾオキサゾール環、ピリジン環、ピリダジン環、フタラジン環およびキナゾリン環からなる群より選ばれる。] (Complex compound)
The complex compound of the present invention is selected from the group consisting of a compound represented by the following formula (I), a metal, an ion generated by adding one or more protons to an amine, an ammonium ion, and a quaternary ammonium ion. It consists of one kind.

[Wherein R ¹ , R ² , R ³ and R ⁴ may be the same or different, and may be a hydrogen atom, a hydroxyl group, a halogen atom, a nitro group, a cyano group or an amino group which may have a substituent. A group, an alkyl group which may have a substituent, an alkoxyl group which may have a substituent, an aralkyl group which may have a substituent, an aryl group which may have a substituent, Represents an alicyclic hydrocarbon group which may have a substituent or a heterocyclic group which may have a substituent, and R ⁵ represents a hydrogen atom, an alkyl group which may have a substituent, a substituted group. An alkenyl group which may have a group, an aralkyl group which may have a substituent, an aryl group which may have a substituent, an alicyclic hydrocarbon group which may have a substituent Or represents a heterocyclic group which may have a substituent, and ring A represents a substituent. Represents a heterocyclic ring which may have, and the heterocyclic ring is a pyrimidine ring, tetrazole ring, triazole ring, imidazole ring, benzimidazole ring, thiazole ring, benzothiazole ring, oxazole ring, benzoxazole ring, pyridine ring, pyridazine It is selected from the group consisting of a ring, a phthalazine ring and a quinazoline ring. ]

<Compound represented by formula (I)>
Hereinafter, the compound represented by the above formula (I) is referred to as compound (I). The same applies to the compounds of other formula numbers.
In the definition of each group of the formula (I), examples of the alkyl group and the alkyl moiety of the alkoxyl group include a linear or branched alkyl group having 1 to 20 carbon atoms, specifically, a methyl group, Ethyl group, propyl group, isopropyl group, butyl group, isobutyl group, sec-butyl group, tert-butyl group, pentyl group, isopentyl group, 1-methylbutyl group, 2-methylbutyl group, tert-pentyl group, hexyl group, heptyl Group, 1-isopropyl-2-methylpropyl group, octyl group, nonyl group, decyl group, eicosyl group and the like. Among them, those having 1 to 10 carbon atoms are preferable.
Examples of the alkenyl group include linear or branched alkenyl groups having 2 to 20 carbon atoms. Specific examples include a vinyl group, an allyl group, an isopropenyl group, a butenyl group, an isobutenyl group, a pentenyl group, 1 -Methyl-2-butenyl group, 1-ethyl-2-propenyl group, hexenyl group, heptenyl group, octenyl group, nonenyl group, decenyl group, eicocenyl group, etc., among which those having 2 to 10 carbon atoms Is preferred.
Examples of the aralkyl group include an aralkyl group having 7 to 15 carbon atoms, and specific examples include a benzyl group, a phenethyl group, a phenylpropyl group, and a naphthylmethyl group.
As an aryl group, a C6-C14 aryl group is mentioned, for example, A phenyl group, a naphthyl group, an anthryl group, an azulenyl group etc. are mentioned specifically ,.

Examples of the alicyclic hydrocarbon in the alicyclic hydrocarbon group include, for example, a cycloalkane having 3 to 8 carbon atoms, a cycloalkene having 3 to 8 carbon atoms, and a bicyclic or tricyclic condensed 3- to 8-membered ring. And alicyclic hydrocarbons.
Specific examples of the C3-C8 cycloalkane include cyclopropane, cyclobutane, cyclopentane, cyclohexane, cycloheptane, and cyclooctane.
Specific examples of the C3-C8 cycloalkene include cyclopropene, cyclobutene, cyclopentene, cyclohexene, cycloheptene, and cyclooctene.
Specific examples of the bicyclic or tricyclic alicyclic hydrocarbon condensed with a 3- to 8-membered ring include dihydropentalene, dihydroindene, tetrahydronaphthalene, hexahydrofluorene and the like.

Examples of the heterocyclic ring in the heterocyclic group include an aromatic heterocyclic ring and an alicyclic heterocyclic ring.
As the aromatic heterocycle, for example, a 5-membered or 6-membered monocyclic aromatic heterocycle containing at least one atom selected from a nitrogen atom, an oxygen atom and a sulfur atom, and a 3- to 8-membered ring are condensed. Examples include bicyclic or tricyclic condensed aromatic heterocycles containing at least one atom selected from a nitrogen atom, an oxygen atom, and a sulfur atom. Specific examples include a pyridine ring, a pyrazine ring, and a pyrimidine ring. , Pyridazine ring, quinoline ring, isoquinoline ring, phthalazine ring, quinazoline ring, quinoxaline ring, naphthyridine ring, cinnoline ring, pyrrole ring, pyrazole ring, imidazole ring, triazole ring, triazine ring, tetrazole ring, thiophene ring, furan ring, thiazole Ring, oxazole ring, isoxazole ring, indole ring, isoindole ring, indazole ring, benzimidazole Lumpur ring, benzothiophene ring, benzotriazole ring, benzothiazole ring, benzoxazole ring, purine ring, carbazole ring, acridine ring, phenazine ring, phenothiazine ring, a phenoxazine ring, a phenanthroline ring, and the like.

As the alicyclic heterocycle, for example, a 5- to 8-membered monocyclic alicyclic heterocycle containing at least one atom selected from a nitrogen atom, an oxygen atom and a sulfur atom, and a 3- to 8-membered ring are condensed. A bicyclic or tricyclic condensed alicyclic heterocyclic ring containing at least one atom selected from a nitrogen atom, an oxygen atom and a sulfur atom, specifically, a pyrrolidine ring, a piperidine ring, Piperazine ring, morpholine ring, thiomorpholine ring, homopiperidine ring, homopiperazine ring, tetrahydropyridine ring, tetrahydroquinoline ring, tetrahydroisoquinoline ring, tetrahydrofuran ring, tetrahydropyran ring, dihydrobenzofuran ring, indoline ring, tetrahydrocarbazole ring, 1, And 8-diazabicyclo [5.4.0] undec-7-ene ring.
Examples of the halogen atom include a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom.

  Examples of the substituent of the amino group include one or two alkyl groups. Here, the alkyl group has the same meaning as described above. When the amino group has two alkyl groups as substituents, the two alkyl groups may be the same or different.

Examples of the substituent of the alkyl group and the alkoxyl group include 1 to 5 substituents which may be the same or different, specifically, a hydroxyl group, a halogen atom, a nitro group, a cyano group, a carbamoyl group, a substituent. An amino group, alkoxyl group, alkoxyalkoxyl group, alkanoyl group, alkylcarbonyloxy group, alkoxycarbonyl group, aroyl group, aryloxy group, arylcarbonyloxy group, aryloxycarbonyl group, heterocyclic group, etc. Is mentioned.
Here, the halogen atom, the amino group which may have a substituent, the alkoxyl group, and the heterocyclic group are as defined above. The alkyl portions of the alkanoyl group, alkylcarbonyloxy group and alkoxycarbonyl group are as defined above. The two alkoxy moieties of the alkoxyalkoxyl group have the same meaning as the above alkoxyl group, respectively. The aryl part of the aroyl group, aryloxy group, arylcarbonyloxy group and aryloxycarbonyl group has the same meaning as the above aryl group.

Examples of the substituent of the aralkyl group, aryl group and alicyclic hydrocarbon group include 1 to 5 substituents which may be the same or different, specifically, a hydroxyl group, a halogen atom, a nitro group, cyano Group, carbamoyl group, optionally substituted amino group, optionally substituted alkyl group, optionally substituted alkoxyl group, alkenyl group, aralkyl group, alkanoyl group, Examples thereof include an alkylcarbonyloxy group, an alkoxycarbonyl group, an aryl group, an aroyl group, an aryloxy group, an arylcarbonyloxy group, an aryloxycarbonyl group, an alicyclic hydrocarbon group, and a heterocyclic group.
Here, a halogen atom, an amino group which may have a substituent, an alkyl group which may have a substituent, an alkoxyl group which may have a substituent, an alkenyl group, an aralkyl group, an alkanoyl group , Alkylcarbonyloxy group, alkoxycarbonyl group, aryl group, aroyl group, aryloxy group, arylcarbonyloxy group, aryloxycarbonyl group, alicyclic hydrocarbon group and heterocyclic group are as defined above.

  Examples of the substituent for the alkenyl group include the groups listed above as the substituent for the alkyl group, and an aryl group which may have a substituent. Here, the aryl group which may have a substituent is as defined above.

As the substituent of the heterocyclic group, for example, 1 to 5 substituents which may be the same or different, specifically, a hydroxyl group, an oxo group, a halogen atom, a nitro group, a cyano group, a carbamoyl group, a substituent An amino group which may have a group, an alkyl group which may have a substituent, an alkenyl group which may have a substituent, an alkoxyl group which may have a substituent, an aralkyl group, Examples include an alkanoyl group, an alkylcarbonyloxy group, an alkoxycarbonyl group, an aryl group which may have a substituent, an aroyl group, an aryloxy group, an arylcarbonyloxy group, an aryloxycarbonyl group, and a heterocyclic group.
Here, a halogen atom, an amino group which may have a substituent, an alkyl group which may have a substituent, an alkenyl group which may have a substituent, or a substituent. Alkoxyl group, aralkyl group, alkanoyl group, alkylcarbonyloxy group, alkoxycarbonyl group, optionally substituted aryl group, aroyl group, aryloxy group, arylcarbonyloxy group, aryloxycarbonyl group and heterocyclic group Are as defined above.

Examples of the substituent of the heterocyclic ring represented by ring A include 1 to 5 substituents which may be the same or different, specifically, hydroxyl group, oxo group, halogen atom, nitro group, cyano group, carbamoyl. A group, an amino group which may have a substituent, an alkyl group which may have a substituent, an alkenyl group which may have a substituent, an alkoxyl group which may have a substituent, An aralkyl group which may have a substituent, an alkanoyl group which may have a substituent, an aryl group which may have a substituent, an aroyl group which may have a substituent, a substituent And an alicyclic hydrocarbon group which may have a heterocyclic group and a heterocyclic group which may have a substituent.
Here, a halogen atom, an amino group which may have a substituent, an alkyl group which may have a substituent, an alkenyl group which may have a substituent, or a substituent. A good alkoxyl group, an aralkyl group which may have a substituent, an alkanoyl group, an aryl group which may have a substituent, an aroyl group, an alicyclic hydrocarbon group which may have a substituent, and The heterocyclic group which may have a substituent is as defined above. Examples of the substituent of the alkanoyl group include the groups listed above as the substituent of the alkyl group. Examples of the substituent for the aroyl group include the groups listed above as the substituent for the aralkyl group.

As a substituent of the tetrazole ring, one or two substituents which may be the same or different, specifically, a carbamoyl group, an alkyl group which may have a substituent, or a substituent. May have an alkenyl group which may have a substituent, an aralkyl group which may have a substituent, an alkanoyl group which may have a substituent, an aryl group which may have a substituent, and may have a substituent Examples include an aroyl group, an alicyclic hydrocarbon group which may have a substituent, and a heterocyclic group which may have a substituent.
Here, an alkyl group which may have a substituent, an alkenyl group which may have a substituent, an aralkyl group which may have a substituent, an alkanoyl group which may have a substituent An aryl group which may have a substituent, an aroyl group which may have a substituent, an alicyclic hydrocarbon group which may have a substituent, and a substituent. The heterocyclic group has the same meaning as described above.
Specific examples of the group represented by ring A when ring A is a tetrazole ring include a 5-tetrazolyl group which may have a substituent. Here, examples of the substituent of the 5-tetrazolyl group include the groups listed above as the substituent of the tetrazole ring.

The substituent of the benzoxazole ring has 1 to 5 substituents that may be the same or different, specifically, a hydroxyl group, a halogen atom, a nitro group, a cyano group, a carbamoyl group, and a substituent. An amino group that may have a substituent, an alkyl group that may have a substituent, an alkenyl group that may have a substituent, an alkoxyl group that may have a substituent, or a substituent. A good aralkyl group, an alkanoyl group which may have a substituent, an aryl group which may have a substituent, an aroyl group which may have a substituent, a fat which may have a substituent Examples thereof include a cyclic hydrocarbon group and a heterocyclic group which may have a substituent.
Here, a halogen atom, an amino group which may have a substituent, an alkyl group which may have a substituent, an alkenyl group which may have a substituent, or a substituent. A good alkoxyl group, an aralkyl group which may have a substituent, an alkanoyl group which may have a substituent, an aryl group which may have a substituent, an aroyl which may have a substituent The group, the alicyclic hydrocarbon group which may have a substituent, and the heterocyclic group which may have a substituent have the same meanings as described above.
Specific examples of the group represented by ring A when ring A is a benzoxazole ring include an optionally substituted 2-benzoxazolyl group. Here, as a substituent of 2-benzoxazolyl group, the group mentioned above as a substituent of a benzoxazole ring, etc. are mentioned, for example.

Examples of the substituent on the benzothiazole ring include 1 to 5 substituents which may be the same or different, and specific examples include the groups listed above as the substituent on the benzoxazole ring.
Specific examples of the group represented by ring A when ring A is a benzothiazole ring include a 2-benzothiazolyl group which may have a substituent. Here, examples of the substituent for the 2-benzothiazolyl group include the groups listed above as the substituent for the benzothiazole ring.

In each group of compound (I),
R ¹ , R ³ and R ⁴ are preferably hydrogen atoms.
R ² is preferably an amino group which may have a substituent or an alkoxyl group which may have a substituent, and more preferably an alkoxyl group which may have a substituent.
R ⁵ is preferably a hydrogen atom, an alkyl group which may have a substituent, an alkenyl group which may have a substituent or an aryl group which may have a substituent, a hydrogen atom or a substituent An alkyl group which may have a group is more preferable, and a hydrogen atom is particularly preferable.
Ring A is preferably a tetrazole ring which may have a substituent, a benzothiazole ring which may have a substituent or a benzoxazole ring which may have a substituent, and has a substituent. A tetrazole ring which may have a substituent or a benzoxazole ring which may have a substituent is more preferable, and a tetrazole ring which has an aryl group which may have a substituent as a substituent is particularly preferable.
The compound (I) is preferably a compound in which the above-mentioned preferred R ¹ , R ² , R ³ , R ⁴ , R ⁵ and ring A are combined.

<Metal>
Examples of the metal include cobalt, rhodium, iridium, aluminum, gallium, iron and the like, and among these, cobalt is preferable.

<One kind selected from the group consisting of ions generated by adding one or more protons to amines, ammonium ions and quaternary ammonium ions>
As one type selected from the group consisting of an ion generated by adding one or more protons to an amine, an ammonium ion and a quaternary ammonium ion, an ion generated by adding one or more protons to an amine, or Quaternary ammonium ions are preferred, and quaternary ammonium ions are more preferred.

As an amine in an ion generated by adding one or more protons to an amine (hereinafter referred to as an amine cation), an amine having one basic nitrogen atom (monoamine) or a basic nitrogen atom is used. Those having two or more (polyamine) can be used.
Specific examples of amines include, for example, aliphatic primary amines that may have a substituent and those having 1 to 30 carbon atoms (for example, butylamine, ethanolamine, ethylenediamine, etc.), and have a substituent. Aliphatic secondary amines having 2 to 30 carbon atoms (for example, dibutylamine, diisobutylamine, diethanolamine, etc.), aliphatic tertiary amines optionally having substituents having 3 to 30 carbon atoms (For example, triethylamine, triethanolamine, diisopropylethylamine, etc.), an alicyclic amine having 3 to 30 carbon atoms which may have a substituent, an aromatic amine which may have a substituent, a substituent Basic nitrogen-containing heterocyclic compounds that may have (for example, pyridine, quinoline, indole, benzothiazole, bipyridine, phenanthroline, , 8-diazabicyclo [5.4.0] undec-7-ene, etc.), amines containing silicon (for example, heptamethyldisilazane and the like) and the like. Among these, an aliphatic tertiary amine which may have a substituent is preferable.

  Examples of the alicyclic amine include a 3- to 8-membered monocyclic alicyclic hydrocarbon ring, and may have an aliphatic chain on a basic nitrogen atom, or a basic nitrogen atom. And an amine which may have an aliphatic chain between the monocyclic alicyclic hydrocarbon ring and the like. Here, examples of the aliphatic chain that may be present on the basic nitrogen atom include the groups listed above as the alkyl group. Examples of the aliphatic chain that may be present between the basic nitrogen atom and the monocyclic alicyclic hydrocarbon ring include, for example, 1 hydrogen atom on carbon from the groups listed above as an alkyl group. The alkylene group etc. which arise by removing are illustrated. Specific examples of the alicyclic amine include cyclohexylamine, (cyclohexylmethyl) amine and the like.

  Examples of the aromatic amine include an aromatic hydrocarbon ring such as a benzene ring and a naphthalene ring, and may have an aliphatic chain on a basic nitrogen atom. And an amine which may have an aliphatic chain between the aromatic hydrocarbon ring. Here, the aliphatic chain which may be present on the basic nitrogen atom is as defined above. Examples of the aliphatic chain that may be present between the basic nitrogen atom and the aromatic hydrocarbon ring include, for example, between the basic nitrogen atom and the monocyclic alicyclic hydrocarbon ring. Examples of the aliphatic chain that may be included include the groups listed above. Specific examples of the aromatic amine include aniline, naphthylamine, benzylamine, tribenzylamine and the like.

  Examples of the substituent of the aliphatic primary amine, aliphatic secondary amine, and aliphatic tertiary amine include, for example, the same or different substituents having 1 to 5 substituents, specifically, hydroxyl group, halogen Atom, nitro group, cyano group, carbamoyl group, alkoxyl group, alkoxyalkoxyl group, alkanoyl group, alkylcarbonyloxy group, alkoxycarbonyl group and the like can be mentioned. Here, the halogen atom, the alkoxyl group, the alkoxyalkoxyl group, the alkanoyl group, the alkylcarbonyloxy group and the alkoxycarbonyl group are respectively as defined above.

  Among the substituents of alicyclic amine and aromatic amine, examples of the substituent in the ring in alicyclic amine and ring in aromatic amine include, for example, aliphatic primary amine, aliphatic secondary amine, and aliphatic tertiary amine. Examples of the substituent of the amine include the groups listed above and an alkyl group which may have a substituent. Here, the alkyl group which may have a substituent is as defined above. Examples of the substituent of the aliphatic chain when the alicyclic amine and the aromatic amine have an aliphatic chain include, for example, the above-mentioned substituents of the aliphatic primary amine, aliphatic secondary amine, and aliphatic tertiary amine. And the like.

  Examples of the substituent of the basic nitrogen-containing heterocyclic compound include 1 to 5 substituents which may be the same or different, specifically, a hydroxyl group, an oxo group, a halogen atom, a nitro group, and a cyano group. , A carbamoyl group, an optionally substituted alkyl group, an optionally substituted alkenyl group, an optionally substituted alkoxyl group, an aralkyl group, an alkanoyl group, an alkylcarbonyloxy group , An alkoxycarbonyl group, an aryl group optionally having a substituent, an aroyl group, an aryloxy group, an arylcarbonyloxy group, an aryloxycarbonyl group, and the like. Here, a halogen atom, an alkyl group which may have a substituent, an alkenyl group which may have a substituent, an alkoxyl group which may have a substituent, an aralkyl group, an alkanoyl group, an alkylcarbonyl The oxy group, alkoxycarbonyl group, optionally substituted aryl group, aroyl group, aryloxy group, arylcarbonyloxy group and aryloxycarbonyl group have the same meanings as described above.

(式中、Ｌ^１は、水素原子、ヒドロキシル基、ハロゲン原子、置換基を有していてもよいアルキル基、置換基を有していてもよいアルケニル基、置換基を有していてもよいアルコキシル基、置換基を有していてもよいアラルキル基、置換基を有していてもよいアリール基、置換基を有していてもよいアリールオキシ基、置換基を有していてもよいアミノ基または置換基を有していてもよいアロイル基を表し、１０個のＬ^１は、それぞれ同一または異なっていてもよく、隣接する炭素原子上の２つのＬ^１とそれらが隣接するＣ＝Ｃとが一緒になって置換基を有していてもよいベンゼン環を形成してもよい)で表されるイオン、式（Ｖ）

(式中、ｒは、１〜６の整数を表し、Ｌ^２およびＬ^３は、同一または異なっていてもよい、水素原子、ヒドロキシル基、ハロゲン原子、置換基を有していてもよいアルキル基、置換基を有していてもよいアルケニル基、置換基を有していてもよいアルコキシル基、置換基を有していてもよいアラルキル基、置換基を有していてもよいアリール基、置換基を有していてもよいアリールオキシ基、置換基を有していてもよいアミノ基または置換基を有していてもよいアロイル基を表し、６つのＬ^２および２つのＬ^３は、それぞれ同一または異なっていてもよく、隣接する炭素原子上の２つのＬ^２とそれらが隣接するＣ＝Ｃとが一緒になって置換基を有していてもよいベンゼン環を形成してもよく、隣接する炭素原子上の１つのＬ^２と１つのＬ^３とそれらが隣接するＣ＝Ｃとが一緒になって置換基を有していてもよいベンゼン環を形成してもよく、２つのＬ^３とそれらが隣接するＣ＝Ｃ−Ｃ＝Ｃとが一緒になって置換基を有していてもよいベンゼン環を形成してもよい)で表されるイオン、式（Ｗ）

(式中、ｓは、１〜１０の整数を表し、Ｌ^４は、水素原子、ヒドロキシル基、ハロゲン原子、置換基を有していてもよいアルキル基、置換基を有していてもよいアルケニル基、置換基を有していてもよいアルコキシル基、置換基を有していてもよいアラルキル基、置換基を有していてもよいアリール基、置換基を有していてもよいアリールオキシ基、置換基を有していてもよいアミノ基または置換基を有していてもよいアロイル基を表す)で表されるイオン、式（Ｘ）

(式中、ｔは、１または２を表し、Ｌ^５は、水素原子、ヒドロキシル基、ハロゲン原子、置換基を有していてもよいアルキル基、置換基を有していてもよいアルケニル基、置換基を有していてもよいアルコキシル基、置換基を有していてもよいアラルキル基、置換基を有していてもよいアリール基、置換基を有していてもよいアリールオキシ基、置換基を有していてもよいアミノ基または置換基を有していてもよいアロイル基を表す)で表されるイオン、式（Ｙ）

(式中、Ｌ^６は、水素原子、ヒドロキシル基、ハロゲン原子、置換基を有していてもよいアルキル基、置換基を有していてもよいアルケニル基、置換基を有していてもよいアルコキシル基、置換基を有していてもよいアラルキル基、置換基を有していてもよいアリール基、置換基を有していてもよいアリールオキシ基、置換基を有していてもよいアミノ基または置換基を有していてもよいアロイル基を表す)で表されるイオン等が挙げられる。 As a quaternary ammonium ion, for example, the formula (U)

(In the formula, L ¹ may have a hydrogen atom, a hydroxyl group, a halogen atom, an alkyl group which may have a substituent, an alkenyl group which may have a substituent, or a substituent. An alkoxyl group, an aralkyl group which may have a substituent, an aryl group which may have a substituent, an aryloxy group which may have a substituent, an amino which may have a substituent Represents an aroyl group which may have a group or a substituent, 10 L ^{1 s} may be the same or different from each other, and two L ¹ on adjacent carbon atoms may be adjacent to C═C And may form a benzene ring which may have a substituent, together with an ion represented by the formula (V)

(In the formula, r represents an integer of 1 to 6, and L ² and L ³ may be the same or different, and may be a hydrogen atom, a hydroxyl group, a halogen atom, or an optionally substituted alkyl group. , An alkenyl group which may have a substituent, an alkoxyl group which may have a substituent, an aralkyl group which may have a substituent, an aryl group which may have a substituent, a substituent An aryloxy group which may have a group, an amino group which may have a substituent, or an aroyl group which may have a substituent, wherein six L ² and two L ³ are respectively They may be the same or different, and two L ² on adjacent carbon atoms may be combined with adjacent C═C to form an optionally substituted benzene ring, one L ² and one L on adjacent carbon atoms And they may form a benzene ring which may have a substituent and C = C of the adjacent together, the two L ³ and C = C-C = C to which they are adjacent An ion represented by the formula (W): which may form a benzene ring which may have a substituent together.

(In the formula, s represents an integer of 1 to 10, and L ⁴ represents a hydrogen atom, a hydroxyl group, a halogen atom, an alkyl group which may have a substituent, or an alkenyl which may have a substituent. Group, an alkoxyl group which may have a substituent, an aralkyl group which may have a substituent, an aryl group which may have a substituent, an aryloxy group which may have a substituent Represents an amino group optionally having substituent (s) or an aroyl group optionally having substituent (s)), an ion represented by formula (X)

(In the formula, t represents 1 or 2, and L ⁵ represents a hydrogen atom, a hydroxyl group, a halogen atom, an optionally substituted alkyl group, an optionally substituted alkenyl group, An alkoxyl group which may have a substituent, an aralkyl group which may have a substituent, an aryl group which may have a substituent, an aryloxy group which may have a substituent, a substituent An ion represented by an amino group which may have a group or an aroyl group which may have a substituent), a formula (Y)

(In the formula, L ⁶ may have a hydrogen atom, a hydroxyl group, a halogen atom, an alkyl group which may have a substituent, an alkenyl group which may have a substituent, or a substituent. An alkoxyl group, an aralkyl group which may have a substituent, an aryl group which may have a substituent, an aryloxy group which may have a substituent, an amino which may have a substituent And an ion represented by an aroyl group which may have a group or a substituent.

  Here, a halogen atom, an alkyl group which may have a substituent, an alkenyl group which may have a substituent, an alkoxyl group which may have a substituent, or a substituent. A good aralkyl group, an aryl group which may have a substituent, an aryloxy group, an amino group which may have a substituent and an aroyl group which may have a substituent have the same meanings as described above, respectively. is there. Examples of the substituent for the aryloxy group and the benzene ring include the groups listed above as the substituent for the aralkyl group.

In the formula (U), L ¹ may be the same or different, a hydrogen atom, a hydroxyl group, a halogen atom, an optionally substituted alkyl group, or an optionally substituted aryl group Is preferred.

In the formula (V), L ² is preferably a hydrogen atom, and L ³ represents a hydrogen atom or two L ³ and adjacent C═C—C═C are combined. It is preferable to form a benzene ring which may have a substituent, and r is preferably an integer of 2 to 4.

In the formula (W), L ⁴ is preferably a hydrogen atom, an alkyl group which may have a substituent, or an aryl group which may have a substituent, which may be the same or different, s is preferably an integer of 2 to 10.

In the formula (X), L ⁵ is preferably a hydrogen atom, an alkyl group which may have a substituent, or an aryl group which may have a substituent, which may be the same or different.

In the formula (Y), L ⁶ is preferably a hydrogen atom, an alkyl group which may have a substituent, or an aryl group which may have a substituent, which may be the same or different.

Specific examples of quaternary ammonium ions are shown below.

(式中、Ｒ^１、Ｒ^２、Ｒ^３、Ｒ^４、Ｒ^５および環Ａは、それぞれ前記と同義であり、Ｍは金属を表し、Ｑ^ｎ＋はアミンの陽イオン、アンモニウムイオンおよび第４級アンモニウムイオンからなる群から選ばれる１種を表し、ｎは１〜３の整数を表す)で表される化合物等が挙げられる。ここで、金属、アミンおよび第４級アンモニウムイオンは、それぞれ前記と同義である。ｎは１または２であるのが好ましい。 Examples of the complex compound composed of the compound (I), a metal, and one selected from the group consisting of an amine cation, an ammonium ion, and a quaternary ammonium ion include, for example, the formula (Z)

(Wherein R ¹ , R ² , R ³ , R ⁴ , R ⁵ and ring A are the same as defined above, M represents a metal, Q ^{n +} represents an amine cation, ammonium ion and quaternary. 1 type selected from the group consisting of ammonium ions, and n represents an integer of 1 to 3). Here, a metal, an amine, and a quaternary ammonium ion are respectively synonymous with the above. n is preferably 1 or 2.

（式中、Ｒ^１、Ｒ^２、Ｒ^３、Ｒ^４、Ｒ^５および環Ａは、それぞれ前記と同義である）に従って製造することができる。具体的には、化合物（ＩＩ）と化合物（ＩＩＩ）とを、溶媒中、１０℃〜１００℃で、０．１時間〜３０時間反応させて化合物（Ｉ）を製造することができる。
化合物（ＩＩ）の使用量は、化合物（ＩＩＩ）に対して０．５倍モル〜５倍モル量であるのが好ましい。 <Method for Producing Compound (I)>
Next, an example is given and demonstrated about the manufacturing method of compound (I).
Compound (I) is represented, for example, by reaction formula (1)

(Wherein R ¹ , R ² , R ³ , R ⁴ , R ⁵ and ring A are each as defined above). Specifically, compound (I) can be produced by reacting compound (II) and compound (III) in a solvent at 10 to 100 ° C. for 0.1 to 30 hours.
The amount of compound (II) used is preferably 0.5 to 5 times the molar amount of compound (III).

  Examples of the solvent include alcohol solvents such as methanol, ethanol, propanol, isopropyl alcohol, butanol and octanol, hydrocarbon solvents such as hexane, decane, tetradecane, toluene and xylene, diethyl ether, dibutyl ether, methoxybenzene and diphenyl ether. Ether solvents such as dichloromethane, dichloroethane, chloroform, chlorobenzene, dichlorobenzene and other halogen solvents, N, N-dimethylformamide, amide solvents such as N, N-dimethylacetamide, sulfur-containing solvents such as dimethyl sulfoxide, Examples include acetonitrile.

Among the compounds (II), R ⁵ has an alkyl group which may have a substituent, an alkenyl group which may have a substituent, an aralkyl group which may have a substituent, and a substituent. An aryl group that may be substituted, an alicyclic hydrocarbon group that may have a substituent, or a heterocyclic group that may have a substituent may be obtained as a commercial product or publicly known Methods such as “Bioorganic & Medicinal Chemistry Letters”, 2011, Vol. 21, No. 10, p. 2855-2859, “Bulletin of the Chemical Society of Japan”, 2005, Vol. 78, No. 2, p. 284-287, “Journal of the American Chemical Society”, 1985, Vol. 107, No. 8, p. It can be obtained by manufacturing according to the method described in 2571-2573.

Among compounds (II), those in which R ⁵ is a hydrogen atom can be obtained as a commercial product, or can be obtained by a known method, for example, “Tetrahedron”, 1993, Vol. 49, No. 19, p. 4015-4034, “Journal of Organic Chemistry”, 2010, Vol. 75, No. 13, p. It can be obtained by producing according to the method described in 4596-4599.

Compound (III) can be obtained as a commercial product, or can be obtained by a known method, for example, the Chemical Society of Japan, “Experimental Chemistry Course (Vol. 20)”, 4th edition, Maruzen Co., Ltd., 1991, p. 30-46, p. 112-185, p. 279-290, p. 338-342, The Chemical Society of Japan, “Experimental Chemistry Course (Vol. 13)”, 5th edition, Maruzen Co., Ltd., 1991, p. 374-416, The Chemical Society of Japan, “Experimental Chemistry Course (Vol. 14)”, 5th edition, Maruzen Co., Ltd., 2003, p. 289-320, edited by Buehler & Pearson, “Survey of Organic Synthesis (Vol. 1)”, Wiley-Interscience, 1970, p. 411-512, edited by Buehler & Pearson, “Survey of Organic Synthesis (Volume 2)”, Wiley-Interscience, 1977, p. 812-853, edited by Saul Patai, “The Chemistry of the amino group”, John Wiley & Sons, 1968, p. 277-347, “Journal of Organic Chemistry”, 1999, Vol. 64, p. It can be obtained by manufacturing according to the method described in 5644-5649.
After the reaction, if necessary, compound (I) may be purified by a method usually used in organic synthetic chemistry (for example, various chromatographic methods, recrystallization methods, distillation methods, etc.).

<Production method of complex compound>
Next, the method for producing the complex compound of the present invention will be described with examples.
The complex compound composed of compound (I), cobalt and an amine cation is, for example, compound (I), a cobalt salt or an organic cobalt compound, and an amine in a solvent in the presence of oxygen at 0 ° C. to It can manufacture by making it react at 120 degreeC for 0.5 hour-30 hours (henceforth this manufacturing method 1).

Examples of the cobalt salt include cobalt (II) acetate, cobalt (II) chloride, cobalt (II) bromide, cobalt (II) iodide, cobalt (II) fluoride, cobalt (III) fluoride, and cobalt carbonate. (II), cobalt cyanide (II), hydrates thereof and the like.
Examples of the organic cobalt compound include sodium tris (carbonate) cobalt (III), cobalt (II) acetylacetonate hydrate, cobalt (III) acetylacetonate and the like.

  The amine can be obtained as a commercial product, or can be obtained by a known method, for example, the Chemical Society of Japan, “Experimental Chemistry Course (Volume 20) Synthesis and Reaction of Organic Compounds II”, 1st Edition, Maruzen Co., Ltd., 1956. Year, p. 391-582, The Chemical Society of Japan, “New Experimental Chemistry Course (Vol. 14) Synthesis and Reaction of Organic Compounds III”, 2nd edition, Maruzen Co., Ltd., 1978, p. 1332-1399, edited by the Chemical Society of Japan, “New Experimental Chemistry Course (Volume 20) Organic Synthesis II”, 4th edition, Maruzen Co., Ltd., 1992, p. 299-313, edited by the Chemical Society of Japan, “New Experimental Chemistry Course (Vol. 14) Synthesis of Organic Compounds II”, 5th edition, Maruzen Co., Ltd., 2005, p. 351-377, edited by Buehler & Pearson, “Survey of Organic Synthesis (Volume 1)”, Wiley-Interscience, 1970, p. 411-512, edited by Buehler & Pearson, “Survey of Organic Synthesis (Volume 2)”, Wiley-Interscience, 1977, p. 391-459, edited by Saul Patai, “The Chemistry of the amino group”, John Wiley & Sons, 1968, p. 37-69, edited by Barton & Olis, “Comprehensive Organic Chemistry The Synthesis and Reactions of Organic Compounds (Volume 2)”, Pergamon Press, 1979. 1-181, edited by Katritzky & Rees, “Comprehensive Heterocyclic Chemistry”, Pergamon Press, 1984, p. It can obtain by manufacturing according to the method etc. of 525-528 grade | etc.,.

The amount of compound (I) used is preferably 0.3 to 4 times the molar amount of the cobalt atom in the cobalt salt or organic cobalt compound.
When an amine having m basic nitrogen atoms is used, the amount of the amine used is 0.3 / m to 20 / m times the molar amount of the cobalt atom in the cobalt salt or organic cobalt compound. Is preferred.

  Examples of the solvent include alcohol solvents such as methanol, ethanol, propanol, isopropyl alcohol, butanol and isobutanol, halogen solvents such as chloroform and dichloromethane, aromatic solvents such as benzene, toluene and xylene, tetrahydrofuran, methyl- Examples include ether solvents such as tert-butyl ether, ester solvents such as ethyl acetate, ketone solvents such as acetone and methyl ethyl ketone, acetonitrile, and mixed solvents thereof.

After the reaction, the complex compound obtained by a method usually used in organic synthetic chemistry (for example, various column chromatography methods, recrystallization methods, washing with a solvent, etc.) may be purified as necessary.
Compound (I) is prepared in the same manner as in Production Method 1 except that a metal salt other than cobalt or an organic metal compound other than cobalt is used instead of cobalt salt or organic cobalt compound. And a complex compound composed of a metal other than cobalt (for example, rhodium, iridium, aluminum, gallium, iron, etc.) and an amine cation (hereinafter, this method is referred to as Production Method 2).

  Examples of the metal salt or organometallic compound other than cobalt and the metal other than cobalt include, for example, rhodium salt, organic rhodium compound, iridium salt, organic iridium compound, aluminum salt, organoaluminum compound, gallium Salts, organic gallium compounds, iron salts, organic iron compounds, and the like.

Examples of the rhodium salt include rhodium acetate (II) dimer, rhodium (III) chloride, and hydrates thereof.
Examples of the organic rhodium compound include rhodium (III) acetylacetonate and rhodium (II) hexanonate.
Examples of iridium salts include iridium (III) chloride, iridium bromide (III), and hydrates thereof.
Examples of the organic iridium compound include iridium (III) acetylacetonate.
Examples of the aluminum salt include aluminum acetate (III), aluminum chloride (III), aluminum chloride (III) = tetrahydrofuran complex, aluminum bromide (III), aluminum iodide (III), aluminum hydroxide (III), These hydrates can be mentioned.
Examples of the organoaluminum compound include aluminum (III) tris (acetylacetonate), aluminum (III) tris (ethylacetoacetonate), aluminum (III) isopropoxide, aluminum (III) ethylacetoacetonate = diiso Examples include propoxide, aluminum (III) isopropoxide, aluminum sec-butoxide, and aluminum ethoxide.
Examples of the gallium salt include gallium chloride (III), gallium bromide (III), gallium iodide (III), and hydrates thereof.
Examples of the organic gallium compound include gallium (III) acetylacetonate.
Examples of the iron salt include iron chloride (II), iron chloride (III), iron fluoride (II), iron fluoride (III), iron bromide (II), iron bromide (III), iron acetate (II), hydrates thereof and the like.
Examples of the organic iron compound include iron (II) acetylacetonate, iron (III) acetylacetonate, iron (III) ethoxide, and the like.
Of the complex compounds of the present invention, a complex compound composed of Compound (I), cobalt and ammonium ions can be produced by operating in the same manner as in Production Method 1 except that ammonia is used instead of amine.
A complex compound composed of a compound (I), a metal other than cobalt, and an ammonium ion can be produced in the same manner as in Production Method 2, except that ammonia is used instead of amine.

  The complex compound composed of compound (I), metal and quaternary ammonium ion is, for example, a complex compound composed of compound (I), metal and cation of amine and the corresponding quaternary ammonium salt in a solvent. It can be produced by reacting at 0 to 120 ° C. for 0.5 to 30 hours. Here, the complex compound which consists of compound (I), a metal, and the cation of an amine can be obtained by manufacturing according to the manufacturing method 1 or 2.

Examples of the anion in the quaternary ammonium salt include fluoride ion, chloride ion, bromide ion, iodide ion, and acetate ion.
The quaternary ammonium salt is obtained as a commercial product, or a known method such as, for example, edited by Saul Patai, “The Chemistry of the amino group”, John Wiley & Sons, 1968, p. 161-199, edited by Katritzky & Rees, “Comprehensive Heterocyclic Chemistry”, Pergamon Press, 1984, p. 99-164 and p. 515-528, “Journal of Materials Chemistry”, 2006, Vol. 16, p. 345-347, “Journal of the American Chemical Society”, 2009, vol. 131, p. It can be obtained by producing according to the method described in 9931-9933.

  A complex compound comprising compound (I), a metal and an amine cation (wherein the amine in the cation of the amine has m basic nitrogen atoms), and an n-valent quaternary ammonium salt A quaternary ammonium ion contained in the n-valent quaternary ammonium salt used when producing a complex compound comprising the compound (I), a metal and an n-valent quaternary ammonium ion by reacting, and use The molar ratio of the compound (I) to the cation of the amine contained in the complex compound composed of the metal and the cation of amine is 0.3 m / n to 10 m / n (quaternary ammonium ion / amine cation). ) Is preferred.

Examples of the solvent include alcohol solvents such as methanol, ethanol, propanol, isopropyl alcohol, butanol and isobutanol, halogen solvents such as chloroform and dichloromethane, aromatic solvents such as benzene, toluene and xylene, tetrahydrofuran, methyl- Examples include ether solvents such as tert-butyl ether, ester solvents such as ethyl acetate, ketone solvents such as acetone and methyl ethyl ketone, and mixed solvents thereof.
After the reaction, the complex compound obtained by a method usually used in organic synthetic chemistry (for example, various column chromatography methods, recrystallization methods, washing with a solvent, etc.) may be purified as necessary.

Specific examples of compound (I) are illustrated below.

Specific examples of the complex compound of the present invention are shown in Table 1.
In Table 1, a cation represents an amine cation or a quaternary ammonium ion, and a molar ratio represents a molar ratio of each component in the complex compound of the present invention [compound (I): metal: cation]. .
In Table 1, A1 and A2 represent the following amine cations. In the formula, Et represents an ethyl group, i-Pr represents an isopropyl group, and i-Bu represents an isobutyl group. B1 to B12 represent the quaternary ammonium ions exemplified above.

The complex compound of the present invention is used as a dye for optical recording media, an ultraviolet absorber, a two-photon absorption dye as a three-dimensional recording material, a sensitizing dye for short-wavelength laser (for example, blue-violet laser), and the like. be able to.
The complex compound of the present invention has properties such as excellent solubility, excellent coating properties, excellent light resistance, excellent moisture and heat resistance, and excellent water resistance.

(Optical recording medium)
The optical recording medium of the present invention contains the complex compound of the present invention and has excellent light resistance, excellent moisture and heat resistance, excellent recording / reproducing characteristics, and the like.
Examples of the optical recording medium of the present invention include a substrate, a reflective layer, a recording layer, a transparent protective layer, and a cover layer. The reflective layer, the recording layer, the transparent protective layer, and the cover are provided on the substrate. It is preferable that the layers are provided in this order.

Examples of the optical recording medium of the present invention include those having a recording layer containing the complex compound of the present invention. When the recording layer is formed using the complex compound of the present invention, the complex compound of the present invention may be used alone or in admixture of two or more.
You may use together and use the complex compound of this invention, and another pigment | dye. Other dyes preferably have absorption in the wavelength region of the recording laser light. In addition, a dye that does not hinder the formation of information recording (recording marks, etc. formed at a laser irradiation site due to thermal deformation in the recording layer, the reflective layer or the transparent protective layer, and the cover layer) may be used as another dye. preferable. Examples of other dyes include metal-containing azo dyes other than the complex compounds of the present invention, phthalocyanine dyes, naphthalocyanine dyes, cyanine dyes, azo dyes, squarylium dyes, metal-containing indoaniline dyes, tria. Examples include a reel methane dye, a merocyanine dye, an azurenium dye, a naphthoquinone dye, an anthraquinone dye, an indophenol dye, a xanthene dye, an oxazine dye, and a pyrylium dye. You may use these individually or in mixture of 2 or more types. Among other dyes, a dye suitable for recording using a laser beam such as a near infrared laser beam of 770 nm to 830 nm, a red laser beam of 620 nm to 690 nm, and the complex compound of the present invention are used in combination. An optical recording medium capable of recording with a laser beam can also be produced.

  The recording layer may contain a binder as necessary. Examples of the binder include polyvinyl alcohol, polyvinyl pyrrolidone, nitrocellulose, cellulose acetate, polyvinyl butyral, ketone resin, polycarbonate resin, and silicone resin. You may use these individually or in mixture of 2 or more types.

In addition, the recording layer may contain a singlet oxygen quencher, a recording sensitivity improver, or the like in order to improve the stability and light resistance of the recording layer.
Examples of the singlet oxygen quencher include transition metal chelate compounds (for example, chelate compounds of transition metal with acetylacetonate, bisphenyldithiol, salicylaldehyde oxime, bisdithio-α-diketone, etc.) and the like. You may use these individually or in mixture of 2 or more types.
As the recording sensitivity improver, a compound in which a metal such as a transition metal is contained in a compound in the form of atoms, ions, clusters, etc., for example, an ethylenediamine complex, an azomethine complex, a phenylhydroxyamine complex, a phenanthroline complex, And organic metal compounds such as dihydroxyazobenzene complex, dioxime complex, nitrosoaminophenol complex, pyridyltriazine complex, acetylacetonate complex, metallocene complex and porphyrin complex. You may use these individually or in mixture of 2 or more types.

The thickness of the recording layer of the optical recording medium of the present invention is preferably 1 nm to 5 μm, more preferably 5 nm to 100 nm, and further preferably 15 nm to 60 nm.
The recording layer can be formed by a known thin film forming method such as a vacuum deposition method, a sputtering method, a doctor blade method, a cast method, a spin coating method, or an immersion method, but from the viewpoint of mass productivity and cost, a spin coating method is used. Is preferred. When the recording layer is formed by the spin coating method, in order to obtain an appropriate film thickness, it is preferable to use a solution prepared by adjusting the concentration of the complex compound of the present invention to 0.3 mass% to 2.5 mass%. The number is preferably 500 rpm to 10,000 rpm. After applying the solution by a spin coating method, treatment such as heating, drying under reduced pressure, or exposure to solvent vapor may be performed.

  When a recording layer is formed by applying a solution (for example, a doctor blade method, a cast method, a spin coating method, a dipping method, etc.), the solvent of the solution may be on the substrate before applying the substrate and the recording layer. The solvent is not particularly limited as long as it is a solvent that does not attack the formed layer (for example, a reflective layer). For example, ketone alcohol solvents such as diacetone alcohol, 3-hydroxy-3-methyl-2-butanone, cellosolv solvents such as methyl cellosolve, ethyl cellosolve, propylene glycol monomethyl ether, n-hexane, n-octane, cyclohexane, Hydrocarbon solvents such as methylcyclohexane, ethylcyclohexane, dimethylcyclohexane, n-butylcyclohexane, tert-butylcyclohexane, cyclooctane, ether solvents such as diisopropyl ether and dibutyl ether, 2,2,3,3-tetrafluoropropanol , Fluoroalkyl alcohol solvents such as octafluoropentanol and hexafluorobutanol, methyl lactate, ethyl lactate, methyl isobutyrate, propylene glycol monomethyl ether Ester solvents such as Le acetate. You may use these individually or in mixture of 2 or more types.

The substrate of the optical recording medium of the present invention preferably has a guide groove formed in a spiral shape on the surface for recording / reproduction with a laser beam. As the substrate, those which can easily form fine grooves having a narrow track pitch are preferable, and specific examples thereof include glass and plastic. Examples of plastics include acrylic resin, methacrylic resin, polycarbonate resin, vinyl chloride resin, vinyl acetate resin, nitrocellulose, polyester resin, polyethylene resin, polypropylene resin, polyimide resin, polystyrene resin, epoxy resin, and alicyclic polyolefin resin. However, a polycarbonate resin is preferable from the viewpoint of high productivity, cost, moisture absorption resistance, and the like.
The substrate is preferably produced by injection molding the plastic. Examples of a method for producing a substrate by injection molding include a method using a stamper made of a metal such as Ni in which a guide groove is formed.
The master for producing the stamper is produced, for example, as follows. Polish the surface of the disk-shaped glass substrate to be smooth. A photoresist whose thickness is adjusted according to a desired groove depth is applied on the substrate. Next, the photoresist is exposed using a laser beam or an electron beam having a wavelength shorter than that of the blue-violet laser beam and developed, thereby producing a master having a guide groove.
Next, a conductive film such as Ni is vacuum-deposited on the surface of the master, and a stamper made of a metal such as Ni in which a guide groove is formed is produced through a plating process. A substrate having guide grooves formed on the surface is produced by injection molding the plastic using this stamper.
The guide groove preferably has a height difference (groove depth) between the top and bottom surfaces of the unevenness of 15 nm to 80 nm, and more preferably 25 nm to 50 nm. The ratio of the width of the convex portion to the concave portion is preferably in the range of 40%: 60% to 60%: 40% (convex portion: concave portion).

  The reflective layer is preferably a metal. Examples of the metal include gold, silver, aluminum, and alloys thereof. From the viewpoint of reflectivity with respect to laser light having a wavelength of 550 nm or less and surface smoothness, an alloy mainly composed of silver or silver is used. preferable. The silver-based alloy preferably contains about 90% or more of silver, and as a component other than silver, a group of Cu, Pd, Ni, Si, Au, Al, Ti, Zn, Zr, Nb, Bi and Mo What contains 1 or more types chosen from is preferable. The reflective layer can be formed on the substrate by, for example, vapor deposition, sputtering (eg, DC sputtering), ion plating, or the like. An intermediate layer may be provided between the reflective layer and the recording layer for the purpose of improving the recording / reproducing characteristics or adjusting the reflectance. Specific examples of the intermediate layer include metals, metal oxides, and metal nitrides. The thickness of the reflective layer is preferably 5 nm to 300 nm, and more preferably 20 nm to 100 nm.

The transparent protective layer preferably has no or little absorption with respect to the laser beam used during recording and reproduction, and the real part of the refractive index is relatively large, about 1.5 to 2.0. What has the value of is preferable. Specific examples of the transparent protective layer include metal oxides, metal nitrides, metal sulfides, and mixtures thereof.
The thickness of the transparent protective layer is preferably 5 nm to 50 nm. When the thickness of the transparent protective layer is 5 nm or more, a recording signal formed by deforming the recording layer can be clearly separated from an unrecorded portion between the recording marks, so that a better signal can be obtained. Further, when the thickness of the transparent protective layer is 50 nm or less, the transparent protective layer is easily deformed, so that a better signal can be obtained. The transparent protective layer can be formed on the recording layer by sputtering (for example, RF sputtering, DC sputtering, etc.). Examples of the target material used when forming the transparent protective layer by the sputtering method include ZnS—SiO ₂ and indium tin oxide (ITO).

The cover layer is made of, for example, a polycarbonate resin sheet having a thickness of about 0.1 mm and having an adhesive layer that is transparent to the recording / reproducing laser beam on the surface, and the sheet is transparent through the adhesive layer. It can form on a transparent protective layer by pressure-bonding to a protective layer. The adhesive layer is preferably one that does not hinder the deformation of the recording layer and the transparent protective layer during information recording. The cover layer can also be formed using an ultraviolet curable resin, and the ultraviolet curable resin is preferably one that does not hinder the deformation of the recording layer and the transparent protective layer during information recording, like the adhesive layer.
It is preferable to form a hard coat on the cover layer.

Since the optical recording medium of the present invention contains the complex compound of the present invention, the wavelength of the laser beam used during recording is preferably 350 nm to 530 nm. In general, the shorter the wavelength of laser light used for recording, the higher the density recording possible.
Specific examples of laser light include, for example, blue-violet laser light having a center wavelength of 405 nm, 410 nm, and the like, and a blue-green high-power semiconductor laser light having a center wavelength of 515 nm. Some blue-violet high-power semiconductor laser light is preferred.
A semiconductor laser beam capable of continuous oscillation having a fundamental oscillation wavelength of 740 nm to 960 nm, a solid laser beam excited by the semiconductor laser beam and capable of continuous oscillation having a fundamental oscillation wavelength of 740 nm to 960 nm, etc. Light obtained by wavelength conversion by SHG) may be used. SHG may be any piezo element that lacks reflection symmetry, but KDP (KH ₂ PO ₄ ), ADP (NH ₄ H ₂ PO ₄ ), BNN (Ba ₂ NaNb ₅ O ₁₅ ), KN ( KNbO ₃ ), LBO (LiB ₃ O ₅ ), compound semiconductors and the like are preferable.
Specific examples of light (second harmonic) obtained by wavelength conversion by SHG include 430 nm light obtained by wavelength conversion of semiconductor laser light having a fundamental oscillation wavelength of 860 nm, and semiconductor laser excitation having a fundamental oscillation wavelength of 860 nm. Examples thereof include 430 nm light obtained by wavelength conversion of solid laser light.

  The optical recording medium of the present invention is preferably BD. The BD is an optical recording medium that uses a blue-violet laser having a wavelength of 405 nm and records a higher density information by reducing the laser spot diameter by setting the NA of the objective lens to 0.85. In the BD-R, a reflective layer, a recording layer, a transparent protective layer, and a cover layer thinner than the substrate are sequentially laminated on the substrate. Recording and reproduction is performed by irradiating a blue-violet laser beam from the cover layer side.

Hereinafter, the present invention will be described more specifically with reference to synthesis examples, examples and test examples.
The abbreviations are explained below.
TFP: 2,2,3,3-tetrafluoropropanol DMSO: dimethyl sulfoxide

[Production of raw material for compound (I)]
“Journal of Organic Chemistry”, 1999, Vol. 64, p. In accordance with the method described in 5644-5649, 5-hydrazino-1-phenyl-1H-tetrazole was obtained by reacting 5-chloro-1-phenyl-1H-tetrazole with hydrazine hydrate.
In the same manner as the method for producing 5-hydrazino-1-phenyl-1H-tetrazole, 2-hydrazinobenzoxazole was obtained.

[Production of quaternary ammonium salt]
“Journal of the American Chemical Society”, 1950, Vol. 72, p. In accordance with the method described in 2040-2044, 1- [5- (1-quinolinium) pentyl] quinolinium dibromide was obtained by reacting quinoline with 1,5-dibromopentane.
In the same manner as in the method for producing 1- [5- (1-quinolinium) pentyl] quinolinium dibromide, 2- [5- (2-isoquinolinium) pentyl] isoquinolinium dibromide, and 3, 5-Dimethyl-1- {4-[(3,5-dimethyl-1-pyridinyl) methyl] benzyl} pyridinium dichloride was obtained.

  “Journal of Materials Chemistry”, 2006, Vol. 16, p. In accordance with the method described in 345-347, 1,1′-bis (2,4-dinitrophenyl) -4,4′-bipyridinium dichloride is reacted with 4-tert-butylaniline to produce 1,1 ′ -Bis (4-tert-butylphenyl) -4,4'-bipyridinium dichloride was obtained.

“Organic Letters”, 2007, Vol. 9, p. In accordance with the method described in 3495-3498, 1,2-dimethyl-3- {2-[(1,2,1-dimethylimidazole) is reacted with α, α′-dichloro-o-xylylene. -Dimethyl-1H-imidazol-3-ium-3-yl) methyl] benzyl} -1H-imidazol-3-ium dichloride was obtained.
Similar to the method for producing 1,2-dimethyl-3- {2-[(1,2-dimethyl-1H-imidazol-3-ium-3-yl) methyl] benzyl} -1H-imidazol-3-ium dichloride 1- (2-cyanoethyl) -2-methyl-3- {4- [1- (2-cyanoethyl) -2-methyl-1H-imidazol-3-ium-3-yl] butyl} -1H- Imidazole-3-ium dibromide, 1- (2-cyanoethyl) -2-phenyl-3- {4- [1- (2-cyanoethyl) -2-phenyl-1H-imidazol-3-ium-3-yl] butyl} -1H-imidazole-3-ium dibromide, 4,4'-bis [(1,2-dimethyl-1H-imidazol-3-ium-3-yl) methyl] -1,1'-biphenyl dichloride, 4, '-Bis {[1- (2-cyanomethyl) -2-methyl-1H-imidazol-3-ium-3-yl] methyl} -1,1'-biphenyl dichloride, 1,4-bis {[1- ( 2-cyanomethyl) -2-methyl-1H-imidazol-3-ium-3-yl] methyl} benzene dichloride, and 1,2-dimethyl-3- [4- (1,2-dimethyl-1H-imidazole-3) -Ium-3-yl) butyl] -1H-imidazole-3-ium dibromide was obtained.

  “Journal of the American Chemical Society”, 2009, vol. 131, p. According to the method described in 9931-9933, 2,8′-bipyridine and 1,3-dibromopropane are reacted to produce 7,8-dihydro-6H-dipyrido [1,2-a: 2 ′, 1 '-C] [1,4] diazepine diium dibromide was obtained.

[Production of Compound (I)]
Synthesis Example 1: Production of Compound (I-1) 4- (diethylamino) salicylaldehyde (10.00 g), 5-hydrazino-1-phenyl-1H-tetrazole (9.11 g) and methanol (100 ml) were mixed and stirred at 50 ° C. for 3 hours. did. The reaction mixture was cooled to room temperature, and the precipitated solid was collected by filtration, washed with methanol, and dried to obtain 17.13 g (yield 94%) of compound (I-1).
¹ H-NMR (400 MHz) δ (DMSO-d ₆ ) ppm: 0.97 (6H, t, J = 6.8 Hz), 3.28-3.34 (4H, m), 6.03-6. 16 (2H, m), 6.94 (1H, d, J = 8.8 Hz), 7.55-7.65 (5H, m), 8.15 (1H, s), 10.16 (1H, s), 11.11 (1H, s).

Synthesis Example 2: Production of Compound (I-2) 4-methoxysalicylaldehyde (6.00 g), 5-hydrazino-1-phenyl-1H-tetrazole (6.95 g) and methanol (60 ml) were mixed and stirred at 50 ° C. for 3 hours. The reaction mixture was cooled to room temperature, and the precipitated solid was collected by filtration, washed with methanol, and dried to obtain 11.75 g (yield 96%) of compound (I-2).
¹ H-NMR (400 MHz) δ (DMSO-d ₆ ) ppm: 3.72 (3H, s), 6.34-6.39 (2H, m), 7.02 (1H, d, J = 8. 4Hz), 7.55-7.65 (5H, m), 8.24 (1H, s), 10.40 (1H, s), 11.39 (1H, s).

Synthesis Example 3: Production of Compound (I-3) 4-methoxysalicylaldehyde (3.00 g), 2-hydrazino-benzoxazole (2.94 g) and ethanol (60 ml) were mixed and stirred at 50 ° C. for 3 hours. The reaction mixture was cooled to room temperature, and the precipitated solid was collected by filtration, washed with ethanol, and dried to obtain 5.42 g of Compound (I-3) (yield 97%).
¹ H-NMR (400 MHz) δ (DMSO-d ₆ ) ppm: 3.76 (3H, s), 6.47-6.52 (2H, m), 7.05-7.48 (5H, m) , 8.35 (1H, s), 10.91 (1H, s), 11.93 (1H, s).

[Production of complex compounds]
Example 1
-Production of complex compound (1)-
To a mixture of 5.00 g of compound (I-1), 3.68 g of diisobutylamine and 50 ml of methanol, 1.77 g of cobalt (II) acetate tetrahydrate was added, and the mixture was stirred at 50 ° C. for 4 hours. The reaction mixture was cooled to room temperature, and the precipitated solid was collected by filtration, washed with methanol, and dried to obtain 5.09 g of complex compound (1) (yield 81%).
Absorption maximum wavelength (TFP): 389.0 nm
¹ H-NMR (400 MHz) δ (DMSO-d ₆ ) ppm: 0.93-1.00 (24H, m), 1.92-1.99 (2H, m), 2.74 (4H, d, J = 7.2 Hz), 3.18-3.20 (8H, m), 5.68-5.95 (4H, m), 7.14-7.31 (4H, m), 7.54- 7.58 (4H, m), 7.9-8.08 (6H, m), 8.42 (2H, s).

(Example 2)
-Production of complex compound (2)-
1.00 g of complex compound (1), 0.30 g of 1- [5- (1-quinolinium) pentyl] quinolinium dibromide and 15 ml of methanol were mixed and stirred at 50 ° C. for 3 hours. The reaction mixture was cooled to room temperature, and the precipitated solid was collected by filtration, washed with methanol, and dried to obtain 1.03 g of complex compound (2) (99% yield).
Absorption maximum wavelength (TFP): 388.5 nm
¹ H-NMR (400 MHz) δ (DMSO-d ₆ ) ppm: 0.92 to 0.95 (24H, m), 1.45 to 1.66 (2H, m), 1.96 to 2.00 ( 4H, m), 3.19-3.19 (16H, m), 4.96-4.99 (4H, m), 5.66-5.93 (8H, m), 7.14-7. 29 (8H, m), 7.51-7.55 (8H, m), 7.98-8.18 (14H, m), 8.41-8.50 (8H, m), 9.21- 9.44 (4H, m).

Example 3
-Production of complex compound (3)-
1.00 g of complex compound (1), 0.30 g of 2- [5- (2-isoquinolinium) pentyl] isoquinolinium dibromide and 15 ml of methanol were mixed and stirred at 50 ° C. for 3 hours. The reaction mixture was cooled to room temperature, and the precipitated solid was collected by filtration, washed with methanol, and dried to obtain 1.02 g of complex compound (3) (yield 98%).
Absorption maximum wavelength (TFP): 388.5 nm
¹ H-NMR (400 MHz) δ (DMSO-d ₆ ) ppm: 0.94-0.97 (24H, m), 1.33-1.44 (2H, m), 2.02-2.06 ( 4H, m), 3.13-3.17 (16H, m), 4.65-4.68 (4H, m), 5.66-5.94 (8H, m), 7.13-7. 30 (8H, m), 7.53-7.57 (8H, m), 8.04-8.06 (10H, m), 8.23-8.74 (14H, m), 9.99 ( 2H, s).

Example 4
-Production of complex compound (4)-
1.00 g of complex compound (1), 0.24 g of 3,5-dimethyl-1- {4-[(3,5-dimethyl-1-pyridinyl) methyl] benzyl} pyridinium dichloride and 10 ml of methanol were mixed, and 50 Stir at 0 ° C. for 3 hours. The reaction mixture was cooled to room temperature, and the precipitated solid was collected by filtration, washed with methanol, and dried to obtain 1.02 g (yield 98%) of the complex compound (4).
Absorption maximum wavelength (TFP): 388.0 nm
¹ H-NMR (400 MHz) δ (DMSO-d ₆ ) ppm: 0.92-0.95 (24H, m), 2.35 (12H, s), 3.09-3.18 (16H, m) , 5.64-5.93 (12H, m), 7.12-7.29 (8H, m), 7.51-7.55 (12H, m), 8.03-8.43 (14H, m), 8.86 (4H, s).

(Example 5)
-Production of complex compound (5)-
Complex compound (1) 1.00 g, 1,2-dimethyl-3- {2-[(1,2-dimethyl-1H-imidazol-3-ium-3-yl) methyl] benzyl} -1H-imidazole-3 -0.23 g of ium dichloride and 10 ml of methanol were mixed and stirred at 50 ° C for 3 hours. The reaction mixture was cooled to room temperature, and the precipitated solid was collected by filtration, washed with methanol, and dried to obtain 0.97 g of complex compound (5) (yield 94%).
Absorption maximum wavelength (TFP): 388.5 nm
¹ H-NMR (400 MHz) δ (DMSO-d ₆ ) ppm: 0.92 to 0.97 (24H, m), 2.33 (6H, s), 3.05 to 3.16 (16H, m) 3.64 (6H, s), 5.52-5.92 (12H, m), 6.64-6.66 (2H, m), 7.12-7.61 (22H, m), 8 .02-8.04 (8H, m), 8.44 (4H, s).

(Example 6)
-Production of complex compound (6)-
1.00 g of complex compound (1), 0.31 g of 1,1′-bis (4-tert-butylphenyl) -4,4′-bipyridinium dichloride and 10 ml of methanol were mixed and stirred at 50 ° C. for 3 hours. The reaction mixture was cooled to room temperature, and the precipitated solid was collected by filtration, washed with methanol, and dried to obtain 1.06 g of complex compound (6) (yield 97%).
Absorption maximum wavelength (TFP): 386.5 nm
¹ H-NMR (400 MHz) δ (DMSO-d ₆ ) ppm: 0.92-0.95 (24H, m), 1.36 (18H, m), 3.13-3.17 (16H, m) , 5.65-5.89 (8H, m), 7.11-7.29 (8H, m), 7.52-8.23 (24H, m), 8.43 (4H, s), 8 .91-9.56 (8H, m).

(Example 7)
-Production of complex compound (7)-
To a mixture of 11.00 g of compound (I-2), 9.16 g of diisobutylamine and 90 ml of methanol was added 4.41 g of cobalt (II) acetate tetrahydrate, and the mixture was stirred at 50 ° C. for 6 hours. The reaction mixture was cooled to room temperature, and the precipitated solid was collected by filtration, washed with methanol, and dried to obtain 11.78 g of complex compound (7) (yield 83%).
Absorption maximum wavelength (TFP): 373.0 nm
¹ H-NMR (400 MHz) δ (DMSO-d ₆ ) ppm: 0.93 (12H, d, J = 6.8 Hz), 1.91-1.98 (2H, m), 2.73 (4H, d, J = 7.2 Hz), 3.55 (6H, s), 6.05-6.07 (4H, m), 7.28-7.33 (4H, m), 7.54-7. 58 (4H, m), 8.05-8.07 (6H, m), 8.59 (2H, s).

(Example 8)
-Production of complex compound (8)-
Complex compound (7) 0.50 g, 1,2-dimethyl-3- {2-[(1,2-dimethyl-1H-imidazol-3-ium-3-yl) methyl] benzyl} -1H-imidazole-3 -0.12 g of ium dibromide and 10 ml of methanol were mixed and stirred at 50 ° C for 3 hours. The reaction mixture was cooled to room temperature, and the precipitated solid was collected by filtration, washed with methanol, and dried to obtain 0.46 g of complex compound (8) (yield 90%).
Absorption maximum wavelength (TFP): 373.0 nm
¹ H-NMR (400 MHz) δ (DMSO-d ₆ ) ppm: 2.41 (6H, s), 3.49 (12H, s), 3.72 (6H, s), 5.45-5.55 (4H, m), 5.99-6.06 (8H, m), 6.72-6.75 (2H, m), 7.28-7.66 (22H, m), 8.04-8 .06 (8H, m), 8.61 (4H, s).

Example 9
-Production of complex compound (9)-
Complex compound (7) 0.50 g, 1- (2-cyanoethyl) -2-methyl-3- {4- [1- (2-cyanoethyl) -2-methyl-1H-imidazol-3-ium-3-yl ] Butyl} -1H-imidazole-3-ium dibromide 0.17 g and methanol 10 ml were mixed and stirred at 50 ° C. for 3 hours. The reaction mixture was cooled to room temperature, and the precipitated solid was collected by filtration, washed with methanol, and dried to obtain 0.44 g of complex compound (9) (yield 85%).
Absorption maximum wavelength (TFP): 372.5 nm
¹ H-NMR (400 MHz) δ (DMSO-d ₆ ) ppm: 1.68-1.75 (4H, m), 2.64 (6H, s), 3.09-3.12 (4H, m) , 3.55 (12H, s), 4.13-4.18 (4H, m), 4.44-4.47 (4H, m), 6.05-6.07 (8H, m), 7 .28-7.72 (20H, m), 8.05-8.06 (8H, m), 8.59 (4H, s).

(Example 10)
-Production of complex compound (10)-
Complex compound (7) 0.50 g, 1- (2-cyanoethyl) -2-phenyl-3- {4- [1- (2-cyanoethyl) -2-phenyl-1H-imidazol-3-ium-3-yl ] Butyl} -1H-imidazole-3-ium dibromide 0.21 g and methanol 10 ml were mixed and stirred at 50 ° C. for 3 hours. The reaction mixture was cooled to room temperature, and the precipitated solid was collected by filtration, washed with methanol, and dried to obtain 0.51 g of complex compound (10) (yield 91%).
Absorption maximum wavelength (TFP): 372.5 nm
¹ H-NMR (400 MHz) δ (DMSO-d ₆ ) ppm: 1.46 to 1.52 (4H, m), 3.00 to 3.03 (4H, m), 3.54 (12H, s) , 3.81-3.90 (4H, m), 4.20-4.23 (4H, m), 6.05-6.07 (8H, m), 7.28-7.33 (8H, m), 7.54-8.07 (30H, m), 8.59 (4H, s).

(Example 11)
-Production of complex compound (11)-
Complex compound (7) 0.50 g, 7,8-dihydro-6H-dipyrido [1,2-a: 2 ′, 1′-c] [1,4] diazepine diium dibromide 0.12 g and methanol 10 ml Were mixed and stirred at 50 ° C. for 3 hours. The reaction mixture was cooled to room temperature, and the precipitated solid was collected by filtration, washed with methanol, and dried to obtain 0.44 g of a complex compound (11) (yield 92%).
Absorption maximum wavelength (TFP): 373.0 nm
¹ H-NMR (400 MHz) δ (DMSO-d ₆ ) ppm: 2.69-2.80 (2H, m), 3.55 (12H, s), 4.97-5.00 (4H, m) , 6.05-6.08 (8H, m), 7.28-7.58 (16H, m), 8.05-8.48 (12H, m), 8.59 (4H, s), 8 90-9.33 (4H, m).

(Example 12)
-Production of complex compound (12)-
0.50 g of complex compound (7), 4,4′-bis [(1,2-dimethyl-1H-imidazol-3-ium-3-yl) methyl] -1,1′-biphenyl dichloride 0.15 g and methanol 10 ml was mixed and stirred at 50 ° C. for 3 hours. The reaction mixture was cooled to room temperature, and the precipitated solid was collected by filtration, washed with methanol, and dried to obtain 0.48 g (yield 90%) of the complex compound (12).
Absorption maximum wavelength (TFP): 373.0 nm
¹ H-NMR (400 MHz) δ (DMSO-d ₆ ) ppm: 2.60 (6H, s), 3.54 (12H, s), 3.74 (6H, s), 5.43 (4H, s) ), 6.05-6.07 (8H, m), 7.28-7.72 (28H, m), 8.05-8.06 (8H, m), 8.59 (4H, s).

(Example 13)
-Production of complex compound (13)-
Complex compound (7) 0.50 g, 4,4′-bis {[1- (2-cyanomethyl) -2-methyl-1H-imidazol-3-ium-3-yl] methyl} -1,1′-biphenyl Dichloride (0.18 g) and methanol (10 ml) were mixed and stirred at 50 ° C. for 3 hours. The reaction mixture was cooled to room temperature, and the precipitated solid was collected by filtration, washed with methanol, and dried to obtain 0.50 g (yield 90%) of the complex compound (13).
Absorption maximum wavelength (TFP): 373.0 nm
¹ H-NMR (400 MHz) δ (DMSO-d ₆ ) ppm: 2.70 (6H, s), 3.14 (4H, t, J = 6.4 Hz), 3.54 (12H, s), 4 .47 (4H, t, J = 6.4 Hz), 5.47 (4H, s), 6.05-6.07 (8H, m), 7.28-7.81 (28H, m), 8 .05-8.06 (8H, m), 8.59 (4H, s).

(Example 14)
-Production of complex compound (14)-
Complex compound (7) 0.50 g, 1,4-bis {[1- (2-cyanomethyl) -2-methyl-1H-imidazol-3-ium-3-yl] methyl} benzene dichloride 0.15 g and methanol 10 ml Were mixed and stirred at 50 ° C. for 3 hours. The reaction mixture was cooled to room temperature, and the precipitated solid was collected by filtration, washed with methanol, and dried to obtain 0.50 g (yield 94%) of the complex compound (14).
Absorption maximum wavelength (TFP): 373.0 nm
¹ H-NMR (400 MHz) δ (DMSO-d ₆ ) ppm: 2.65 (6H, s), 3.12 (4H, t, J = 6.8 Hz), 3.54 (12H, s), 4 .46 (4H, t, J = 6.8 Hz), 5.42 (4H, s), 6.05-6.07 (8H, m), 7.28-7.58 (20H, m), 7 .73-8.06 (12H, m), 8.59 (4H, s).

(Example 15)
-Production of complex compound (15)-
To a mixture of 2.00 g of compound (I-3), 1.82 g of diisopropylethylamine and 20 ml of methanol was added 0.88 g of cobalt acetate (II) tetrahydrate, and the mixture was stirred at 50 ° C. for 6 hours. The reaction mixture was cooled to room temperature, and the precipitated solid was collected by filtration, washed with methanol, and dried to obtain 2.35 g of complex compound (15) (yield 89%).
Absorption maximum wavelength (TFP): 380.5 nm
¹ H-NMR (400 MHz) δ (DMSO-d ₆ ) ppm: 1.21-1.26 (15H, m), 3.08-3.17 (2H, m), 3.53 (6H, s) , 3.56-3.62 (2H, m), 5.97-6.02 (4H, m), 6.52-7.26 (10H, m), 8.14 (1H, s), 8 .50 (2H, s).

(Example 16)
-Production of complex compound (16)-
Complex Compound (15) 0.50 g, 1,2-dimethyl-3- [4- (1,2-dimethyl-1H-imidazol-3-ium-3-yl) butyl] -1H-imidazol-3-ium dibromide 0 .15 g and 10 ml of methanol were mixed and stirred at 50 ° C. for 3 hours. The reaction mixture was cooled to room temperature, and the precipitated solid was collected by filtration, washed with methanol, and dried to obtain 0.48 g of complex compound (16) (yield 96%).
Absorption maximum wavelength (TFP): 380.5 nm
¹ H-NMR (400 MHz) δ (DMSO-d ₆ ) ppm: 1.60-1.73 (4H, m), 2.53 (6H, s), 3.53 (12H, s), 3.71 (6H, s), 4.01-4.16 (4H, m), 5.98-6.02 (8H, m), 6.52-7.59 (24H, m), 8.51 (4H , S).

(Test Example 1)
-Solubility test-
980 mg of TFP was added to each of 20 mg of the complex compounds (1) to (16), and ultrasonic vibration was applied at room temperature for 30 minutes. It was visually confirmed that 20 mg of complex compounds (1) to (16) were completely dissolved in 980 mg of TFP.

(Test Example 2)
-Coating property test-
Each of 20 mg of the complex compounds (1) to (16) was dissolved in 980 mg of TFP and filtered through a Teflon (registered trademark) filter (Whatman, pore size 0.20 μm), and the complex compounds (1) to (16) ) Solution was obtained. Using a polycarbonate resin plate (made by Dazai Equipment Co., Ltd .; diameter 2 inches, thickness 1 mm) as a substrate, spin coating method (3,000 rpm, 30 seconds, amount of solution used) using 1H-SX made by Mikasa Co., Ltd .; The solution was applied onto a substrate at 0.25 g to 0.30 g), and the substrate was dried in an oven at 70 ° C. for 30 minutes to obtain complex compound thin films, respectively. It was confirmed by visual observation that the thin films of the obtained complex compounds (1) to (16) had no unevenness and were uniformly formed.

(Test Example 3)
-Moist heat resistance test-
Thin films of complex compounds (2) to (6), (8) to (14), and (16) were obtained in the same manner as in the coating property test. The thin film was exposed to an atmosphere having a temperature of 80 ° C. and a relative humidity of 80% for 100 hours using a constant temperature and humidity chamber KHWII-40HP manufactured by Satake Chemical Machinery Co., Ltd. In the thin film before and after the wet heat resistance test, an ultraviolet-visible absorption spectrum was measured using a spectrophotometer. Absorbance at the absorption maximum wavelength before moist heat resistance test ratio (I a _⁰⁾ the absorbance at the absorption maximum wavelength after wet heat resistance test for ^{(I a) (I a /} I a 0), and wet heat resistance test maximum absorption wavelength around Table 2 shows the change [Δλmax (a)].
Here, the absorption maximum wavelength after the moisture and heat resistance test represents the absorption maximum wavelength in the absorption spectrum after the moisture and heat resistance test. The closer the ratio (I ^a / I ^a ₀ ) is to 1 and the smaller Δλmax (a), the better the heat and moisture resistance.
It was found that the thin films of the complex compounds (2) to (6), (8) to (14), and (16) each had excellent wet heat resistance.

(Test Example 4)
-Water resistance test-
Thin films of complex compounds (2) to (6), (8) to (14), and (16) were obtained in the same manner as in the coating property test. The thin film was immersed in water at 25 ° C. for 30 minutes. In the thin film before and after the water resistance test, an ultraviolet-visible absorption spectrum was measured using a spectrophotometer. The ratio of the absorbance (I ^b ) at the absorption maximum wavelength after the water resistance test to the absorbance (I ^b ₀ ) at the absorption maximum wavelength before the water resistance test (I ^b / I ^b ₀ ), and the absorption maximum wavelength before and after the water resistance test Table 3 shows the change [Δλmax (b)].
Here, the absorption maximum wavelength after the water resistance test represents the absorption maximum wavelength in the absorption spectrum after the water resistance test. The closer the ratio (I ^b / I ^b ₀ ) is to 1, and the smaller Δλmax (b), the better the water resistance.
It was found that the thin films of the complex compounds (2) to (6), (8) to (14), and (16) each had excellent water resistance.

(Example 17)
-Manufacture of optical recording media-
As a substrate, a polycarbonate resin disk having an outer diameter of 120 mm and a thickness of 1.1 mm having a through hole in the center and a guide groove having a track pitch of 0.32 μm on the surface was used. On the surface of the substrate where the guide groove was formed, an Ag alloy reflective layer having a thickness of 40 nm to 60 nm was formed by sputtering.
20 mg of complex compound (2) was dissolved in 1,980 mg of TFP, and filtered through a Teflon (registered trademark) filter (Whatman, pore size 0.20 μm) to obtain a solution of complex compound (2). The solution was applied onto the reflective layer by spin coating (1,200 rpm to 5,000 rpm, 10 seconds, amount of solution used: 1 ml) using 1H-SX manufactured by Mikasa, and the oven was heated at 70 ° C. for 30 minutes. The substrate was dried inside to form a recording layer. Next, a transparent protective film having a thickness of 10 nm to 20 nm is formed on the recording layer by RF sputtering using ZnS—SiO ₂ (composition ratio: ZnS / SiO ₂ = 80 mass% / 20 mass%) as a target material. A layer was formed. Subsequently, the optical recording medium (2) was manufactured by sticking the cover film (D-900) made on the transparent protective layer using the cover film sticking apparatus (Opteria MODEL300m / ST) made by Lintec. .
Except for using complex compounds (3) to (6), (8) to (14), and (16) instead of using complex compound (2), the production method of optical recording medium (2) is the same. Optical recording media (3) to (6), (8) to (14), and (16) were produced.

(Test Example 5)
-Test for evaluating recording / reproduction characteristics of optical recording media-
About optical recording media (2)-(6), (8)-(14), and (16), the recording power of the recording laser beam using a recording / reproducing apparatus (Pulstec Industrial Co., Ltd., ODU-1000) Was measured in the range of 3 mW to 8 mW [measurement conditions: wavelength 405 nm, numerical aperture NA 0.85, recording speed 9.84 m / s (double speed)].
With regard to the dependency of the obtained recording power on jitter, the minimum jitter in the recording power range of 3 mW to 8 mW was defined as bottom jitter. Table 4 shows the obtained bottom jitter and the recording power at the bottom jitter value. The bottom jitter and the smaller the recording power, the better the recording / reproducing characteristics.
It was found that the optical recording media (2) to (6), (8) to (14), and (16) each had excellent recording / reproduction characteristics. Among these, it was found that the optical recording media (9), (10), (12), (13) and (14) have particularly excellent recording / reproducing characteristics.

  The present invention can provide a complex compound or the like used for an optical recording medium having excellent recording / reproducing characteristics.

Claims (9)

Formula (I)

[Wherein R ¹ , R ² , R ³ and R ⁴ may be the same or different, and may be a hydrogen atom, a hydroxyl group, a halogen atom, a nitro group, a cyano group or an amino group which may have a substituent. A group, an alkyl group which may have a substituent, an alkoxyl group which may have a substituent, an aralkyl group which may have a substituent, an aryl group which may have a substituent, Represents an alicyclic hydrocarbon group which may have a substituent or a heterocyclic group which may have a substituent, and R ⁵ represents a hydrogen atom, an alkyl group which may have a substituent, a substituted group. An alkenyl group which may have a group, an aralkyl group which may have a substituent, an aryl group which may have a substituent, an alicyclic hydrocarbon group which may have a substituent Or represents a heterocyclic group which may have a substituent, and ring A represents a substituent. The heterocyclic ring may be a pyrimidine ring, tetrazole ring, triazole ring, imidazole ring, benzimidazole ring, thiazole ring, benzothiazole ring, oxazole ring, benzoxazole ring, pyridine ring, pyridazine ring Selected from the group consisting of a phthalazine ring and a quinazoline ring], a metal, an ion generated by adding one or more protons to an amine, an ammonium ion, and a quaternary ammonium ion. A complex compound comprising one selected. The complex according to claim 1, wherein R ⁵ is a hydrogen atom, an alkyl group which may have a substituent, an alkenyl group which may have a substituent, or an aryl group which may have a substituent. Compound.   The ring A is a tetrazole ring which may have a substituent, a benzothiazole ring which may have a substituent or a benzoxazole ring which may have a substituent. Complex compounds.   The complex compound according to claim 1, wherein the metal is cobalt, rhodium, iridium, aluminum, gallium or iron.   The complex compound according to claim 1, wherein the metal is cobalt.   One selected from the group consisting of an ion generated by adding one or more protons to an amine, an ammonium ion and a quaternary ammonium ion is an ion generated by adding one or more protons to the amine Item 6. The complex compound according to any one of Items 1 to 5.   The complex compound according to claim 6, wherein the amine is an aliphatic tertiary amine which may have a substituent.   The one selected from the group consisting of an ion generated by adding one or more protons to an amine, an ammonium ion, and a quaternary ammonium ion is a quaternary ammonium ion. Complex compounds.   An optical recording medium containing the complex compound according to claim 1.