JP2003029376A - Optical information recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a two-photon absorption system optical information recording medium having such high sensitivity that two-photon absorption can be brought about using a relatively low power laser. SOLUTION: The two-photon absorption system optical information recording medium is characterized in that it contains a two-photon absorption compound whose two-photon absorption cross-sectional area is >=10<2> GM (1 GM=1×10<-50> cm<4> s molecule<-1> photon<-1> ) and a fluorescent quenching agent.

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] The present invention is based on strong light only.
Contains compounds with large excited two-photon absorption cross sections
The present invention relates to a two-photon absorption optical information recording medium. [0002] 2. Description of the Related Art Usually, a substance corresponds to excitation energy.
This energy is excited by absorbing one photon of energy.
Photons with energy less than-are not absorbed. However
If the light intensity is very strong, the sum of the photon energies is
Two photons corresponding to the excitation energy are absorbed simultaneously.
There is. Using this property, the lens is used to narrow down the light.
It is possible to cause a light reaction only near the focal point.
It is possible to create and use an excited state by selecting a desired position
Yes. But two-photon absorption is usually very unlikely
Therefore, a substance having a high two-photon excitation efficiency has been demanded. Two lights
The two-photon absorption cross section indicating the ease of absorption is usually very
1GM (however, 1GM = 1 x 10)^-50cm^Four s molecule^-1 p
hoton^-1However, the ratio of several hundred to several thousand GM in recent years
Substances with relatively large two-photon absorption cross sections have also been found
The Examples of compounds with a relatively large two-photon absorption cross section are
For example, it is described in the following document. That is, Reinhard
t et al., Chemistry of Materials, 1998
Line, 10: 1863, Science by M. Albota et al.
Magazine, 1998, 281, 1653, author of M.Rumi et al.
Journal of the American Chemical Society, 20
Published in 2000, 122, 9500, J. D. Bhawalkar et al.
, Optics Communications, 1996, 124, 33
Page, S.G.He et al., Applied Physics Letters
Magazine, 1995, 67, 2433, P. N. Prasad et al.
Nonlinear Optics magazine, 1999, 21 pages, 39 pages,
Journal of Applied Physics by G. S. He et al.
Magazine, 1997, 81, 2529, S.-J. Chung et al.
Written by Journal of Physical Chemistry B, 1999
Issue 103, 10741, S. G. He et al., Optics
 Letters, 1995, 20, 435, J. W. Perry
Kano, Nonlinear Optics, 1999, 21, 225
page. However, this size is still very high power
This is not practical because it requires a laser. Ma
The excitation energy can be easily used according to the purpose.
In order to combine various functional substances
Met. The two-photon absorption cross section reported so far
Compounds with a relatively large product emit strong fluorescence,
Some were inconvenient. For example, recording by light irradiation
Record information by inducing a change in the state of the layer,
This change is read by the change in light absorption or reflection.
Generated when used in so-called optical information recording media
It is difficult to distinguish between fluorescence and signal light, which causes noise.
Therefore, two-photon absorption optical information that does not substantially emit fluorescence
There was a need for a recording medium. [0003] DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
The challenge is to use a two-photon laser with a relatively low power laser.
Sensitive two-photon absorption optical information that can induce absorption
Information recording media, resulting from two-photon absorption
The energy of the excited state is linked to physical and chemical changes.
A two-photon absorption optical information recording medium for easy attachment
2 lights that are not particularly fluorescent
A child-absorbing optical information recording medium is provided. [0004] [Means for Solving the Problems] The present inventors have intensively studied.
As a result, compounds that efficiently absorb two-photons and their excitation
Compound having function for effective use of energy
Paying attention to the importance of using
The title is solved by the following two-photon absorption optical information recording medium.
I found out that it was decided. (1) Two-photon absorption cross section is 10²GM (1GM = 1 × 10)^-50cm^Four
 s molecule^-1 photon^-12) photon absorbing compound
And two-photon absorption characterized by containing a fluorescence quencher
Optical information recording medium. (2) In (1) characterized by containing a polymer binder
The two-photon absorption optical information recording medium described. (3) The polymer binder is crosslinked with a crosslinking agent.
Two-photon absorption optical information as described in (1) or (2)
recoding media. (4) The two-photon absorption compound is represented by the following general formulas (1) to (5)
Characterized in that it is at least one of the compounds represented
Two-photon absorption optical information according to any one of (1) to (3)
recoding media. (5) The fluorescent quencher is selected from the group of strong electron-accepting compounds
Characterized in that it is at least one of the selected compounds
The two-photon absorption optical information record according to any one of (1) to (4)
Recording media. [0005] DETAILED DESCRIPTION OF THE INVENTION Two-photon absorption optical information of the present invention.
The aspect of the recording medium will be described in detail below. Two-photon of the present invention
Sensitive only to strong light used for absorption optical information recording media
Explain the working principle of the composition that functions in response.
The When the material hits the light, it usually corresponds to one photon.
Ghee is absorbed. The wavelength at which this one-photon absorption does not occur
Even if it is light, if the intensity is very strong, the photon energy
Two photons whose sum is equivalent to the excitation energy are absorbed simultaneously
May be. Two lights indicating the ease of two-photon absorption
The absorption cross section is usually very small, 1GM (however, 1GM = 1 × 10
^-50cm^Fours mole cule^-1 photon^-1However, in recent years
A relatively large two-photon absorption cross section of about one hundred to several thousand GM
A substance exhibiting the above has also been found. Use such substances
Even with light in the wavelength range where there is no light absorption band, high power laser
If a very strong light source such as
Absorbs energy. For example, the absorption maximum wave of one photon at 400 nm
800nm wavelength for compounds that show long and no absorption band at 800nm
400nm light by irradiating with high power laser
An excited state close to the excited state that occurs when irradiated with
be able to. If this compound is excited with 400nm light
If, for example, it emits 430 nm fluorescence, it will absorb 800 nm light.
Even when collected, it emits fluorescence at 430 nm. 430nm light
If a compound that absorbs 460nm and emits fluorescence at 460nm coexists,
460nm fluorescence is emitted by irradiation of 00nm high power laser
To do. If the laser beam is squeezed with a lens,
Near the focal point where the photon density is high instead of the whole road emitting light
With a three-dimensional position selection system that emits fluorescence only in
There is a feature that can be given. Instead of fluorescent compounds
Polymerization initiator and polymerizable monomer or polymerizable oligo
If mixed with a polymer, polymerization occurs only near the focal point.
Can make a solid polymer of any shape
Can do. The intensity of the focused laser beam is
Two-photon excitation because it decreases with distance from the center
The part with sufficient light intensity is less than the beam diameter.
First, it becomes about 1 / √2 times, that is, about 0.7 times. Shi
Therefore, it is finer than the minimum value of the beam diameter determined by the wavelength of light.
Has the advantage of being able to excite only certain regions
The The composition used in the present invention thus performs its function.
To do. However, to the extent that it can meet the objectives of the present invention,
Moreover, two-photon absorption of coexisting materials such as binders and supports
In order for two-photon absorption to occur more efficiently, two-photon absorption is interrupted.
For convenience, the area is GM (Goeppert-Mayers units, ie 1
× 10^-50cm^Fours molecule^-1 photon^-1) As a unit
And 100GM or more (preferably 1,000,000,
000GM or less), more preferably
Is more than 1,000GM, particularly preferably 100,000
GM to 1,000,000,000 GM. Examples of two-photon absorption compounds used in the present invention
As described in the literature cited in the above prior art
In addition to the compounds represented by the following general formulas (1) to (5)
Things. General formula (1) [0008] [Chemical 1] Where R¹, R²And R^FourAre placed independently
Substituted and unsubstituted alkyl groups, substituted and unsubstituted alkyl
Kenyl, substituted and unsubstituted alkynyl, substituted and
Selected from an unsubstituted aryl group and a heterocyclic group
Represents a group. R^FiveRepresents a substituent, h represents an integer of 0 to 4, h
When R is an integer greater than or equal to 2, multiple R^FiveAre the same
They may be different and may be joined together to form a ring.
Yes. R⁶Represents a substituent on two benzene rings, j is 0-6
And when j is an integer of 2 or more, multiple R⁶Is
Each may be the same or different,
A ring may be formed. R⁷On the benzene ring attached to N
Represents a substituent, i represents an integer of 0 to 0, and i is an integer of 2 or more.
For numbers, multiple R⁷May be the same or different
Or may be linked to each other to form a ring. R⁸Hachi
P represents an integer from 0 to 2, and p is 2.
When multiple R⁸May be the same or different.
They may be linked together to form a ring. m is an integer from 0 to 5
Represents. X^Y-Represents a Y-valent organic or inorganic anion,
Y represents an integer of 1 to 5. ) General formula (2) [0010] [Chemical 2] (Wherein R¹, R², R^FourAnd R⁹Are independent
Substituted and unsubstituted alkyl groups, substituted and unsubstituted
Alkenyl groups, substituted and unsubstituted alkynyl groups, substituted
Or an unsubstituted aryl group or heterocyclic group
Represents a group. R^FiveAnd R^TenRepresents a substituent, h and k
Each independently represents an integer from 0 to 4, and h and k are 2 or more
Multiple integers^FiveAnd R^TenAre the same
May be different from each other or may be linked together to form a ring.
Good. R⁶Represents a substituent, j represents an integer of 0 to 6, and j is
When an integer is 2 or more, multiple R⁶Are the same or different
May be connected to each other to form a ring.
Yes. m and n each independently represents an integer of 0 to 5, R¹¹
And R¹²Each represents a substituent on the methine group, and s and
And t each independently represents an integer of 0 to 2, and s and t are 2
Multiple R¹¹And R¹²Are the same or different
They may also be connected to each other to form a ring. X^Y-
Represents a Y-valent organic or inorganic anion, and Y is an integer from 1 to 5.
Represents a number. General formula (3) [0012] [Chemical 3] (Wherein R¹Is substituted and unsubstituted alkyl
Groups, substituted and unsubstituted alkenyl groups, substituted and unsubstituted
Substituted alkynyl groups, substituted and unsubstituted aryl groups, and
And a group selected from a heterocyclic group. R¹³And R¹⁴Is
Each independently substituted and unsubstituted alkyl groups, substituted and unsubstituted
And unsubstituted alkenyl groups, substituted and unsubstituted alkyl
Nyl groups, substituted and unsubstituted aryl groups, and hetero
Represents a group selected from cyclic groups. R^FiveRepresents a substituent, h is 0 to
Represents an integer of 4 and when h is an integer of 2 or more, multiple R^FiveIs
Each may be the same or different,
A ring may be formed. R⁶Represents a substituent, and j is an integer from 0 to 6.
Represents a number, and when j is an integer of 2 or more, a plurality of R⁶Is it
Each may be the same or different, and connected to each other to form a ring
It may be formed. R⁸Represents a substituent on the methine group and p is 0
Represents an integer of ~ 2m, and when p is 2 or more, multiple R⁸Is that
They may be the same or different, and are linked together to form a ring.
You may make it. m represents an integer of 0 to 5. ) General formula (4) [0014] [Formula 4] (Wherein R¹Is substituted and unsubstituted alkyl
Groups, substituted and unsubstituted alkenyl groups, substituted and unsubstituted
Substituted alkynyl groups, substituted and unsubstituted aryl groups, and
And a group selected from a heterocyclic group. R^FiveAnd R^TenIs
Represents a substituent, h and k each independently represents an integer of 0 to 4
Multiple h when k and h are integers greater than or equal to 2^FiveAnd
And R^TenMay be the same or different, and
They may be linked to form a ring. R⁶Represents a substituent and j is 0
Represents an integer of ~ 6, and when j is an integer of 2 or more, multiple R⁶
May be the same or different, and
To form a ring. m and n are each independently 0 to 5
Represents an integer of R¹¹ And R¹²Represents a substituent, s and
t each independently represents an integer of 0-2n, 0-2m, s and
Multiple t when t is 2 or more¹¹And R¹²Are the same
They may be different and may be joined together to form a ring.
Yes. ) General formula (5) [0016] [Chemical formula 5] Where R¹³And R¹⁴Are each independently replaced
And unsubstituted alkyl groups, substituted and unsubstituted alk
Nyl groups, substituted and unsubstituted alkynyl groups, substituted and
A group selected from an unsubstituted aryl group and a heterocyclic group
Represents. R⁶Represents a substituent, j represents an integer of 0 to 6, and j represents
For integers greater than 1, multiple R⁶Are the same or different
May be connected to each other to form a ring.
Yes. R⁸Represents a substituent on the methine group, and p represents an integer of 0 to 2 m.
Multiple p when p is 2 or more⁸Are the same or different
May be connected to each other to form a ring.
Yes. m represents an integer of 0 to 5. R¹⁵Is substituted or unsubstituted
Represents a heterocyclic group. ) Specific examples of the two-photon absorption compound are given below.
However, the scope of the present invention is not limited only by these.
Absent. [0019] [Chemical 6][0020] [Chemical 7][0021] [Chemical 8][0022] [Chemical 9][0023] Embedded image A compound having a large two-photon absorption cross section is a two-photon.
It tends to be in an excited state, but for the purpose of its excitation energy
It is necessary to devise a way to make it easier to use. For example, two lights
Two-photon absorption when starting polymerization by photon excitation
Excited state formed by excitation of a compound with a large cross section
If the ability to initiate polymerization is low, the polymerization initiation efficiency will be low.
End up. Therefore, compounds with a large two-photon absorption cross section
Designed to have a high polymerization initiation capacity when excited
Or a compound with a large two-photon absorption cross section is excited.
Is excited to accept the excited state energy
Such as imparting high polymerization initiation ability to
is necessary. Also suitable polymer binder, solvent, plasticizer
The properties of the two-photon absorption compound, such as liquid
It can be solid or solid or the viscosity can be adjusted
Yes. Therefore, the two-photon absorption optical information recording medium of the present invention
In a preferred embodiment of the body, various functional compounds are
It can be used in combination with a compound having a large absorption cross section. The fluorescence quencher used in the present invention is a two-photon.
Deactivate the excited state of absorbing compounds by some mechanism
A compound. For example, (1) Excited state of two-photon absorption compound
Excited by energy transfer from the
Compound that does not emit light, (2) Excited state of two-photon absorption compound
When electrons are injected into the excited electrons,
Compound that inhibits return, or (3) Two-photon absorption compound
By accepting electrons from the excited state of the object,
Such as compounds that inhibit light from returning to its original state.
The In (1), from the excited state of the two-photon absorbing compound
To be excited by energy transfer, the so-called Foelst
The two lights that are requirements for er-type energy transfer to occur
Fluorescence spectrum of photoabsorption compound and its visible fluorescence
The absorption spectrum of the compound overlaps in a certain wavelength range.
And is preferably 1 of these compounds
The photon excitation energy is the one-photon excitation energy of the two-photon absorption compound.
It must be smaller than energy. In (2)
To be able to inject electrons into the excited state of a two-photon absorption compound
Is the energy level of the highest occupied orbital of a two-photon absorbing compound
It is preferable to have a higher energy occupied orbit
Yes. In (3), from the excited state of the two-photon absorbing compound
In order to be able to accept a child, the lowest air gauge of a two-photon absorbing compound
Has a lower energy orbit than the energy level of the road
It is preferable. Even compounds that fluoresce alone
Combines virtually no harmful fluorescence
You can make a situation. For example, Foelster energy
-Combining compounds that meet the requirements for migration to occur
Repeat energy transfer in multiple stages
The compound excited at the final stage of the chain is the two-photon absorption formula
Wavelength range that does not substantially hinder the function of optical information recording media
If the fluorescent light is emitted in the region, a substantially non-fluorescent state can be obtained.
Can be achieved. As the fluorescence quencher used in the present invention,
Various things can be used. The two-photon absorption compound
As a compound that can accept the excitation energy of
It is a requirement for the Foelster energy transfer to occur.
The fluorescence spectrum of the two-photon absorption compound and the visible fluorescence
In the wavelength range where the absorption spectrum of the compound emitting
It is preferable that the compound satisfies the overlapping. D
Excited singlet resulting from energy transfer is rapidly excited
Change to triplet or chemical changes such as electron transfer
Is preferred, but it causes unwanted chemical changes.
The former is more preferable because it does not. Species as fluorescent quenchers
Although there are various compound groups, typical examples
Is a group of strong electron-accepting compounds (for example, nitro compounds,
Quinones, tetracyanoquinodimethanes, aminium
, Diimmonium), strong electron donating compounds (eg
For example, hydrazines, hydrazides, hydroxylamine
, Hydroquinones, tetrasubstituted boron anions), heavy
Compound groups containing high-period elements such as metal complexes (for example,
Metallocenes such as ferrocene, bis (1,2-ben
Zendithiolato) Nickel, heavy metal complex of azo dye
, Formazan heavy metal complex, dipyrromethene metal complex
, Porphyrin heavy metal complexes, heavy metal phthalocyanine
And heavy metal naphthalocyanines)
Yes. Examples of fluorescent quenchers are given below, but are within the scope of the present invention.
Is not limited to these. [0028] Embedded image [0029] Embedded image[0030] Embedded image Two-photon absorption optical information recording medium of the present invention
Even if it contains a polymer binder and a trace amount of solvent
good. Examples of solvents include butyl acetate, ethyl lactate,
Esters such as losolve acetate; methyl ethyl ketone
T, cyclohexanone, methyl isobutyl ketone, etc.
Ketones; dichloromethane, 1,2-dichloroethane,
Halogenated hydrocarbons such as roloform; N, N-dimethyl
Amides such as formamide; dimethyl sulfoxide
Which sulfoxides, sulfolanes such as sulfolane,
Hydrocarbons such as chlorohexane and toluene; tetrahydride
Athene such as lofuran, ethyl ether, dioxane, etc.
Ru, ethanol, n-bropanol, isopropanol
Al, n-butanol, diacetone alcohol, etc.
Coals; 2,2,3,3-tetrafluorobropanol, etc.
Titanium solvents; ethylene glycol monomethyl ether,
Ethylene glycol monoethyl ether, propylene
Glycol glycol such as glycol monomethyl ether
Examples include tellurium. Use the above solvents
Single or a combination of two or more in consideration of compound solubility
Can be used. The two-photon absorption optical of the present invention
In information recording media, there are further antioxidants, UV absorbers, plastics.
Various additives such as an agent may be added depending on the purpose. As a material for the recording layer of an optical information recording medium
Use of polymer binder when using polymer binder together.
The dose is generally 0.01 to 50 times the two-photon absorption compound
(Mass ratio) in the range, preferably 0.1-5 times (mass ratio)
It is in the range. 2 in the composition thus prepared
The concentration of the photon absorbing compound is generally in the range of 0.01 to 10% by mass.
Yes, preferably in the range of 0.1 to 5% by mass. Two-photon absorption optical information recording medium of the present invention
Conventionally known thermoplastic trees are used as binders.
Fat, thermosetting resin, reactive resin, electron beam curable resin, purple
External line curable resin, visible light curable resin and mixtures thereof
Is used. Thermoplastic resin has a softening temperature of 150
° C or lower, average molecular weight is 10,000 to 300,000, polymerization
More preferably, the degree is about 50 to 2000.
0 to 700, for example, vinyl chloride vinyl acetate
Polymer, vinyl chloride copolymer, vinyl chloride vinyl acetate vinyl
Nyl alcohol copolymer, vinyl chloride vinyl alcohol
Copolymer, vinylidene chloride vinyl chloride copolymer, vinyl chloride
Nylacrylonitrile copolymer, acrylic ester
Acrylonitrile copolymer, acrylic ester vinyl chloride
Redene copolymer, acrylic ester styrene copolymer
Body, methacrylic ester acrylonitrile copolymer,
Methacrylic acid ester vinylidene chloride copolymer,
Rylate styrene copolymer, urethane elastomer
-, Nylon-silicone resin, nitrocellulose low
Lyamide resin, polyvinyl chloride, vinylidene chloride
Lilyonitrile copolymer, butadiene acrylonitrile copolymer
Polymer, polyamide resin, polyvinyl butyral, cell
Loose derivatives (cellulose acetate butyrate, cell
Loose Diacetate, Cellulose Triacetate, Set
Roulose propionate, nitrocellulose, ethyl acetate
Loose, methyl cellulose, propyl cellulose,
Tilethyl cellulose, carboxymethyl cellulose,
Acetyl cellulose, etc.), styrene butadiene copolymer
Body, polyester resin, polycarbonate resin, chloro
Vinyl ether acrylate copolymer, amino tree
Fats, various synthetic rubber thermoplastic resins and their mixtures
Things are used. As the thermosetting resin or reactive resin,
In the state of the coating solution, the molecular weight is 200,000 or less.
Condensation, addition, etc. by heating and humidifying the cloth after drying
The molecular weight is infinite by the reaction. Also these
Among the resins, they soften or dissolve before the resin is thermally decomposed.
Those that do not melt are preferred. Specifically, for example, phenol
Resin, phenoxy resin, epoxy resin, polyurethane resin
Fat, polyester resin, polyurethane polycarbonate
Resin, urea resin, melamine resin, alkyd resin, silica
Con resin, acrylic reaction resin (electron beam curable resin),
Poxy-polyamide resin, nitrocellulose melamine tree
Fat, high molecular weight polyester resin and isocyanate prepo
Mixture of limer, methacrylate copolymer and diisocyanate
Neat prepolymer mixture, polyester polyol
And polyisocyanate, urea formaldehyde
Resin, low molecular weight glycol / high molecular weight diol / tri
A mixture of phenylmethane triisocyanate, polyamid
Resin, polyimine resin, and a mixture thereof.
These thermoplastic, thermosetting resins and reactive resins are the main
Besides functional groups, carboxylic acids (COOM),
Rufinic acid, sulfenic acid, sulfonic acid (SO_ThreeM),
Phosphoric acid (PO (OM) (OM)), phosphonic acid, sulfuric acid (O
SO_ThreeM), and acidic groups such as these ester groups (M is
H, alkali metal, alkaline earth metal, hydrocarbon group),
Amino acids, aminosulfonic acids, amino alcohols
Sulfuric acid or phosphate esters, sulfobetaine, phospho
Amphoteric groups such as betaines and alkylbetaines, amino
Group, imino group, imide group, amide group, etc.
Lucoxyl group, thiol group, alkylthio group, halogen
Groups (F, Cl, Br, I), silyl groups, siloxane groups,
Epoxy group, isocyanato group, cyano group, nitrile group,
Usually one or more oxo, acryl and phosphine groups
Including up to 6 types, each functional group is 1 x 10 per gram of resin
^-6eq ~ 1 × 10^-2It is preferable to include eq. These bars
Inder alone or in combination is used.
Additives are added. Two-photon absorption optical information of the present invention
The mixing ratio of the recording medium and the binder is a two-photon absorption by mass ratio.
Vine with respect to 100 parts by mass of the collecting optical information recording medium
It is preferably used in the range of 5 to 50000 parts by mass
Good. Additives such as dispersants, lubricants, antistatic agents, acids
Add anti-oxidation agent, antifungal agent, coloring agent, solvent, etc. as necessary
May be. As an example of a preferred polymer binder,
Also described in JP-A-11-221963 and JP-A-2000-48411
Cyclohexane dimethanol-based polyester poly
A urethane resin is mentioned. A two-photon absorption optical information recording medium is not
Addition of cross-linking agent to crosslink polymer binder to improve shape stability.
Or it is preferable to improve the adhesiveness to a support body. Cross-linking
Examples of the agent include a hydroxyl group, an amino group, and an amine in a polymer binder.
Or a functional group having an active hydrogen atom such as a carboxyl group
A compound having a plurality of groups is preferred. For example, Polyalde
Hydride, polyacid halide, polyanhydride, polyvinylsulfide
Hong, cyanuric chloride derivative, polyisocyanate
And so on. Of these, particularly preferred polyi
As the soyate, tolylene diisocyanate,
4,4'-diphenylmethane diisocyanate, hexa
Methylene diisocyanate, xylylene diisocyanate
Naphthylene-1,5-diisocyanate, o-tolu
Idin diisocyanate, isophorone diisocyanate
Triphenylmethane triisocyanate, isophor
Isocyanates such as diisocyanates and the like
Products of cyanates and polyalcohols, and isocyanates
Polymer of 2 to 10 mer formed by condensation of the nets
Socynate, polyisocyanate and polyurethane
Products whose terminal functional group is isocyanate, etc.
Can be used. Of these polyisocyanates
The average molecular weight is preferably from 100 to 20000.
These polyisocyanates are commercially available as trade names.
Coronate L, Coronate HL, Coronate 20
30, Coronate 2031, Millionate MR, Million
Net MTL (Nippon Polyurethane Co., Ltd.), Takenet D
-102, bamboo D-110N, bamboo D-2
00, bamboo D-202, bamboo 300S,
Kenate 500 (manufactured by Takeda Pharmaceutical Co., Ltd.), Sumijour T-8
0, Sumijuru 44S, Sumijoule PF, Sumiju
-L, Sumijour N Death Module L, Death Mod
-IL, Death module N, Death module HL,
Sum module T65, Death module 15, Death module
-R, Death module RF, Death module SL,
There is a module Z4273 (manufactured by Sumitomo Bayer)
These can be used alone or by utilizing the difference in curing reactivity.
Use with one or more combinations
Can do. In addition, for the purpose of accelerating the curing reaction,
Tandiol, hexanediol, molecular weight 1000 to 1000
10,000 polyurethanes, water, etc.), amino groups (monomers)
Tilamine, dimethylamine, trimethylamine, etc.)
Compounds and metal oxide catalysts and iron acetylacetone
A catalyst such as a salt can be used in combination. These hydroxyl groups and
The compound having an amino group is desirably polyfunctional.
These polyisocyanates are two-photon absorption optical information recordings.
Total amount of polymer binder and polyisocyanate in the recording medium
It is preferable to use 2 to 70 parts by mass per 100 parts by mass.
More preferably, it is 5 to 50 parts by mass. [0037] The present invention will be described more specifically with reference to the following examples.
Light up. The components, ratios, operation order, etc. shown here are
It can be changed without departing from the spirit
Is easy to understand for those in the industry
That is. Therefore, the present invention is limited by the following examples.
Should not be done. In addition, the part in an Example represents a mass part.
The [Example 1] Example of optical information recording medium 1 part of two-photon absorption compound (14) Fluorescence quencher (Q5) 10 parts 200 parts of binder (MR110T made by ZEON) Binder (Toyobo UR-5500 30%) 280 parts Diluent (methyl ethyl ketone / cyclohexanone = 2 /
1) 5000 copies 100 parts of cross-linking agent (Coronate 3041 50%) The above was mixed to obtain a uniform transparent liquid composition. This composition
Is applied to a glass plate and dried to create an optical information recording medium.
did. This recording medium has an absorption band in the near infrared region around 780 nm.
I didn't have it. This has a wavelength of 780nm and an average power of 10mW
Peak power 5kw, pulse width 100fs, repetition rate 48MHz
When the laser is irradiated, the refractive index changes in the irradiated area.
Observed. That is, by absorption of near-infrared laser light.
It can be seen that a change has occurred. UV coating
But the fluorescent color as remarkable as Comparative Example 2 was recognized.
I couldn't. [Example 2] Two-photon absorption in Example 1
Instead of the compound (14), a two-photon absorption compound (16) is used.
Use a fluorescence quencher (Q6) instead of a fluorescence quencher (Q5)
An optical information recording medium is used in the same manner as in Example 1 except that it is used.
Created. This recording medium absorbs in the near infrared region around 780nm
I did not have a belt. This has a wavelength of 780nm and an average power of 10
mW peak power 5kw, pulse width 100fs, repetition frequency 48
When irradiated with MHz laser, the refractive index at the irradiated area
Changes were observed. That is, absorption of near-infrared laser light
Shows that a change has occurred. This coating is ultraviolet
Although the line lamp was irradiated, the remarkable fluorescent color as in Comparative Example 2
I was not able to admit. [Comparative Example 1] In Example 1, the two-photon absorption compound (1
Liquid composition as in Example 1 except that 4) is not added
Got. This was applied to a glass plate in the same manner as in Example 1 and dried.
The laser was irradiated, but the refractive index in the irradiated area changed.
No near-infrared laser light is changed.
It turns out that it does not absorb enough. UV rays on this coating
Although the lamp was irradiated, the remarkable fluorescent color as in Comparative Example 2 was recognized.
It did not fit. [Comparative Example 2] Fluorescence quencher in Example 1
A liquid composition was obtained in the same manner as in Example 1 except that was not added.
It was. This was applied to a glass plate in the same manner as in Example 1 and dried,
Although the laser was irradiated, the change in the refractive index in the irradiated area
It was observed that the entire coating film was exposed to the UV lamp.
A fluorescent color was observed with the naked eye. [0041] The two-photon absorption optical information recording medium of the present invention.
The body changes due to two-photon absorption and at the same time generates fluorescence
Has a favorable effect that is significantly suppressed
Understand.

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Claims (1)

[Claims] 1. The two-photon absorption cross section is 10²GM (1GM = 1 ×
Ten^-50cm^Fours molecule ^-1 photon^-12) Two-photon absorption
2 containing a collecting compound and a fluorescence quencher
Photon absorption optical information recording medium.