JPH0477908B2 - - Google Patents

Description

[Detailed description of the invention]

INDUSTRIAL APPLICATION FIELD The present invention relates to an electrophotographic photoreceptor using a new electrophotographic photosensitive material, and more specifically to a highly sensitive electrophotographic photoreceptor containing a cyanine dye having a specific molecular structure in a photoconductive layer. This invention relates to an electrophotographic photoreceptor using a photosensitive material. BACKGROUND ART Conventionally, pigments and dyes exhibiting photoconductivity have been published in numerous publications. For example, “RCA Review” Vol.23, P.413~
P.419 (September 1962), there was a presentation on the photoconductivity of phthalocyanine pigments, and electrophotographic photoreceptors using this phthalocyanine pigment were shown in U.S. Pat. No. 3,397,086, U.S. Pat. No. 3,816,118, etc. ing. In addition, as organic semiconductors used in electrophotographic photoreceptors, for example, US Pat.
4315983, U.S. Patent No. 4327169 and “Reseach Disclosure” 20517 (May 1981), pyrylium dyes, U.S. Patent No. 3824099, methine squaritate dyes, U.S. Patent No. 3898084 Publication, U.S. Patent No.
Examples include disazo pigments disclosed in Publication No. 4251613 and the like. Such organic semiconductors are easier to synthesize than inorganic semiconductors, and can be synthesized as compounds that have photoconductivity for light in the required wavelength range. An electrophotographic photoreceptor formed on a conductive support has the advantage of improved color sensitivity, but only a few of them are practical in terms of sensitivity and durability. Problems to be Solved by the Invention The present inventors have completed the present invention as a result of intensive research aimed at improving the various drawbacks of organic semiconductor materials and obtaining a photoconductive material with excellent electrophotographic properties. The first object of the present invention is to provide a novel organic semiconductor coating. A second object of the present invention is to provide an electrophotographic photoreceptor that can be used in all existing electrophotographic processes, improves the conventional drawbacks, and provides higher electrophotographic response gain. Means for Solving the Problems The photoreceptor of the present invention is characterized in that a photoconductive layer comprising a cyanine dye represented by the general formula () and a resin is provided on a conductive support. . [In the formula, k, l, m, and n represent integers selected from 0, 1, and 2, and and ZY is a 5- to 6-membered heterocycle that may have a substituent or a 5- to 6-membered heterocycle fused with an aromatic ring such as benzene or naphthalene that may have a substituent. Represents a residue. in particular

【formula】

【formula】

【formula】

【formula】

【formula】

【formula】

【formula】

【formula】

【formula】

[Formula] etc. (In the formula, A is O, S, Se, N-R ₉

_{[ Formula : _ _ _} This represents an aliphatic group such as chloro, bromo, or a halogen group. ) Q represents a phenyl group, a naphthyl group, an anthranyl group, a furan group, a thiophene group, or a pyrrole group, which may be substituted. ] Specific examples of the cyanine dye represented by the above general formula are shown below. The cyanine dye having the above structure does not limit the scope of the claims of the present invention. These cyanine dyes can be synthesized by methods known in the literature. Namely, Zh.Org.Kim, 1968, 4, 1089-94,
It can be obtained by applying the method described in 2207-12. For example, compound (1) can be obtained as follows. Compound (28) can be obtained by the following synthetic route The coating containing the cyanine compound described above exhibits photoconductivity and can therefore be used in the photosensitive layer of the electrophotographic photoreceptor described below. That is, in a specific example of the present invention, an electrophotographic photoreceptor is prepared by forming a film of the above-mentioned cyanine compound on a conductive support by a vacuum evaporation method, or by dispersing and containing the cyanine compound in a suitable binder to form a film. can do. In a preferred embodiment of the present invention, the photoconductive coating described above can be applied as a charge generation layer in an electrophotographic photoreceptor in which the photosensitive layer is functionally separated into a charge generation layer and a charge transport layer. The charge generation layer contains as much of the above-mentioned photoconductive compound as possible in order to obtain sufficient absorbance, and is a thin film layer, for example, 5μ or less, in order to shorten the range of the generated charge carriers. Preferably
A thin film layer having a thickness of 0.01 to 1 μm is preferable. This means that most of the incident light is absorbed by the charge generation layer, generating many charge carriers, and that the generated charge carriers are not deactivated by recombination or trapping, but are transferred to the charge transport layer. This is due to the need for injection. The charge generation layer can be formed by dispersing the above-mentioned compound in a suitable binder and coating it on the substrate, or it can be obtained by forming a vapor deposited film using a vacuum vapor deposition apparatus. . The binder that can be used when forming the charge generation layer by coating can be selected from a wide range of insulating resins.
It can also be selected from organic photoconductive polymers such as poly-N-vinylcarbazole, polyvinylanthracene and polyvinylpyrene. Preferably, polyvinyl butyral, polyarylate (condensation polymer of bisphenol A and phthalic acid, etc.), polycarbonate, polyester, phenoxy resin, polyvinyl acetate, acrylic resin, polyacrylamide resin, polyamide, polyvinylpyridine, cellulose resin, urethane. Examples include insulating resins such as resin, epoxy resin, casein, polyvinyl alcohol, and polyvinylpyrrolidone. The resin contained in the charge generation layer is suitably 80% by weight or less, preferably 40% by weight or more. The solvent that dissolves these resins varies depending on the type of resin, and is preferably selected from those that do not dissolve the charge transport layer or undercoat layer described below. Specific organic solvents include alcohols such as methanol, ethanol, and isopropanol, ketones such as acetone, methyl ethyl ketone, and cyclohexanone, N,N-dimethylformamide,
Amides such as N,N-dimethylacetamide,
Sulfoxides such as dimethyl sulfoxide, ethers such as tetrahydrofuran, dioxane, and ethylene glycol monomethyl ether, esters such as methyl acetate and ethyl acetate, aliphatic halogens such as chloroform, methylene chloride, dichloroethylene, carbon tetrachloride, and trichloroethylene. Hydrocarbons or aromatics such as benzene, toluene, xylene, ligroin, monochlorobenzene, dichlorobenzene, etc. can be used. Coating can be carried out using coating methods such as dip coating, spray coating, spinner coating, bead coating, Meyer bar coating, blade coating, roller coating, and curtain coating. For drying, it is preferable to dry to the touch at room temperature and then heat dry. Heat drying at a temperature of 30℃ to 200℃ for 5 minutes to 2
It can be carried out stationary or under blown air for a period of time within a range of hours. The charge transport layer is electrically connected to the charge generation layer described above, and has the function of receiving charge carriers injected from the charge generation layer in the presence of an electric field and transporting these charge carriers to the surface. ing. At this time, this charge transport layer may be laminated on or under the charge generation layer. The substance that transports charge carriers in the charge transport layer (hereinafter simply referred to as charge transport substance) is preferably substantially insensitive to the wavelength range of electromagnetic waves to which the charge generation layer is sensitive. The term "electromagnetic waves" used herein includes a broad definition of "light rays" that includes gamma rays, X-rays, ultraviolet rays, visible light, near infrared rays, infrared rays, far infrared rays, and the like. When the photosensitive wavelength range of the charge transport layer coincides with or overlaps that of the charge generation layer, charge carriers generated in both trap each other, resulting in a decrease in sensitivity. Charge transport substances include electron transport substances and hole transport substances, and electron transport substances include chloranil, bromoanil, tetracyanoethylene, tetracyanoquinodimethane, and 2,4,7-trinitro-9-fluorenone. , 2, 4, 5, 7-
Tetranitro-9-fluorenone, 2,4,7-
trinitro-9-dicyanomethylenefluorenone, 2,4,5,7-tetranitroxanthone,
Examples include electron-withdrawing substances such as 2,4,8-trinitrothioxanthone, and polymerization of these electron-withdrawing substances. Examples of hole-transporting substances include pyrene, N-ethylcarbazole, N-isopropylcarbazole,
N-Methyl-N-phenylhydrazino-3-methylidene-9-ethylcarbazole, N,N-diphenylhydrazino-3-methylidene-9-ethylcarbazole, N,N-diphenylhydrazino-
3-methylidene-10-ethylphenothiazine,
N,N-diphenylhydrazino-3-methylidene-10-ethylphenoxazine, P-diethylaminobenzaldehyde-N,N-diphenylhydrazone, P-diethylaminobenzaldehyde-N
-α-Naphthyl-N-phenylhydrazone, P-
Pyrrolidinobenzaldehyde-N,N-diphenylhydrazone, 1,3,3-trimethylindolenine-ω-aldehyde-N,N-diphenylhydrazone, P-diethylbenzaldehyde-3-methylbenzthiazolinone-2-hydrazone hydrazones such as 2,5-bis(P-diethylaminophenyl)-1,3,4-oxadiazole, 1
-Phenyl-3-(P-diethylaminostyryl)
-5-(P-diethylaminophenyl)pyralizone, 1-[quinolyl(2)]-3-(P-diethylaminostyryl)-5-(P-diethylaminophenyl)pyrazoline, 1-[pyridyl(2)]- 3-(P-
diethylaminostyryl)-5-(P-diethylaminophenyl)pyrazoline, 1-[6-methoxy-pyridyl(2)]-3-(P-diethylaminostyryl)-5-(P-diethylaminophenyl)pyrazoline, 1- [Pyridyl(3)]-3-(P-diethylaminostyryl)-5-(P-diethylaminophenyl)pyrazoline, 1-[Lepidyl(2)]-3-(P-
diethylaminostyryl)-5-(P-diethylaminophenyl)pyrazoline, 1-[pyridine(2)]-
3-(P-diethylaminostyryl)-4-methyl-5-(P-diethylaminophenyl)pyrazoline, 1-[pyridyl(2)]-3-(α-methyl-P-
diethylaminostyryl)-5-(P-diethylaminophenyl)pyrazoline, 1-phenyl-3-
(P-diethylaminostyryl)-4-methyl-5
-(P-diethylaminophenyl)pyrazoline,
1-Phenyl-3-(α-benzyl-P-diethylaminostyryl)-5-(P-diethylaminophenyl)pyrazoline, spiropyrazoline and other pyrazolines, 2-(P-diethylaminostyryl)
-6-diethylaminobenzoxazole, 2-
Oxazole compounds such as (P-diethylaminophenyl)-4-(P-dimethylaminophenyl)-5-(2-chlorophenyl)oxazole, 2
Thiazole compounds such as -(P-diethylaminostyryl)-6-diethylaminobenzothiazole, triarylmethane compounds such as bis(4-diethylamino-2-methylphenyl)-phenylmethane, 1,1-bis(4-N,N -diethylamino-2-methylphenyl)heptane, 1,
Polyarylalkanes such as 1,2,2-tetrakis(4-N,N-dimethylamino-2-methylphenyl)ethane, triphenylamine, poly-
N-vinylcarbazole, polyvinylpyrene, polyvinylanthracene, polyvinylacridine,
Examples include poly-9-vinylphenylanthracene, pyrene-formaldehyde resin, and ethylcarbazole formaldehyde resin. In addition to these organic charge transport materials, inorganic materials such as selenium, selenium-tellurium amorphous silicon, and cadmium sulfide can also be used. Moreover, these charge transport substances may be one or two types.
More than one species can be used in combination. When the charge transport material does not have film-forming properties,
A film can be formed by selecting an appropriate binder. Resins that can be used as binders are:
For example, insulating resins such as acrylic resin, polyarylate, polyester, polycarbonate, polystyrene, acrylonitrile-styrene copolymer, acrylonitrile-butadiene copolymer, polyvinyl butyral, polyvinyl formal, polysulfone, polyacrylamide, polyamide, chlorinated rubber, or poly-N- Mention may be made of organic photoconductive polymers such as vinylcarbazole, polyvinylanthracene, polyvinylpyrene. Since the charge transport layer has a limit in its ability to transport charge carriers, it cannot be made thicker than necessary. Generally, it is 5-30μ, but the preferred range is 8-20μ. When forming the charge transport layer by coating, an appropriate coating method as described above can be used. A photosensitive layer having such a laminated structure of a charge generation layer and a charge transport layer is provided on a substrate having a conductive layer. As the substrate having the conductive layer, materials that are themselves conductive can be used, such as aluminum, aluminum alloy, copper, zinc, stainless steel, vanadium, molybdenum, chromium, titanium, nickel, indium, gold, and platinum. In addition, plastics (such as polyethylene, polypropylene, polyvinyl chloride, polyethylene terephthalate, acrylic, resin, polyethylene fluoride, etc.), conductive particles (e.g. carbon black,
A substrate made of plastic coated with silver particles (silver particles, etc.) together with a suitable binder, a substrate made of plastic or paper impregnated with conductive particles, a plastic containing a conductive polymer, etc. can be used. A subbing layer having barrier and adhesive functions can also be provided between the conductive layer and the photosensitive layer. The subbing layer is made of casein, polyvinyl alcohol, nitrocellulose, ethylene-acrylic acid copolymer, polyamide (nylon 6, nylon 66, nylon
610, copolymerized nylon, alkoxymethylated nylon, etc.), polyurethane, gelatin, aluminum oxide, etc. The thickness of the undercoat layer is 0.1 to 5μ, preferably 0.5 to 3μ.
is appropriate. When using a photoreceptor in which a conductive layer, a charge generation layer, and a charge transport layer are laminated in this order, and the charge transport material is an electron transport material, the surface of the charge transport layer must be positively charged, and exposure after charging is required. Then, in the exposed area, electrons generated in the charge generation layer are injected into the charge transport layer, and then reach the surface and neutralize the positive charge, causing a decrease in surface potential and creating an electrostatic contrast with the unexposed area. . A visible image can be obtained by developing the electrostatic latent image thus formed with a negatively charged toner. This can be directly fixed, or the toner image can be transferred to paper, plastic film, etc. and then developed and fixed. Alternatively, a method may be used in which the electrostatic latent image on the photoreceptor is transferred onto an insulating layer of transfer paper, then developed and fixed. The type of developer, the developing method, and the fixing method may be any known ones or known methods, and are not limited to specific ones. On the other hand, when the charge transport material consists of a hole transport material, the surface of the charge transport layer must be negatively charged.
After charging, when exposed to light, holes generated in the charge generation layer in the exposed area are injected into the charge transport layer, and then reach the surface and neutralize the negative charge, causing a decrease in surface potential and static electricity between the exposed area and the unexposed area. Electrocontrast occurs. During development, it is necessary to use a positively charged toner, contrary to the case where an electron transporting substance is used. When using a photoreceptor in which a conductive layer, a charge transport layer, and a charge generation layer are laminated in this order, and the charge transport material is an electron transport material, it is necessary to charge the surface of the charge generation layer negatively, and when exposed to light after charging, In the exposed area, electrons generated in the charge generation layer are injected into the charge transport layer and then reach the substrate, while holes generated in the charge generation layer reach the surface and the surface potential attenuates, creating an electrostatic charge between it and the unexposed area. Contrast occurs. A visible image can be obtained by developing the electrostatic latent image thus formed with a positively charged toner. This can be directly fixed, or the toner image can be transferred to paper, plastic film, etc. and then developed and fixed. Alternatively, a method may be used in which the electrostatic latent image on the photoreceptor is transferred onto an insulating layer of transfer paper, then developed and fixed. The type of developer, the developing method, and the fixing method may be any known ones or known methods, and are not limited to specific ones. On the other hand, when the charge transport material consists of a positive hole transport material, it is necessary to charge the surface of the charge generation layer positively, and when exposed to light after charging, the holes generated in the charge generation layer are injected into the charge transport layer in the exposed area. After that, the electrons generated in the charge generation layer reach the substrate, and the surface potential attenuates, creating an electrostatic contrast with the unexposed area. During development, it is necessary to use a negatively charged toner, contrary to the case where an electron transporting substance is used. In another specific example of the present invention, organic photoconductive materials such as the aforementioned hydrazones, pyrazolines, oxazoles, thiazoles, triarylmethanes, polyarylalkanes, triphenylamines, poly-N-vinylcarbazoles, etc. The photosensitive film may contain the above-mentioned cyanine compound as a sensitizer for photoconductive substances or inorganic photoconductive substances such as zinc oxide, cadmium sulfide, and selenium. This photosensitive film is formed by coating these photoconductive substances and the above-mentioned cyanine compound together with a binder. Further, as another specific example of the present invention, JP-A-49-
It can also be used as a type of photoreceptor in which a charge generating material is added to a charge transfer complex as disclosed in Japanese Patent No. 916483 (photoconductive member). Any photoreceptor should contain at least one cyanine compound selected from the compounds represented by the general formula (), and if necessary, other photoconductive pigments or dyes with different light absorptions may be used in combination. It is also possible to increase the sensitivity of this photoreceptor or to adjust it as a panchromatic photoreceptor. The electrophotographic photoreceptor of the present invention can be used not only for electrophotographic copying machines, but also for laser printers and CRTs.
It can also be widely used in electrophotographic applications such as printers. Hereinafter, the present invention will be explained according to examples. Examples 1 to 30 Ammonia aqueous solution of casein (11.2 g of casein, 1 g of 28% ammonia water, 222 ml of water) on an aluminum plate
was applied with a Mayer bar so that the film thickness after drying was 1.0 microns, and dried. Next, 5 g of each of the 30 types of cyanine compounds mentioned in the specific examples were added to a solution of 2 g of butyral resin (degree of butyralization: 63 mol %) dissolved in 95 ml of isopropyl alcohol to prepare 30 types of eluent. After dispersing each coating solution in a sand mill, each coating solution was coated on the casein undercoat layer using a Mayer bar so that the film thickness after drying was 0.1 μm, and dried to form a charge generation layer. Then, the structural formula 5 g of hydrazone compound and 5 g of polymethyl methacrylate resin (number average molecular weight 100,000) were added to benzene.
The solution was dissolved in 70 ml and applied onto the charge generation layer using a Mayer bar so that the film thickness after drying was 12μ, and dried to form a charge transport layer. The 30 types of electrophotographic photoreceptors prepared in this way were tested using an electrostatic copying paper tester Model SP-428 manufactured by Kawaguchi Electric Co., Ltd.
The sample was corona-charged dynamically at -5KV using a 1000V, held in a dark place for 1 second, and then exposed to light for 4 seconds at an illuminance of 5lux to examine its charging characteristics. The charging characteristics are initial charging potential (VO) and 1
The exposure amount (E1/2) required to attenuate the potential to 1/2 when dark decaying for a second was measured. The results are shown in Table 1. Further, the residual potential after 20 lux.sec exposure was expressed as _VR .

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【table】

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[Table] A photoreceptor was prepared in exactly the same manner as in Example 1 except that the above comparative compound was replaced with the cyanine compound of Example 1, and the characteristics were investigated and the results are shown in Table 2.

[Table] All comparative examples have lower sensitivity and higher residual potential than the examples. Furthermore, using the charge measuring device of Example 1, the same charge exposure operation as in Example 1 was repeated 5000 times in a dynamic manner, and the changes in the initial charging potential VO and the residual potential _VR after exposure were examined, and the results are shown in Table 3.
Note that the same measurements were performed on the photoreceptors of Examples 1, 5, 8, 27, and 30.

[Table] Corresponding to the high initial residual potential shown in Table 2, the photoreceptors of the comparative examples all had extremely high residual potentials during repeated use, and as a result, V _D was also high and lacked potential stability in practical use. This is a big problem. On the other hand, the properties of the embodiments according to the present invention are extremely stable even after repeated use, and it is obvious that they have extremely excellent properties in practical use. Practical Examples 31 to 35 A casein subbing layer was coated on an aluminum plate in the same manner as in Example 1. Next, a charge transport layer containing the hydrazone compound used in Example 1 as a charge transport substance had a film thickness of 12 μm after drying.
A charge transport layer was formed by coating with a Mayer bar and drying. Next, the coating solutions of Examples 1, 4, 11, 20, and 30 were applied onto the charge transport layer using a Meyer bar so that the film thickness after drying was 0.1μ, and dried to form a charge generation layer. did. The charging characteristics of the five types of electrophotographic photoreceptors prepared in this manner were examined in the same manner as in Example 1. In this case, it was corona charged at +5KV. The results are shown in Table 4.

[Table] Example 36 1 g of poly-N-vinylcarbazole and 5 mg of the above-mentioned cyanine compound (1) were added to 10% of 1,2-dichloroethane.
g and stirred thoroughly. The coating solution thus prepared was applied onto a polyethylene terephthalate film on which aluminum was vapor-deposited using a doctor blade so that the dry film thickness was 15 μm. The charging characteristics of this photoreceptor were measured in the same manner as in Example 1. However, the charging polarity was determined.
The results are shown below. VO: 590 E1/2: 3.0luv.sec Example 36 except that the cyanine compound (13) described above was used in place of the cyanine compound (1) used when preparing the electrophotographic photoreceptor of Example 36. After preparing a photoreceptor in exactly the same manner as described above, the charging characteristics of this photoreceptor were measured. The results are shown below. However, the charging polarity was taken into account. VO: +590 E1/2: 3.4luv.sec Example 37 Fine particle zinc oxide (Sazex2000 manufactured by Sakai Chemical Co., Ltd.) 10
g, 4 g of acrylic resin (Dyanal LR009 manufactured by Mitsubishi Rayon Co., Ltd.), 10 g of toluene, and 10 mg of the above-mentioned cyanine compound (19) were thoroughly mixed in a ball mill, and the resulting coating solution was applied to aluminum-deposited polyethylene. It was applied onto a terephthalate film using a doctor blade to a dry film thickness of 21 μm, and dried to prepare an electrophotographic photoreceptor. When the spectral sensitivity of this electrophotographic photoreceptor was measured by spectrophotography using electrophotography, it was found that compared to the zinc oxide coating that does not contain the cyanine compound mentioned above,
It was found that the photoreceptor of this example had sensitivity on the long wavelength side. Example 38 A polyvinyl alcohol film having a thickness of 1.1 microns was formed on the aluminum surface of an aluminum vapor-deposited polyethylene terephthalate film. Next, a coating liquid containing the same cyanine compound as in Example 10 was applied onto the previously formed polyvinyl alcohol layer using a Mayer bar so that the film thickness after drying was 0.1μ, dried and charged. A generation layer was formed. Then, the structural formula A solution prepared by dissolving 5 g of pyrazoline compound and 5 g of polyarylate resin (condensation polymer of bisphenol A and terephthalic acid-isophthalic acid) in 70 ml of tetrahydrofuran was applied onto the charge generation layer so that the film thickness after drying was 10 μm. , and dried to form a charge transport layer. Example 1 shows the charging characteristics of the photoreceptor thus prepared.
It was measured using the same method as above. The results are shown below. VO: -600V E1/2: 4.0luv.sec Example 39 An ammonia aqueous solution of casein was coated on an aluminum plate with a thickness of 100 μm and dried to form a subbing layer with a thickness of 1.1 μm. Next, 5 g of 2,4,7-trinitro-9-fluorenone and 5 g of poly-N-vinylcarbazole (number average molecular weight 300,000) were added to 70 ml of tetrahydrofuran.
to form a charge transfer complex. This charge transfer complex compound and 1 g of the aforementioned cyanine compound were added to a solution in which 5 g of polyester resin (Vylon, manufactured by Toyobo) was dissolved in 70 ml of tetrahydrofuran, and dispersed. This dispersion is applied onto the undercoat layer so that the film thickness after drying is
It was applied to a thickness of 12μ and dried. The charging characteristics of the photoreceptor thus prepared were measured in the same manner as in Example 1. These results were as follows. However, the charging polarity was determined. VO: +570V E1/2: 3.0luv.sec Example 40 A polyvinyl alcohol film with a thickness of 1.1 μm was formed on the aluminum surface of an aluminum vapor-deposited polyethylene terephthalate film. Next, the above-mentioned dispersion of cyanine compound (12) used in Example 12 was applied onto the polyvinyl alcohol layer formed previously using a Mayer bar so that the film thickness after drying was 0.5μ, and then dried. A charge generation layer was formed. Next, the structural formula A solution prepared by dissolving 5 g of pyrazoline compound and 5 g of polyarylate resin (condensation polymer of bisphenol A and terephthalic acid-isophthalic acid) in 70 ml of tetrahydrofuran was placed on the charge generation layer to determine the film thickness after drying.
It was applied to a thickness of 10μ and dried to form a charge transport layer. Example 1 shows the charging characteristics of the photoreceptor thus prepared.
It was measured using the same method as above. The results were as follows. VO: -610V E1/2: 4.0luv.sec Effects of the Invention According to the present invention, the characteristics after repeated use are extremely stable, and an electrophotographic photoreceptor having extremely excellent characteristics in practical use can be obtained. .

Claims (1)

[Scope of Claims] 1. An electrophotographic photoreceptor having a photoconductive layer on a conductive substrate, characterized in that the photoconductive layer contains a cyanine derivative represented by the following general formula (). (In the formula, k, l, m, n represent integers selected from 0, 1, 2, X represents an anionic functional group, Z, Y
is a 5- to 6-membered heterocycle which may have a substituent, or a residue for forming a 5- to 6-membered heterocycle fused with an aromatic ring such as benzenenaphthalene which may have a substituent represents. _R1 and _R2
represents an aliphatic group or an aryl group that may be substituted. Q is a substituted phenyl group, a naphthyl group,
Indicates anthranyl group, furan group, thiophene group, and pyrrole group. )