JPH0427945A - Silver halide color photographic sensitive material - Google Patents

Abstract

PURPOSE:To provide the silver halide color photographic sensitive material which exhibits good color reproduction by correcting unnecessary absorption not only in a blue light region but in a green color region as well and has high image reproduction by using specific couplers. CONSTITUTION:The couplers expressed by general formula [I] are incorporated into the silver halide color photographic sensitive material. In the general formula [I], the residual coupler groups expressed by Cp are generally a residual yellow coupler group, a residual magenta coupler group and a residual cyan coupler group or a residual coupler group which may substantially form image dyes. Het in the general formula [I] is preferably an oxygen atom or alkyl amino group. The aryl group expressed by Ar is preferably a phenyl group or naphthyl group and the heterocyclic group is preferably a pyridyl group, pyrimidyl group, pyrolyl group, pyrazoryl group, furyl group, and oxazoryl group. The silver halide color photographic sensitive material which has the sufficient sensitivity and masking property and is improved in sharpness is obtd. by using such couplers.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a silver halide color negative light-sensitive material containing a novel masking coupler.

[Background of the invention]

A color image of a silver halide color photographic light-sensitive material is produced by the reduction of exposed silver halide grains by an aromatic primary amine color developing agent, and the color developing agent oxide exists in the vicinity of the silver halide grains. It is formed by oxidative coupling with couplers that form yellow, magenta, and cyan dyes. Since the dye image thus formed has undesirable absorption, colored compounds are usually used as masking couplers in color negative light-sensitive materials to correct the undesirable absorption of the magenta dye image and the magenta dye image, respectively. Colored magenta coupler A color tone uncoupler is used.

For example, when correcting undesired absorption in cyan dyes, colored cyan couplers are dyes that absorb green and blue light, but when oxidatively coupled with color developing agent oxides, they form cyan dyes and reduce the extent of color development. Correspondingly, it loses its ability to absorb green and blue light in the spectrum, thereby keeping the unwanted green and blue absorption produced by cyan dye imaging couplers constant. That is, color correction is performed.

However, since these methods add a colored compound to the photosensitive layer, a portion of the incident light that would otherwise act on the silver halide is absorbed, resulting in a decrease in sensitivity.

To address this problem, a type of masking coupler (post-mask) has been proposed that is essentially colorless when mixed into a color photosensitive material and then forms a colored mask during the development process.

U.S. Pat. No. 4,555,477 discloses that a chelating agent is substituted at the coupling position, the coupling reaction releases the chelating agent that can flow into the processing solution, and then treatment is performed with a processing bath containing heavy metals. A masking method is disclosed that forms a chelate dye in an imagewise manner.

Furthermore, in JP-A No. 63-75747, the leuco dye is substituted at the coupling position to release the leuco dye that can flow into the treatment solution used in the coupling reaction, and then the leuco dye is treated with a red blood salt bleaching solution to obtain the leuco dye. A method of forming a masking dye in a positive image manner by oxidizing the dye is disclosed.

These two methods are certainly excellent in that they do not reduce sensitivity, but they require the leaving group to have a ligand or leuco dye, which limits the range of choices for the leaving group, and as a result, coupling It has drawbacks such as low activity and the need for special processing steps.

Furthermore, JP-A-64-52148 discloses a coupler in which a leaving group containing a formyl group is substituted at the coupling position. This coupler is an excellent method in that it does not reduce sensitivity and does not require any special processing because it reacts with a color developing agent to form a masking dye.

[Problem that the invention seeks to solve]

Originally, masking couplers were used in the blue light region (400 to 470
This is a coupler used to correct the asymmetric absorption of coupler dyes existing in the green region (500-580 nm) and in the green region (500-580 nm).
When the masking coupler described in No. 8 is used, asymmetric absorption in the blue light region is corrected, but asymmetric absorption in the green light region is not corrected. This is because the masking dye formed from this masking coupler in the unexposed region has absorption only in the blue light region. Therefore, there was a need for a new masking coupler that corrects asymmetric absorption in the green light region.

[Purpose of the invention]

Therefore, in view of the above conventional problems, the present invention provides a high-quality silver halide color photographic material that corrects unnecessary absorption not only in the blue light region but also in the green light region and exhibits good color reproduction. The purpose is to

The above objects of the present invention have been achieved by a silver halide color photographic material characterized by containing a coupler represented by the following general formula (1).

General formula [1] %formula%) In the formula, Cp represents a coupler residue, Het is ○, SN- or I (R3 represents an alkyl group or an aryl group.

), Ar represents an aryl group or a heterocyclic group,
R1 and R2 represent a hydrogen atom, an alkyl group, an aryl group, or a heterocyclic group; m is 1 when Ar is an aryl group; and 0 or 1 when Ar is a heterocyclic group.

Next, general formula [I] will be explained in detail.

The coupler residue represented by Cp in the general formula (T) is generally a yellow coupler residue, a magenta coupler residue, a cyan coupler residue, or a coupler residue that does not substantially form an image dye, and is preferably a coupler residue. is a coupler residue represented by the following general formula CI a:l to [1h].

General formula (I a) General formula % formula %) General formula (I e) General formula % formula %: 1 General formula [Ib) General formula General formula [I f] General formula In the above general formula (Ia), R1 is represents an alkyl group, an aryl group, an arylamino group, R2 is an aryl group,
Represents an alkyl group.

In the general formula CI, b), R3 represents an alkyl group or an aryl group, and R1 represents an alkyl group, an acylamino group, an arylamino group, a phenylureido group, or an alkylureido group.

In the above general formula CI c), R1 is the general formula (I b
), and R6 represents an acylamino group, a sulfonamide group, an alkyl group, an alkoxy group, or a halogen atom.

In the above general formulas (I d) and (I e), the substituent R7 represents an alkyl group, an aryl group, an arylamino group, an arylamino group, an alkoxy group, a phenylureido group, an alkylureido group, and R6 represents an alkyl group, an aryl group, an alkylureido group, and an alkyl group. represents a group.

In the above general formula (If), R5 represents an acylamino group, a carbamoyl group, or a phenylureido group, and Ra represents a halogen atom, an alkyl group, an alkoxy group, an acylamino group, or a sulfonamide group.

In the above general formula (I g), R9 is the general formula CI f
), and R1° represents an amino group, a substituted amino group, an amide group, a sulfonamide group, or a hydroxyl group.

In the above general formula (I h), R is a nitro group, an acylamino group, a succinimide group, a sulfonamide group,
Represents an alkoxy group, an alkyl group, a halogen atom, or a cyano group.

Furthermore, n in the above general formulas (I D and (I h)) represents an integer of 0 to 2, and m in the above general formula (I g) represents an integer of 0 to 1.

The above-mentioned polygroups include those having substituents. Preferred substituents include a halogen atom, a nitro group, an ano group, a sulfonamido group, a hydroxyl group, a carboxyl group, an alkyl group, an alkoxy group, a carponyloquine group, an acylamino group, and an aryl group.

In the general formula [T), t (et is O, S or a chain or branched alkyl group, an alkenyl group having 1 to 8 carbon atoms, a cycloalkyl group having 3 to 7 carbon atoms, a cycloalkenyl group having 3 to 7 carbon atoms, or Represents a phenyl group, and these groups may have a substituent. Examples of the substituent include halodef 1E, alkyl group, aryl group, alkokene group, hydroxy group, alkylthio group, acylamino group, and sulfone group. Examples thereof include an amide group, a dialkylamino group, a carbamoyl group, a cyan group, a nitro group, and a carboxyl group.

Hei is preferably an oxygen atom or an alkylamino group.

In the general formula CI), the aryl group represented by Ar is preferably a phenyl group or a 7-tyl group, and the heterocyclic group is preferably a pyridyl group, a pyrimidyl group, a pyrrolyl group, a pyrazolyl group, an imidazolyl group, or a triazolyl group. , indolyl group, imidazolyl group, quinolyl group, thienyl group, furyl group, and oxasilyl group. These groups may have a substituent, and examples of the substituent include a halogen atom, an alkyl group, an aryl group, an alkoxy group, an aryloxy group, an alkylthio group, an arylthio group, an amino group, an annulamino group, and a sulfone group. Examples thereof include an amide group, a sulfamoyl group, a carbamoyl group, a cyan group, a nitro group, a hydroxy group, a carpoquine group, a sulfo group, a formyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, and an acyloxy group.

Among Ar, particularly preferred are phenyl group, naphthyl group and pyridyl group.

In the general formula (1), the alkyl group represented by R1 and R2 preferably represents a straight chain or branched alkyl group having 1 to 18 carbon atoms.

The aryl groups represented by R1 and R2 in general formula (I) are preferably phenyl groups.

In general formula CI), the heterocyclic group represented by R1 and R2 preferably represents a 5- or 6-membered nitrogen-containing heterocycle. R1 and R2 further have substituents in the coupler structure NtJ.

(]2) u2 CHCHO The coupler represented by the general formula CI) of the present invention can be easily synthesized by a conventionally known method.

Typical synthesis examples of the present invention are shown below.

Synthesis Example 1: Synthesis of Exemplary Coupler (1) 5.5 g of compound (A) and 2.3 g of compound (B) were dissolved in 60 mQ of acetone, and 1.6 g of anhydrous potassium carbonate was added.
was added and heated under reflux for 3 hours. After filtering off insoluble matter and removing the solvent under reduced pressure, ethyl acetate room 12 was added to the residue, and the mixture was washed with 5% aqueous potassium carbonate solution and diluted hydrochloric acid. After washing, the organic layer was dehydrated with anhydrous magnesium sulfate, and the solvent was removed under reduced pressure. The resulting residue was recrystallized from 20m(+) isopropanol to obtain the desired exemplary coupler (1). Yield: 3.4 g (48%).

(A) (B) -1---
→ Exemplary coupler (1) Synthesis example 2: 4.9 g of synthetic compound (C) of exemplary coupler (10) was dissolved in 50 ml of DMF,
The mixture was cooled in a water bath under a nitrogen stream until the internal temperature became 5°C or less. To this solution, 5 ml of 10% potassium hydroxide solution was added dropwise, and further 2.0 g of compound (D) was added to DIlfFlO.
The solution dissolved in mff was added dropwise. The reaction mixture was allowed to react for 30 minutes in a water bath under a nitrogen stream, and then for 2 hours after removing the water solution. After the reaction was completed, 300 m+2 of ice water was added to the reaction solution, the pi was adjusted from 3 to 4 with 3N hydrochloric acid, and 200 m++ of ethyl acetate was added for extraction.

After washing the organic layer three times with 200 m of brine (2),
After dehydrating the organic layer over anhydrous magnesium, the solvent was removed under reduced pressure. The obtained residue was coated with silica gel (Wakogel).
Separation and purification by column chromatography using C-200) and recrystallization from 20m0 of acetonitrile yielded 3.5g of the target exemplary compound (10).○■ (C) (D)-111- →
Exemplary coupler (10) The structure of exemplary couplers (2) and (10) is N
i, Ili', and mask vector l. The other illustrative couplers were also synthesized in accordance with the above synthesis examples, starting from their respective starting materials.

The silver halide emulsion used in the light-sensitive material of the present invention includes:
Any of the conventional silver halide emulsions can be used.

The emulsion can be chemically sensitized by conventional methods, and can be optically sensitized to a desired wavelength range using a sensitizing dye.

Antifoggants, stabilizers, etc. can be added to the silver halide emulsion. Gelatin is advantageously used as binder for the emulsion.

The emulsion layer and other hydrophilic colloid layers can be hardened and can contain a plasticizer and a dispersion (latex) of a water-insoluble or sparingly soluble synthetic polymer.

A coupler is used in the emulsion layer of a light-sensitive material for color photography.

Furthermore, by coupling with a colored coupler having a color correction effect, a competitive coupler, and an oxidized form of a developing agent, a development accelerator, a bleach accelerator, a developer, a silver halide solvent,
Compounds that release photographically useful fragments can be used, such as toning agents, hardeners, fogging agents, antifoggants, chemical sensitizers, spectral sensitizers, and desensitizers.

The photosensitive material can be provided with auxiliary layers such as a filter layer, an antihalation layer, and an antiirradiation layer. These layers and/or the emulsion layer may contain dyes that are washed out or bleached from the light-sensitive material during the development process.

A formalin scavenger-1 fluorescent whitening agent, a matting agent, a lubricant, an image stabilizer, a surfactant, a color fog preventive agent, a development accelerator, a development retarder, and a bleach accelerator can be added to the photosensitive material.

As the support, paper laminated with polyethylene or the like, polyethylene terephthalate film, baryta paper, cellulose triacetate, etc. can be used.

To obtain a dye image using the photosensitive material of the present invention, after exposure,
Commonly known color photographic processing can be performed.

Example-1 The masking coupler of the present invention and the comparative masking coupler as shown in Table 1 were each used at a concentration of 0.1 to 1 mole of silver.
One mole of tricresyl phosphate and three times the amount of ethyl acetate were added to the coupler, and the mixture was heated to 60° C. to completely dissolve. This solution was mixed with 120ml of a 5% aqueous gelatin solution containing 120ml of a 5% aqueous solution of Alkanol B (alkylnaphthalene sulfonate, manufactured by DuPont).
12 and emulsified and dispersed using an ultrasonic dispersion machine to obtain an emulsion.

Thereafter, this dispersion was added to 4 kg of red-sensitive silver iodobromide emulsion (containing 6 mol% silver iodide), and 1.2-
A sample was prepared by adding 120 mQ of a 2% solution of his(hinylsulfonyl)ethane (water:methanol-1:1), and coating and drying it on a subbed transparent polyester base.

(Amount of coated silver: 20 mg/100 cm") Comparative Masking Coupler A Comparative Masking Coupler B According to a conventional method, these samples were subjected to red light step exposure using a photosensitive needle, and the following development treatments were performed.

Processing process (38°C) Processing time Color development
Bleach for 3 minutes 15 seconds Wash with water for 6 minutes 30 seconds 3 minutes 15 seconds
Fixation in seconds: 6 minutes and 30 seconds Washing with water: 3 minutes and 15 seconds Stability: 1 minute and 30 seconds The composition of the treatment liquid used in each treatment step was as follows.

(Color developer composition) 4-Amino-3-methyl-N-ethyl-N-(β-hydroxyethyl)-aniline sulfate Anhydrous sodium sulfite Hydroxylamine l/2 Sulfate Anhydrous potassium carbonate Sodium bromide Nitrilotriacetic acid 3 Sodium salt (monohydrate) Potassium hydroxide solution was added to bring the concentration to 112, and potassium hydroxide was adjusted to 10.0.

(Bleach solution composition) Iron ethylenediaminetetraacetate ammonium salt Ethylenediaminetetraacetic acid 2 ammonium salt ammonium bromide glacial acetic acid Add water to make lQ, pH using ram 10.0g 150.0g 10.0mff pH using ammonia water 4.75g 4.25g 2.0 g 37.5g 1.38 2.5g 1.0g 100.0g Adjusted to 6.0.

(Fixer composition) Ammonium thiosulfate (50% aqueous solution) 162m
12 Anhydrous sodium sulfite 12.4g
Water was added to make li2, and the pH was adjusted to 6.5 using acetic acid.

(Stabilizing liquid composition) Formalin (37% aqueous solution) 5.0mQ
Konidax (manufactured by Konica Corporation) 7.5mf
f Water was added to make 112.

For the obtained sample, the fog density (Fog) of the unexposed area and the relative sensitivity (S, relative value when the sensitivity of sample 1 is set to 100) were determined using red light.

The results are shown in Table 1 below.

Table 1 Sample No., Masking Coupler 1 (Comparison)
A 2 (comparison) B 3 (present invention) 8 4 (present invention) 10 5 (present invention) 12 6 (present invention) 17 Fog SO, ], 0 00 0, +1 110 0.09 116 0.08 120 0.10 15 0.09 118 From Table 1, it is clear that the masking coupler of the present invention exhibits higher color development than the comparative masking coupler.

Example-2 Take 0.02 mole each of a masking coupler and a cyan coupler C-1 (described later) as shown in Table 2 below,
A mixed solution of the same amount of dibutyl phthalate and three times the amount of ethyl acetate as the total amount was added and heated to 60° C. to dissolve. This solution was added to an aqueous solution of Alkanol B (alkylna 7-talene sulfonate, manufactured by DuPont) and gelatin, and emulsified using a colloid mill to prepare a coupler dispersion.

This coupler dispersion was then added to a red-sensitive silver iodobromide emulsion (7 mole % silver iodide) containing 0.1 mole of silver.1.
0.1 g of taurine reactant of 2-bis-vinylsulfonylethane was added, and the sample was coated on a transparent cellulose triacetate film base and dried to produce four types of silver chloride with stable coating films. To No. 9, cyan coupler C-1 was further added in an equimolar amount to that of the masking coupler, so that the gradations were almost matched.

Table 2 Sample No. Masking coupler 7 (comparison) A 8 (comparison) B 9 (present invention) 1 10 (present invention) 10 Each sample thus obtained was exposed in the same manner as in Example-1. Developed. After drying, the masking effect was evaluated using green light, and in comparison sample 8, almost no masking effect was observed in this area. On the other hand, samples 9 and l using the masking coupler of the present invention
It was found that in O, a sufficient masking effect was obtained, similar to Comparative Sample 7 using the conventionally used Colordon Uncoupler-A.

Example 3 In the following examples, the amounts added in silver halide photographic materials are expressed in grams per 1 m'' unless otherwise specified. Also, silver halide and colloidal silver are expressed in terms of silver. Ta.

Multilayer color photographic element sample No. 21 was prepared by sequentially forming each layer having the composition shown below on a triacetyl cellulose film support from the support side.

Sample-No. 21 (Comparison) 1st layer: Antihalation layer (HC-1) Black colloid 0.20 UV absorber (U
V-1) 0.20 colored coupler (
CC-1) 0.05 colored coupler (C
M-1) 0.05 high boiling point organic solvent (Oil
-1) 0.20 gelatin
1.5 Second layer: Intermediate layer (1, L, -1) U■ Absorbent (UV-1) 0.01 High boiling point organic solvent (○il-] ) 0.01 Gelatin 1.5 Third layer: Low-sensitivity green-sensitive emulsion layer (RL) Silver iodobromide emulsion (Em-1)
1.0 silver iodobromide emulsion (E m -2)
0.5 sensitizing dye (S-1)
2.5XlO-' (mol/silver 1 mol) Sensitizing dye (S-2) 2.5X 10
-' (mol/silver 1 mol) Sensitizing a element (S-3) 0.5X 1
0-' (mol/silver 1 mol) Cyan coupler (C-1) 0.8 Cyan coupler (C-2) 0.2 Masking coupler (MC-1) 0.05DIR compound CD-1) 0.002 High boiling point Solvent (Oil-1) 0.5 gelatin
1.5 Fourth layer: High sensitivity red-sensitive emulsion layer (RH) Silver iodobromide emulsion (E m -3) 2.0 Sensitizing dye (S -1) 2.0xlO-'
(Mole/1 mole of silver) Sensitizing dye (S-2) 2. Ox10
-' (mol/silver 1 mol) Sensitizing dye (S -3) O, lX 10
-' (mol/silver 1 mol) Cyan coupler (C-3) 0.25 Masking coupler (MC-1) 0.015D
IR compound (D -2) 0.05 High boiling point solvent (Oii -1) 0.5 Gelatin 1.5 5th layer: Intermediate layer (1, L, -2) Gelatin 0.5 6th layer:
Low-sensitivity green-sensitive emulsion layer (GL) Silver iodobromide emulsion (Em-1
) 1.0 sensitizing dye (S-4)
5X10- (mol/1 mole of silver) Sensitizing dye (S-5) lX10-' (mol/1 mole of silver) Magenta coupler CM-1) 0.4 colored magenta coupler (CM-1) DIR compound CD-3
) DIR compound (D-4) High boiling point solvent (O4l-2) Gelatin 0.05 0.015 0.020 0.5 1.0 7th layer: Intermediate layer (1, L, -3) Gelatin 0.8 High boiling point solvent (Oil -1) 0.2 8th layer: High sensitivity green sensitive emulsion layer (OH) Silver iodobromide emulsion (Em-3) 1.3 Sensitizing dye (S -6) 1.5X 10-
'(mol/silver I mole) Sensitizing dye (S-7) 2.5X 1
0-' (mol/silver 1 mol) Sensitizing dye (S-8) o, sx 1
0-' (mol/mol of silver) Magenta coupler (M-2) 0.05 Magenta coupler (M-3) 0.15 Colored magenta coupler (CM-2) 0.05 DIR compound (D-3) 0. 01 High-elevation point solvent (Oil-3) 0.5 Gelatin l・0 9th layer: Yellow filter layer (yc) Yellow colloidal silver
04 color stain prevention agent (S C-1')
0.1 high boiling point organic solvent (Oil-3)
0.1 gelatin 0.8
1st O layer: Low-speed blue-sensitive emulsion layer (BL) Silver iodobromide emulsion (Em-1) 0.25 Silver iodobromide emulsion (E
m-2) 0.25 sensitizing dye (S-10
) 7X 10 (mole/1 mole of silver) Yellow coupler (Y-1) 0.5 Yellow coupler (Y-2) 0.1DIR
Compound (D-2) 0.01 High boiling point solvent (Oil-3) 0.5 Gelatin
1.0 11th layer: High sensitivity blue-sensitive emulsion layer (B H) Silver iodobromide emulsion (Em-4) Silver iodobromide emulsion (Em-J) Sensitizing dye (S-9) Sensitizing dye (510 ) 0.50 0.20 JXJO-' (mol/silver J mol) 3×]0 (mol/silver 1 mol) 0.30 0.05 0.07 1.1 Yellow coupler (Y-1) Yellow coupler (Y-2) High boiling point solvent (○1f-3) Gelatin 12th layer: 1st protective layer (PRO-1) Fine grain silver iodobromide emulsion (average grain size 0.08μ, Ag1) 2 mol%) LIV absorption Agent (UV-1) UV absorber (UV-2) High boiling point solvent (○1l-1) High boiling point solvent (○1l-4) Formalin scavenger (H5-1) Formalin scavenger (H3-2 ) Gelatin 0.4 0.10 0.05 0.1 0.1 0.5 0.2 1.0 13th layer: 2nd protective layer (PRO-2) Surfactant (S
u-1) 0.005 alkali-soluble matting agent) 0.10 (average particle size 2 μm
) Cyan dye (AI C-1) 0.00
5 Magenta dye (AIM-1) 0. Old Schheli agent (WAX-1) 0.04 Gelatin 0.6 In addition to the above composition, each layer contains coating aid 5u-2, dispersion aid 5u-3,
Hardeners H-1 and H-2, preservative DI-1. Stabilizer 5t
ab-1 and antifoggants AF-1 and AF-2 were added.

Em-1 Average grain size 0.46 μm 1 average silver iodide content 7.5%, monodisperse silver iodobromide emulsion Em-2 Average grain size 0.32 μm 1 average silver iodide content 2.0%, monodisperse silver iodobromide emulsion Dispersible silver iodobromide emulsion Em-3 Average grain size 0.78 μm 1 Average silver iodide content 6.0% Monodisperse silver iodobromide emulsion Em-4 Average grain size 0.95 μm 1 Average iodide Silver content 8.0%, monodisperse silver iodobromide emulsion S (shih2)3Sυ, t' (CHz)ssOJN(CJs)s (CHz), S03Na H CIC l2C1 V-1 S S ■ [( CH2= coso, co, ), cCH, so
, (co2)! 12N (CHI), so, Ni○ i○ Carp○ AX-1 Su 1 c-t 0 ■ IC-1 IM ■ MaI;, Masking coupler MC-] of the third and fourth layers of sample 21 was Change as shown in layer 3, sample 22-2
6 was created. However, the third and fourth layers of samples 23 and 25
Cyan coupler c-2 was further added to the layer in an amount equimolar to that of the masking coupler to almost match the gradation.

Table 3 Comparative Masking Coupler C-1 (Coupler described in JP-A No. 64-52148) Comparative Masking Coupler MC Each of the samples No. 21 to 26 thus prepared was wedge exposed using white light. , development processing was performed. The treatment steps and treatment liquid composition are exactly the same as in Example 1.

When each of the samples thus obtained was evaluated, comparative samples 21 and 22 had insufficient masking effects in the green light region.

On the other hand, samples 23-2 using the masking coupler of the present invention
In Example 6, a flat mask with sufficient mask density in both the blue light and green light regions was obtained.

〔Effect of the invention〕

According to the present invention, it was possible to obtain a silver halide color photographic material having sufficient sensitivity and masking properties and improved sharpness.

Claims (1)

[Scope of Claims] A silver halide color photographic light-sensitive material characterized by containing a coupler represented by the following general formula [I]. General formula [I] ▲There are mathematical formulas, chemical formulas, tables, etc.▼ [In the formula, Cp represents a coupler residue, Het is O, S, or ▲There are mathematical formulas, chemical formulas, tables, etc.▼ (R^3 is an alkyl group , represents an aryl group), Ar represents an aryl group or a heterocyclic group, R^1 and R^2 represent a hydrogen atom, an alkyl group, an aryl group, or a heterocyclic group, and R^1 and R^2 may be combined to form a ring. m is l when Ar is an aryl group, and is 0 or l when Ar is a heterocyclic group. ]