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Methenyl dye and photographic silver halide material contg. said dye

A photographic material, silver halide technology, applied in photosensitive materials, emulsified silver emulsion, optics, etc., can solve the problem of not getting enough high sensitization

Inactive Publication Date: 2002-05-01
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Moreover, Bishwakalma et al. disclosed in JP-A-6-27578 that spectral sensitization was achieved using a two-component linked dye comprising a cyanine dye adsorbed on silver halide and a non-absorptive oxonol dye. , and Parton et al. disclosed in EP-A-887700, the use of two-component linked dyes containing adsorbable cyanine dyes and non-adsorbable merocyanine dyes through specific linking groups, but it cannot be said that due to energy transfer sensitization
[0010] Therefore, a sufficiently high sensitization has not been obtained so far by any method of the above patents and documents, and it is necessary to develop other techniques

Method used

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  • Methenyl dye and photographic silver halide material contg. said dye
  • Methenyl dye and photographic silver halide material contg. said dye
  • Methenyl dye and photographic silver halide material contg. said dye

Examples

Experimental program
Comparison scheme
Effect test

Embodiment I-1

[0290] The synthetic embodiment of compound D-455 of the present invention

[0291] 0.68g (1.1mmol) of [1], 0.0134g (0.5mmol) of dicarboxylic acid [2] and 0.16g (1.2mmol) of 1-hydroxybenzoic acid synthesized according to the method disclosed in EP-A-887700 Triazole was dissolved in 40 ml of dimethylsulfoxide and stirred at 60°C for 10 minutes. Thereto were added 0.42 g (1.3 mmol) of uronium salt [3] and 0.51 g (3.9 mmol) of diisopropylethylamine, and the mixture was mixed at 60° C. for 3 hours. After cooling the reaction solution, 400 ml of acetone was added thereto, and the precipitated crystals were filtered and vacuum-dried. Thus, 0.32 g (yield: 46%) of yellow crystalline compound D-45 was obtained.

[0292] Its structure was confirmed by NMR spectrum, MS spectrum and elemental analysis.

[0293] Other compounds of the present invention can also be synthesized in a similar manner.

Embodiment I-2

[0295] Preparation of a kind of emulsion a

[0296] An aqueous solution (1164 ml) containing 0.017 g of KBr and 0.4 g of oxidation-treated gelatin having an average molecular weight of 20,000 was stirred while maintaining its temperature at 35°C. will contain 1.6g AgNO 3 The aqueous solution of KBr, the aqueous solution of KBr and the aqueous solution containing 2.1 g of oxidized gelatin having a molecular weight of 20,000 were added to the above solution within 48 seconds by the three-way jet method. At this point, the silver potential was maintained at 13 mV against a saturated calomel electrode. A KBr aqueous solution was added thereto, the silver potential was adjusted to -66 mV, and its temperature was raised to 60°C. After adding 21 g of succinylated gelatin having an average molecular weight of 100,000 to the above solution, an aqueous solution containing 5.1 g of NaCl was added. And through the two-way jet method, the flow rate was gradually increased within 61 minu...

Embodiment I-3

[0331] A comparison similar to that of Example I-2 was carried out using the color positive photographic material system disclosed in Example 5 of JP-A-8-29904. When the sensitivity of the blue light-sensitive layer of the photographic material using the comparative compound S-1 was taken as 100 (control), the sensitivity of the sample using the compound D-1 of the present invention was 168. The same comparison was performed using the one-step photographic material system disclosed in Example 1 of JP-A-2000-284442. When the sensitivity of the blue light-sensitive layer of the photographic material using the comparative compound S-1 was taken as 100 (control), the sensitivity of the sample using the compound D-1 of the present invention was as high as 166. Also, from the color reversal photographic material system disclosed in Embodiment 1 of JP-A-7-92601 and JP-A-11-160828, the colored paper system in Embodiment 1 of JP-A-6-347944, JP-A-11-160828, - X-ray film system in Examp...

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Abstract

A compound represented by the following formula (1) and a silver halide photographic material containing the compound: wherein Dye 1 represents a first chromophore; Dye 2 represents a second chromophore; L1 represents a linking chain; R1 represents a dissociable group having pKa of 5 or less; m1 represents an integer of from 1 to 5; m2 represents an integer of from 1 to 5; and m3 represents an integer of from 1 to 4.

Description

[0001] technical field [0002] The invention relates to a novel methine dye compound, especially a cyclic methine dye compound in which two chromophores are connected, and a silver halide photographic material containing the methine dye. Background technique [0003] So far, methine compounds have been used as spectral sensitizing dyes in silver halide photographic materials. The technology shown below is known as a technology for improving the light absorption of silver halide grains. In order to improve the light absorption of each particle, it is necessary to increase the adsorption density of the sensitizing dye on the silver halide grains, but usually the spectral sensitizing dye used is adsorbed on the monolayer at a density almost close to the packing density, and cannot be adsorbed on other under. [0004] Some techniques have been proposed in order to solve this problem. For example, P.B.Gilman, Jr. et al. described in Photographic Science and Engineering, Vol.20,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03C1/005G03C1/09G03C1/12
CPCG03C1/12G03C1/09G03C1/0051G03C2001/097
Inventor 滝沢裕雄
Owner FUJIFILM CORP