A new model system for studying excited states of dye aggregates of photographic color paper

Yousuke Miyashita; Junichi Mori; Hiroshi Yokoyama; Mitsuo Yoshikane; Hiroyuki Watanabe; Kiyoshi Takeuchi; Hitoshi Kasai; Hachiro Nakanishi; Tokuji Miyashita

doi:10.1016/j.jphotochem.2007.07.025

A new model system for studying excited states of dye aggregates of photographic color paper

Yousuke Miyashita, Junichi Mori, Hiroshi Yokoyama, Mitsuo Yoshikane, Hiroyuki Watanabe, Kiyoshi Takeuchi, Hitoshi Kasai, Hachiro Nakanishi, Tokuji Miyashita

IMRAM - Materials-Measurement Hybrid Research Center

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

As a new model system of dye-containing oil droplet of color paper, the dispersion of dye-containing oil droplet in water was successfully prepared by reprecipitation method, and was used for the analysis of photo-excited states of dyes used for color image formation in silver halide color photography. This model was applied to analysis of photo-excited states of yellow dye aggregates of 1,1-dioxo-1,2,4-benzothiadiazine series. It was found that the lightfastness of the yellow dye of this series is controlled by the degree of aggregation and the lifetime of S₁ state of the aggregate. Based on the finding, we have succeeded in improvement of lightfastness of the dye by sterically hindering the aggregation and reducing the lifetime of the excited state.

Original language	English
Pages (from-to)	129-135
Number of pages	7
Journal	Journal of Photochemistry and Photobiology A: Chemistry
Volume	194
Issue number	2-3
DOIs	https://doi.org/10.1016/j.jphotochem.2007.07.025
Publication status	Published - 2008 Feb 20

Keywords

Dye aggregates
Lightfastness
Organic nanoparticle
Reprecipitation method

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10.1016/j.jphotochem.2007.07.025

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title = "A new model system for studying excited states of dye aggregates of photographic color paper",

abstract = "As a new model system of dye-containing oil droplet of color paper, the dispersion of dye-containing oil droplet in water was successfully prepared by reprecipitation method, and was used for the analysis of photo-excited states of dyes used for color image formation in silver halide color photography. This model was applied to analysis of photo-excited states of yellow dye aggregates of 1,1-dioxo-1,2,4-benzothiadiazine series. It was found that the lightfastness of the yellow dye of this series is controlled by the degree of aggregation and the lifetime of S1 state of the aggregate. Based on the finding, we have succeeded in improvement of lightfastness of the dye by sterically hindering the aggregation and reducing the lifetime of the excited state.",

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author = "Yousuke Miyashita and Junichi Mori and Hiroshi Yokoyama and Mitsuo Yoshikane and Hiroyuki Watanabe and Kiyoshi Takeuchi and Hitoshi Kasai and Hachiro Nakanishi and Tokuji Miyashita",

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AU - Miyashita, Yousuke

AU - Mori, Junichi

AU - Yokoyama, Hiroshi

AU - Yoshikane, Mitsuo

AU - Watanabe, Hiroyuki

AU - Takeuchi, Kiyoshi

AU - Kasai, Hitoshi

AU - Nakanishi, Hachiro

AU - Miyashita, Tokuji

PY - 2008/2/20

Y1 - 2008/2/20

N2 - As a new model system of dye-containing oil droplet of color paper, the dispersion of dye-containing oil droplet in water was successfully prepared by reprecipitation method, and was used for the analysis of photo-excited states of dyes used for color image formation in silver halide color photography. This model was applied to analysis of photo-excited states of yellow dye aggregates of 1,1-dioxo-1,2,4-benzothiadiazine series. It was found that the lightfastness of the yellow dye of this series is controlled by the degree of aggregation and the lifetime of S1 state of the aggregate. Based on the finding, we have succeeded in improvement of lightfastness of the dye by sterically hindering the aggregation and reducing the lifetime of the excited state.

AB - As a new model system of dye-containing oil droplet of color paper, the dispersion of dye-containing oil droplet in water was successfully prepared by reprecipitation method, and was used for the analysis of photo-excited states of dyes used for color image formation in silver halide color photography. This model was applied to analysis of photo-excited states of yellow dye aggregates of 1,1-dioxo-1,2,4-benzothiadiazine series. It was found that the lightfastness of the yellow dye of this series is controlled by the degree of aggregation and the lifetime of S1 state of the aggregate. Based on the finding, we have succeeded in improvement of lightfastness of the dye by sterically hindering the aggregation and reducing the lifetime of the excited state.

KW - Dye aggregates

KW - Lightfastness

KW - Organic nanoparticle

KW - Reprecipitation method

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JF - Journal of Photochemistry and Photobiology A: Chemistry

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A new model system for studying excited states of dye aggregates of photographic color paper

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Keywords

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