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Polarographic Analysis of Reductive Fading Reactions of 4-Aza-2'-ethyl-4'-Diethylaminophenyl-Quinones
https://kougei.repo.nii.ac.jp/records/140
https://kougei.repo.nii.ac.jp/records/1404f998049-7ccb-4133-8ea1-eb452ad7e043
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
KJ00001511924.pdf (309.5 kB)
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| Item type | [ELS]紀要論文 / Departmental Bulletin Paper(1) | |||||
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| 公開日 | 2017-04-21 | |||||
| タイトル | ||||||
| タイトル | Polarographic Analysis of Reductive Fading Reactions of 4-Aza-2'-ethyl-4'-Diethylaminophenyl-Quinones | |||||
| 言語 | en | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | departmental bulletin paper | |||||
| 雑誌書誌ID | ||||||
| 収録物識別子タイプ | NCID | |||||
| 収録物識別子 | AN00159741 | |||||
| 論文名よみ | ||||||
| タイトル | Polarographic Analysis of Reductive Fading Reactions of 4-Aza-2'-ethyl-4'-Diethylaminophenyl-Quinones | |||||
| 著者 |
JINDI, Wang
× JINDI, Wang× 宮川, 俊夫× 白井, 靖男× JINDI, Wang× MIYAGAWA, Tohio× SHIRAI, Yasuo |
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| 著者所属(日) | ||||||
| 華東化工学院 | ||||||
| 著者所属(日) | ||||||
| 東京工芸大学工学部 | ||||||
| 著者所属(日) | ||||||
| 東京工芸大学工学部 | ||||||
| 著者所属(英) | ||||||
| en | ||||||
| East China Institute of Chemical Technology | ||||||
| 著者所属(英) | ||||||
| en | ||||||
| Faculty of Engineering Tokyo Institute of Polytechnics | ||||||
| 著者所属(英) | ||||||
| en | ||||||
| Faculty of Engineering Tokyo Institute of Polytechnics | ||||||
| 記事種別(日) | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | 論文 | |||||
| 記事種別(英) | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | Article | |||||
| 抄録(英) | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | This paper concerns the effect of substituent groups of phenolic couplers on dark stability of cyan quinonimine dyes deduced from the polarographic analysis of the solutions of two structure types of this class of dyes. These dyes were prepared by oxidative coupling of CD-2 developing agent (2-amino-5-diethylaminotoluene) with m-cresol or a 2-, 5-diacylamino-Pheno1. Polarographic measurements of these dyes were carried out in a mixture of ethanol and Britton-Robinson (borate-acetate-phosphate) buffer solution (volume ratio, 1.5 : 1) as a supporting electrolyte at 20±O.2℃,bubbled with nitrogen gas. Plots of E versus log {i/(i_d-i)} reveal that the leuco dye formations of these dyes are two-electron processes. In the case of the m-cresol dye, the proton number calculated from a plot of pH versus E_<1/2> was 2.8 in the range of pH 6.1～6.9,and 2.0, pH 7.1～7.8. Consequently, the fading reaction of the dye can be written as follows : Dye+2e+3H^+ → Leuco Dye・H^+ (Protonated Leuco Dye), in the lower pH region, and Dye+2e+2H^+ → Leuco Dye, in the higher pH region. The half-wave potential of the acylaminophenol dye was much more negative than that of the m-cresol dye. Thus, the fading reaction of the dye does not proceed easily in the presence of a reducing agent. The proton number that the dye required was approximately 2.0 in the pH range 5.9～7.6. The chemical equation for the redox reaction of the dye can be expressed as follows : Dye+2e+2H^+ → Leuco Dye. The m-cresol dye could be easily reduced and thus fade in the presence of thiosulfate or EDTA-Fe (II), because there was a big difference between the half-wave potential of the dye and these reducing agents. For example, in the faded solution with thiosulfate polarographic waves of the leuco dye and tetrathionate ions were observed separately. Therefore, the leuco dye formation of m-cresol dye in the fading reaction with reducing agent can be written as follows : Dye+2Red.+3H^+ → Leuco Dye・H^++2O_x. in the lower pH region, Dye+2Red.+2H^+ → Leuco Dye+2Ox. in the higher pH region. On the other hand, the half-wave potential of the acylamino-Phenol dye is close to those of the reducing agents. As 21 result, the polarographic waves of the leuco dye and the oxides of the reeucing agents were not observed separately. It is suggested that the cyan dye image formed with an acylaminophenol dye would be much more stable than a m-cresol dye under the reductive conditions. Consequently, some basic information to predict dad stability of cyan quinonimine dye images under reductive conditions can be obtained by measurement of the half-wave potential of dye solutions. | |||||
| 書誌情報 |
東京工芸大学工学部紀要 en : The Academic Reports, the Faculty of Engineering, Tokyo Polytechnic University 巻 10, 号 1, p. 42-47, 発行日 1987 |
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| 表示順 | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | 9 | |||||
| アクセション番号 | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | KJ00001511924 | |||||
| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 03876055 | |||||
