菁染料和份菁染料溶液的光降解机理的研究

doi:10.7517/j.issn.1674-0475.2001.03.169

影像科学与光化学 ›› 2001, Vol. 19 ›› Issue (3): 169-176.DOI: 10.7517/j.issn.1674-0475.2001.03.169

菁染料和份菁染料溶液的光降解机理的研究

杨松杰¹, 孟凡顺¹, 田禾¹, 姚思德²

1. 华东理工大学精细化工研究所, 上海200237;
2. 中国科学院上海原子核研究所辐射化学开放研究实验室, 上海201800

收稿日期:2000-10-11 修回日期:2000-11-07 出版日期:2001-08-20 发布日期:2001-08-20
通讯作者: 田禾,Tel:(021)64252288
基金资助:
国家自然科学基金资助项目(29836150)

STUDY ON THE PHOTODEGRADATION MECHANISM OF CYANINE DYES AND MEROCYANINE DYES SOLUTION

YANG Song-jie¹, MENG Fan-shun¹, TIAN He¹, YAO Si-de²

1. Institute of Fine Chemicals, East China University of Science &, Technology, Shanghai 200237, P. R. China;
2. The Laboratory of Radiation Chemistry, Shanghai Institute of Nuclear Research, Chinese Academy of Sciences, Shanghai 201800, P. R. China

Received:2000-10-11 Revised:2000-11-07 Online:2001-08-20 Published:2001-08-20

摘要/Abstract

摘要： 利用UV-Vis吸收光谱仪和光化学反应器,研究了菁染料和份菁染料溶液的光降解动力学,认为染料在乙腈溶液中的光褪色反应服从假一级或零级动力学.利用GC/MS光谱仪检测了染料的光降解产物.与相应的份菁染料相比,携带正电荷的菁染料具有相对较好的光稳定性.研究结果表明,菁染料光降解反应的中间体可能是染料的半氧化态Dye⁺,并利用纳秒级闪光光解技术研究了Dye⁺的瞬态吸收光谱.

关键词: 菁染料, 光稳定性, 份菁染料, 闪光光解

Abstract: The photodegradation kinetics of cyanine dyes and merocyanine dyes were studied by UV-Vis absorption spectroscopy. The results show that the rate of the photofading reactions of the dyes follow quasi-first-order or zero order kinetics in acetonitrile. The main photodegradation products of the dyes were identified by GC/MS spectrometry. Those cyanine dyes holding a positive charge have relative good photostability comparing with merocyanines. The experimental results imply that the photodegradation intermediates for the cyanine dyes may be the semi-oxide-state of dye, Dye⁺. The transient absorption spectra of Dye⁺ were measured by nanosecond laser flash photolysis.

Key words: photodegradation, cyanine dyes, merocyanine dyes, flash photolysis

中图分类号:

O644

杨松杰, 孟凡顺, 田禾, 姚思德. 菁染料和份菁染料溶液的光降解机理的研究[J]. 影像科学与光化学, 2001, 19(3): 169-176.

YANG Song-jie, MENG Fan-shun, TIAN He, YAO Si-de. STUDY ON THE PHOTODEGRADATION MECHANISM OF CYANINE DYES AND MEROCYANINE DYES SOLUTION[J]. Imaging Science and Photochemistry, 2001, 19(3): 169-176.

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菁染料和份菁染料溶液的光降解机理的研究

STUDY ON THE PHOTODEGRADATION MECHANISM OF CYANINE DYES AND MEROCYANINE DYES SOLUTION

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