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+
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.
出处
《感光科学与光化学》
CSCD
北大核心
2001年第3期169-176,共8页
Photographic Science and Photochemistry
基金
国家自然科学基金资助项目 ( 2 98361 50 )
