Products of photodegradation for coumarin laser dyes
Products of photodegradation for coumarin laser dyes
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香豆素激光染料光降解产物
DOI：
10.1016/0030-4018(84)90176-7
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发表时间：
1983
影响因子：
2.4
通讯作者：
W. Bergmark
中科院分区：
文献类型：
--
作者：
G. Jones;W. R. Jackson;S. Kanoktanaporn;W. Bergmark
研究了香豆素激光染料C1、C35、C153和C152的常规光解产物。先前报道的C1脱烷基反应记录了氟化染料C35和C152在脱氧溶剂中的脱烷基反应。此外，还鉴定出C1的还原产物，符合自由基分解机制。证明了单线态染料的浓度猝灭（自猝灭）在降解机理中起重要作用。对于刚性染料C153，涉及胺功能的光氧化产物在曝气介质中分解产生。对于一些染料，已经测量到非常低的三重态产率。
The products of conventional photolysis of the coumarin laser dyes, C1, C35, C153, and C152 have been investigated. The previously reported dealkylation of C1 is documented for the fluorinated dyes, C35, and C152 in deaerated solvents. In addition, a reduction product is identified for C1, consistent with a radical mechanism for decomposition. Evidence is provided that the concentration quenching (self quenching) of singlet dye is important to the degradation mechanism. For the rigid dye, C153, a photooxidation product involving the amine functionality results from decomposition in aerated media. For several dyes, very low triplet yields have been measured.