Enhancement of singlet oxygen sensitization of tetraphenylporphyrin by silylation
Enhancement of singlet oxygen sensitization of tetraphenylporphyrin by silylation
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DOI：
10.1246/cl.2006.662
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发表时间：
2006-06-05
影响因子：
1.6
通讯作者：
Hiratsuka, Hiroshi
中科院分区：
文献类型：
--
作者：
Horiuchi, Hiroaki;Tanaka, Toru;Hiratsuka, Hiroshi
研究了5，10，15，20-tetrakis(4-trimethylsilylphenyl)porphyrin的光物理增感和单线态氧增感过程。研究发现，5，10，15，20-四苯基卟啉(TPP)的硅烷化反应提高了单线态氧的量子产率(Phi(Delta))。硅基化不影响TPP的光物理过程，但提高了三重态敏化剂f(Delta)(T)对单线态氧的敏化效率。这种增强可以通过抑制由三重态敏化剂和基态氧组成的三重态相遇络合物到基态敏化剂和氧的过程来解释。
Photophysical and singlet oxygen sensitization processes of 5,10,15,20-tetrakis(4-trimethylsilylphenyl)porphyrin have been studied. It was found out that the quantum yield (Phi(Delta)) of singlet oxygen production increased by the silylation of 5,10,15,20-tetraphenylporphyrin (TPP). The silylation does not affect the photophysical processes of TPP but enhances the sensitization efficiency of singlet oxygen by the triplet sensitizer (f(Delta)(T)). This enhancement can be explained by the suppression of the process from the triplet encounter complex composed of the triplet sensitizer and ground-state oxygen to the ground-state sensitizer and oxygen.