Heavy-atom effects on metalloporphyrins and polyhalogenated porphyrins
Heavy-atom effects on metalloporphyrins and polyhalogenated porphyrins
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DOI：
10.1016/s0301-0104(02)00485-8
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发表时间：
2002-06-15
期刊：
影响因子：
2.3
通讯作者：
Gonsalves, AMDR
中科院分区：
文献类型：
--
作者：
Azenha, EG;Serra, AC;Gonsalves, AMDR
使用单光子计数、光声量热法和发光技术研究卤化和金属化四苯基卟啉的光物理学。这些分子和相关分子中的无辐射跃迁速率可以用量子力学隧道模型来解释，该模型经过修改以包括自旋轨道耦合对系间穿越速率的影响。结果表明，邻位具有卤素的四苯基卟啉具有长寿命的三重态，并且可以高产率形成。 (C) 2002 Elsevier Science B.V. 保留所有权利。
The photophysics of halogenated and metallated tetrakisphenylporphyrins is investigated using single-photon counting, photoacoustic calorimetry and luminescence techniques. The radiationless transition rates in these and related molecules are interpreted with a quantum-mechanical tunnelling model modified to include the effect of spin-orbit coupling in the intersystem crossing rates. It is shown that tetrakisphenylporphyrins with halogens in the ortho positions have long-lived triplet states that are formed in high yields. (C) 2002 Elsevier Science B.V. All rights reserved.