Photoinduced charge injection from excited triplet hypocrellin B into TiO_2 colloid in ethanol |
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| Authors: | WU Tao SHEN Jian-Quan TIAN Chun-Hong SONG Ai-MinLI Wen CHEN Shen ZHANG Man-Hua SHEN TaoCenter for Molecular Sciences |
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| Institution: | WU,Tao SHEN,Jian-Quan TIAN,Chun-Hong SONG,Ai-MinLI,Wen CHEN,Shen ZHANG,Man-Hua SHEN,TaoCenter for Molecular Sciences,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100080,China |
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| Abstract: | Photosensitization of TiO2 colloid by hypocrellin B (HB), a natural photodynamic pigment with extremely high photostability, has been studied by surface enhanced Raman spectroscopy (SERS), laser flash photolysis and electron paramagnetic resonance (EPR) techniques. The photosensitization of TiO2 occurred practically from the exited triplet dye and the electron injection rate constant is 1.3×106 s?1. The influences of donor and acceptor on the electron injection were investigated. |
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| Keywords: | Hypocrellin B TiO_2 photosensitization electron injection |
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