STUDY ON THE PHOTO-INDUCED FREE RADICAL IN THE SYSTEM OF PHENOTHIAZINE/TiO2

Chinese Journal of Magnetic Resonance ›› 1999, Vol. 16 ›› Issue (2): 97-102.

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STUDY ON THE PHOTO-INDUCED FREE RADICAL IN THE SYSTEM OF PHENOTHIAZINE/TiO₂

Jian Huahua¹, Liu Yang¹, Xu Guangzhi¹, Chen Ciping², Zhou Benmao²

1 Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080;
2 Institute of Photochemical Sciences, Chinese Academy of Sciences, Beijing 100101

Received:1998-11-26 Revised:1999-01-11 Published:1999-04-05 Online:2018-01-11

Abstract

Abstract: The free radical PTH·⁺ photo-induced in the system of phenothiazine(PTH)/TiO₂ has been studied by ESR. In the system of PTH/RH, the PTH·⁺ is produced by photoionization of PTH. On the other hand, in the system of PTH/RH/TiO₂, the PTH·⁺ is generated by photo-ionization of PTH, as well as by the electron transfer from the ¹PTH^* to the conduction band of TiO₂. Furthermore, the diamagnetic ion PTH²⁺ is also obtained by the electron transfer from the PTH·⁺ to the conduction band of TiO₂.

Key words: Photosensitizer, Semiconductor, Free radical, ESR

Jian Huahua, Liu Yang, Xu Guangzhi, Chen Ciping, Zhou Benmao. STUDY ON THE PHOTO-INDUCED FREE RADICAL IN THE SYSTEM OF PHENOTHIAZINE/TiO₂[J]. Chinese Journal of Magnetic Resonance, 1999, 16(2): 97-102.

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STUDY ON THE PHOTO-INDUCED FREE RADICAL IN THE SYSTEM OF PHENOTHIAZINE/TiO₂

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