波谱学杂志 ›› 1999, Vol. 16 ›› Issue (2): 97-102.

• 研究论文 • 上一篇    下一篇

吩噻嗪/二氧化钛胶体体系光诱导自由基的研究

简华华1, 刘扬1, 徐广智1, 陈次平2, 周本茂2   

  1. 1 中国科学院化学研究所, 北京 100080;
    2 中国科学院感光化学研究所, 北京 100101
  • 收稿日期:1998-11-26 修回日期:1999-01-11 出版日期:1999-04-05 发布日期:2018-01-11
  • 作者简介:简华华,女,1974年出生,硕士研究生
  • 基金资助:
    国家自然科学基金资助项目(批准号29773050及29777023)

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

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

  1. 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 Online:1999-04-05 Published:2018-01-11

摘要: 用ESR研究了吩噻嗪(PTH)/乙二醇体系和PTH/乙二醇/TiO2(CdS,ZnO)体系中光诱导产生的自由基PTH·+,发现在前者中PTH·+是通过光电离产生的,但在后者中PTH·+除通过光电离产生外,还经1PTH*3PTH与TiO2(CdS,ZnO)间的单电子转移来形成,而且PTH·+还与TiO2(CdS,ZnO)发生进一步的单电子转移生成反磁性离子PTH2+

关键词: 光敏剂, 半导体, 自由基, ESR

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