影像科学与光化学 ›› 1997, Vol. 15 ›› Issue (3): 210-216.DOI: 10.7517/j.issn.1674-0475.1997.03.210

• 研究论文 • 上一篇    下一篇

芘四硫酸四钠盐/甲基紫精复合物光物理性质的研究

刘志斌1, 邓湘君2   

  1. 1. 中国科学院长春物理研究所, 长春 130021;
    2. 吉林省生物研究所, 长春 130021
  • 收稿日期:1996-10-23 修回日期:1997-04-08 出版日期:1997-08-20 发布日期:1997-08-20
  • 通讯作者: 刘志斌

STUDIES OF PHOTOPHYSICAL PROPERTIES ON THE COMPLEX OF PyTS/MV2+

LIU Zhibin1, DENG Xiangjun2   

  1. 1. Changchun Institute of Physics, The Chinese Academy of Sciences, Changchun 130021, P. R. China;
    2. Jilin Institute of Biology, Changchun 130012, P. R. China
  • Received:1996-10-23 Revised:1997-04-08 Online:1997-08-20 Published:1997-08-20

摘要: 本文通过吸收光谱滴定和时间分辨瞬态吸收光谱对芘四硫酸四钠盐(pyrenetetrasulfonic acid tetrasodium salt,PyTS)/甲基紫精(methylviologen,MV2+)复合物在水溶液中的光物理性质进行研究。用甲基紫精滴定芘四硫酸四钠盐时,得到该复合物的组成成份是1:1,反之,用芘四硫酸四钠盐滴定甲基紫精时,同样得到1:1组成成份的复合物。该复合物的形成常数是2.4×106mol-1·L,当用光激发该复合物时,发现其中存在芘四硫酸四钠盐到甲基紫精的电子转移过程,并得到该过程的动力学模型。

关键词: 芘四硫酸四钠盐, 甲基紫精, 复合物, 电子转移过程

Abstract: In this paper, the photophysical properties of the complex of pyrenetetrasulfonic acid tetrasodium salt (PyTS) and methylviologen (MV2+) in water have been studied using absorption titration and time resolved transient absorption spectra. The stoichiometry of PyTS/MV2+ complex is 1:1 when PyTS was titrated by MV2+ ;and the same result we got when MV2+ was titrated by PyTS. The association constant of the PyTS/MV2+ is 2.4×106 mol-1·L. In the PyTS/MV2+ dimer, there is an electron transfer process from PyTS to MV2+ when it was excited by laser. From these results, we proposed the dynamic scheme of the PyTS/MV2+ dimer, however, some of processes cannot be determined owing to pulse duration limited of the used laser. Some ultrafast experiments are undergoing, especially femtosecond experiment.

Key words: pyrenetetrasulfonic acid tetrasodium salt, methylviologen, complex, intermolecular charge transfer