Acta Chimica Sinica ›› 1996, Vol. 54 ›› Issue (4): 313-319.     Next Articles

Original Articles

离子对内电子转移型染料阴离子-翁盐阳离子光敏体系中的溶剂效应和结构效应

贺军辉;周文慧;陈红梅;王尔鉴;N.S.Allen;M.DERHAM   

  1. 中国科学院感光化学研究所;曼城大学化学系
  • 出版日期:1996-04-15 发布日期:1996-04-15

Solvent effects and structure effects in intra-ion-pair electron transfer dye anion-iodonium

HE JUNHUI;ZHOU WENHUI;CHEN HONGMEI;WANG ERJIAN;N.S.Allen;M.DERHAM   

  • Online:1996-04-15 Published:1996-04-15

Effects of solvent and structure on the photophysical and photochemical properties of dye-onium salts have been studied in this report. It is shown that in solution the ion pairs can exist in such different forms as contact ion pair, solvent-separated ion pair or free solvated ions. Solvent polarity influences not only the spectral properties of different forms, but the equilibrium between them as well, leading to change of physicochemical properties of the ion pairs. Ion pairs with different structure of either dye anion or onium cation have different properties. The greater the thermodynamic driving force, the faster the photoinduced electron transfer reaction is. The ion pair system has been modeled using the Molecular Modeling technique, providing some important information for understanding the physicochemical behaviors of the ion pair systems.

Key words: SOLVENT EFFECT, STRUCTURAL EFFECT, ION PAIRS

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