影像科学与光化学 ›› 1997, Vol. 15 ›› Issue (2): 178-182.DOI: 10.7517/j.issn.1674-0475.1997.02.178

• 研究简报 • 上一篇    下一篇

呫吨染料-双(二苯基碘鎓盐)在高分子膜中的光谱和光化学特性

周文慧, 李妙贞, 周华娥, 王尔   

  1. 中国科学院感光化学研究所, 北京100101
  • 收稿日期:1996-10-30 修回日期:1997-01-03 出版日期:1997-05-20 发布日期:1997-05-20
  • 通讯作者: 王尔
  • 基金资助:
    国家自然科学基金资助项目(批准号:29504033)

SPECTRAL AND PHOTOCHEMICAL PROPERTIES OF XANTHENE DYE-BIS(DIPHENYL IODONIUM)SALTS IN POLYMER FILM

ZHOU Wenhui, LI Miaozhen, ZHOU Hua’e, WANG Erjian   

  1. Institute of Photographic Chemistry, The Chinese Academy of Sciences, Beijing 100101, P.R. China
  • Received:1996-10-30 Revised:1997-01-03 Online:1997-05-20 Published:1997-05-20

摘要: 近年来,在迅速发展的新材料中,许多品种是与激光技术和光化学反应密切相关的。而目前使用最多的光源为氩离子激光,He-Ne激光和半导体激光,因此开发可见光和近红外区有灵敏响应的光敏体系已成为十分迫切的问题。由于染料品种多,易得到,具有广泛的可选择性,因而染料光敏化反应体系再度引起人们的重视。

关键词: 染料敏化, 碘盐, 电子转移, 离子对

Abstract: The spectral and photochemical properties of eosin bis(diphenyl iodonium)salt and rose bengle bis(diphenyl iodonium) salt in polymer film have been studied. Their absorption spectra show a red-shift compared with those in solution and the peaks of dimers at long wavelength appear in the high XT(IPh2)2 concentration in the film. Upon irradiation with visible light, XT(IPh2)2 salts undergo electron transfer to generate leuco of dye, active phenyl radicals and iodobenzene. Owing to restriction of molecular movement in solid film, the photobleaching rates of xanthene dye anions bonded to iodonium cations(XT(IPh2)2) are much higher than those of two components system (XT(NEt44)2/IPh2BF4).

Key words: dye-sensitization, iodonium salts, electron trasfer, ion pair