影像科学与光化学 ›› 1999, Vol. 17 ›› Issue (1): 32-37.DOI: 10.7517/j.issn.1674-0475.1999.01.32

• 研究论文 • 上一篇    下一篇

(7-N,N-二甲氨基)香豆素基-3-甲酸乙酯/二芳基碘鎓盐光敏引发聚合反应体系

何勇, 周文慧, 李妙贞, 王尔鉴   

  1. 中国科学院感光化学研究所, 北京100101
  • 收稿日期:1998-04-07 修回日期:1998-05-14 出版日期:1999-02-20 发布日期:1999-02-20
  • 通讯作者: 周文慧
  • 基金资助:
    国家自然科学基金资助项目(批准号:29504033)

PHOTOSENSITIZATION INITIATION SYSTEM OF ETHYL 7-N,N-DIMETHYLAMINO COUMARINYL-3-FORMATE/DIARYLIODONIUM SALT

HE Yong, ZHOU Wenhui, LI Miaozhen, WANG Erjian   

  1. Institute of Photographic Chemistry, The Chinese Academy of Sciences, Beijing 100101, P. R. China
  • Received:1998-04-07 Revised:1998-05-14 Online:1999-02-20 Published:1999-02-20

摘要: 本工作合成了(7-N,N-二甲氨基)香豆素基-3-甲酸乙酯(EDACF)光敏剂。在光作用下,激发态的EDACF分子与二芳基碘盐OPPIP分子之间发生电子转移反应,伴随发生EDACF的褪色反应和OPPIP的光解反应,后者生成具有引发活性的芳基自由基。由于EDACF具有CT态特性,使得它与OPPIP之间的光电子转移反应速度随着溶剂极性增加明显减慢。EDACF/OPPIP体系可有效地引发MMA聚合反应,聚合反应动力学方程为Rp=K[OPPIP]0.47[EDACF]0.42[MMA]0.98.

关键词: 氨烷基香豆素, 二芳基碘鎓盐, 电子转移, 光聚合

Abstract: Photosensitizer ethyl 7-N,N-dimethylamino coumarinyl-3-formate (EDACF) was synthesized in this work. Upon irradiation, an electron transfer reaction occurred between excited EDACF and diaryliodonium salt (OPPIP) following with the photobleaching of EDACF and the photolysis of OPPIP, and the latter could yield the active aryl radical. CT characteristics of EDACF might cause the distinct decrease in rate of electron transfer reaction with the increase of solvent polarity. EDACF/OPPIP system can effectively initiate polymerization of MMA, and the kinetic equation of polymerization is Rp=K[OPPIP]0.47[EDACF]0.42[MMA]0.98.

Key words: alkylamino coumarin, diaryliodonium salt, electron transfer, photopolymerization