物理化学学报 >> 1997, Vol. 13 >> Issue (09): 808-814.doi: 10.3866/PKU.WHXB19970908

研究论文 上一篇    下一篇

一种逆向光致变色螺吡喃化合物的光消色关环反应机理研究

李毅婷,周金渭,张复实,王艳乔,宋心琦   

  1. 清华大学化学系,北京 100084|中国科学院化学研究所,北京 100080
  • 收稿日期:1996-12-05 修回日期:1997-04-02 发布日期:1997-09-15
  • 通讯作者: 李毅婷

Mechanistic Study on the Ring Closure Process of a Negative Photochromic Spiropyran

Li Yi-Ting,Zhou Jin-Wei,Zhang Fu-Shi,Wang Yan-Qiao,Song Xin-Qi   

  1. Department of Chemistry,Tsinghua University,Beijing 100084|Institute of Chemistry Academia Sinica,Beijing 100080
  • Received:1996-12-05 Revised:1997-04-02 Published:1997-09-15
  • Contact: Li Yi-Ting

摘要:

研究了逆向光致变色化合物1'-十八烷基-3',3'-二甲基-6,8二硝基螺[2H-1-苯并吡喃-2,2'-吲哚啉]的可见光消色机理.通过吸收光谱测定其在不同溶剂及含不同添加剂时,可见光照射后有色体[MC]关环的光量子产率. 结果表明O2、三苯基胺等三线态猝灭剂对关环反应光量子产率几乎没有影响.据此提出关环反应主要是通过单线态的途径进行的结论.

关键词: 逆向光致变色, 吲哚啉螺吡喃, 光量子产率

Abstract:

The mechanism of ring closure process of negative photochromic indoline spiropyran is investigated by its UV-visible spectra. The quantum yields of light bleaching process of the colored form in different solvents and with different additives are measured. The results indicate that the oxygen and other triplet quenching agent such as triphcnyladrine have little effect on the decoloration process. The occurrence of the photodecoloration reaction of the system primarily via a singlet channel can be identified.

Key words: Negative photochromism, Indoline spiropran, Quantum yield