高等学校化学学报

高等学校化学学报 ›› 1997, Vol. 18 ›› Issue (8): 1241.

• 论文 •    下一篇

光诱导下卟啉蒽醌化合物分子内电子转移过程的研究(Ⅱ)──顺磁共振法

王杏乔1, 王丛笑1, 王清民1, 于连香1, 曹锡章1, 闵春宗2, 王立平2   

  1. 1. 吉林大学化学系, 长春 130023;
    2. 四平师范学院物理系, 四平 136000
  • 收稿日期:1996-06-26 出版日期:1997-08-24 发布日期:1997-08-24
  • 通讯作者: 王杏乔, 女, 53岁, 副教授.
  • 作者简介:王杏乔, 女, 53岁, 副教授.
  • 基金资助:

    国家自然科学基金

A Study of Intramolecular Electron Transfer Process of Porphyrin-anthraquinone Under Photoinduction(Ⅱ)─Paramagnetic Resonance Method

WANG Xing-Qiao1, WANG Cong-Xiao1, WANG Qing-Min1, YU Lian-Xiang1, CAO Xi-Zhang1, MIN Chun-Zong2, WANG Li-Ping2   

  1. 1. Department of Chemistry, Jilin University, Changchun 130023;
    2. Department of Physics, Siping Teachers' College, Siping 136000
  • Received:1996-06-26 Online:1997-08-24 Published:1997-08-24

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被引次数

2

摘要： 用ESR研究了几种新型叶啉蒽醌化合物低温下光诱导产生分子内电子转移产物P+－AQ-自由基对.对比研究了不同卟啉配体、金属卟啉、有机碱轴向配位和溶剂对电子转移的影响.

关键词: 光诱导, 卟啉蒽醌化合物, 分子内电子转移, 顺磁共振

Abstract: In this paper, the method of paramagnetic resonance was used to study the pro-cess of formation of ionic free radicals of a new type of porphyrin-anthraquinone compounds through intramolecular electron transfer under photoinduction at a low temperature and the effects of different porphyrin ligands, metal-porphyrin, organic bases axial coordination and solvents on the electron transfer were studied. The experimental results indicate that ESRsignal intensities of porphyrin and metal-porphyrin were increased with time and tend to be stable after 50 min. The signal intensities of PAQ are in the order:H2TDMAPPQ>H2(o-NH)PTriPPQ>H2(p-NH)PPQ, while signal intensity of ZnPAQis greater than that of the corresponding PAQ. The formation rate and quantum yield of ionic free group pair P+·-AQ-· for PAQand ZnPAQin the strong polar solvent(DMF) are lower than those in weak polar solvent(CH2Cl2). The axial coordination with piperidine and imidazole increased ESRsignal intensity of ZnTDMAPPQ, which played a promoting role for the charge separation ofZnPAQ. Furthermore, β-carotene may further enhance the charge separation of ZnTDMAP-PQwith positively charged side chain. Therefore, this kind of PAQcompounds are ideal ones for photosynthesis.

Key words: Photoinduction, Porphyrin-anthraquinone compound, Intramolecular electron transfer, Paramagnetic resonance

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