影像科学与光化学 ›› 1997, Vol. 15 ›› Issue (1): 67-70.DOI: 10.7517/j.issn.1674-0475.1997.01.67

• 研究论文 • 上一篇    下一篇

氧鎓盐分子在受限制体系中的电荷转移和发光行为

陈懿, 汪鹏飞, 吴世康   

  1. 中国科学院感光化学研究所, 北京100101
  • 收稿日期:1996-03-11 修回日期:1996-05-27 出版日期:1997-02-20 发布日期:1997-02-20
  • 通讯作者: 吴世康
  • 基金资助:
    国家自然科学基金

THE CHARGE TRANSFER AND LUMINESCENCE BEHAVIOR OF PYRYLIUM SALT UNDER CONFORMATION CONSTRAINED CONDITION

CHEN Yi, WANG Pengfei, WU Shikang   

  1. Institute of Photographic Chemistry, The Chinese Academy of Sciences, Beijing 100101, P. R. China
  • Received:1996-03-11 Revised:1996-05-27 Online:1997-02-20 Published:1997-02-20

摘要: 2,4,6-三芳基氧盐是一类类似于三苯甲烷染料的化合物[1].其结构中存在两种跃迁矩,分别对应于分子的X-轴方向(2,6-位取代基)和Y-轴方向(4-位取代基).因此,2,4,6-三芳基氧盐的吸收光谱中存在着两个较具特征的吸收峰[2].

关键词: 氧鎓盐, 分子内电荷转移, 分子内能量转移, 受限制体系, 光物理性质

Abstract: The photophysical properties of 2-phenyl-4-(4’-N,N-dimethylaminophenyl)-6-(4’-chlorophenyl)pyrylium tetrafluoborate were studied in 1,2-dichloroethane and PMMA film respectively. It is shown that both intramolecular charge transfer and energy transfer occur in excited state in 1,2-dichloroethane and PMMA film. The difference between them is that in 1,2-dichloroethane the fluorescence emission corresponding to X-axis is detected only and the fluorescence emission from Y-axis is completely quenched due to the formation of TICT (twisted intramolecular charge transfer). Whereas, the fluorescence emissions corresponding to both X-axis and Y-axis are observed in PMMA film. This indicates that the TICT formation could not be formed in excited state under the conformation constrained condition.

Key words: pyrylium salt, intramolecular charge transfer, intramolecular energy transfer, conformation constrained condition, photophysical property