物理化学学报 >> 1990, Vol. 6 >> Issue (05): 601-604.doi: 10.3866/PKU.WHXB19900516

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有机化合物的光物理研究 XI. 芘在不同极性溶剂中的瞬态过程

陈凤启; 虞群; 郭燕; 樊美公   

  1. 中国科学院感光化学研究所,北京 100101
  • 收稿日期:1989-07-31 修回日期:1989-11-27 发布日期:1990-10-15
  • 通讯作者: 樊美公

Photophysical Research on Organic Compounds

Chen Feng-Qi; Yu Qun; Guo Yan; Fan Mei-Gong   

  1. Institute of Photographic Chemistry, Academia Sinica, Beijing 100101
  • Received:1989-07-31 Revised:1989-11-27 Published:1990-10-15
  • Contact: Fan Mei-Gong

Abstract: The transient processes of pyrene (Py) have been studied by measuring fluores-cence lifetime and nanosecond time-resolved transient absorption spectra in n-hexane, cyclohexane, acetone, and acetonitrile. The single exponential decay for pyrene-hexane and pyrene-oyclohexane systems were observed, yet the double exponential decay were shown for the pyrene-acetone and pyrene-acetonitrile systems (Table 1 of the Chinese text). In the transient absorption spectra, the absorbance of excited triplet pyrene was observed for the pyrene-acetonitrile system (Fig.2 of the Chinese text). This result clearly demonstrate that there are interaction between pyrene and acetonitrile and pyrene cation radical is formed by electron transfer from the excited singlet state of pyrene to acetonitrile. According to experimental results, the photophysical mechanism for the four systems was suggested.