影像科学与光化学 ›› 1988, Vol. 6 ›› Issue (2): 21-28.DOI: 10.7517/j.issn.1674-0475.1988.02.21

• 研究论文 • 上一篇    下一篇

N,N′-双-β-萘甲基哌嗪分子内激发态复合物形成的混合溶剂效应

周庆复, 许慧君   

  1. 中国科学院感光化学研究所, 北京
  • 收稿日期:1986-12-11 修回日期:1987-10-13 出版日期:1988-05-20 发布日期:1988-05-20

MIXED SOLVENT EFFECT OF N,N’-BIS-β-NAPHTHYLMETH-YL-PIPERAZINE INTRAMOLECULAR EXCITED COMPLEX FORMATION

ZHOU QING-FU, Xu HUI-JUN   

  1. Institute of Photographic Chemistry. Acadcmia Sinica, Beijing
  • Received:1986-12-11 Revised:1987-10-13 Online:1988-05-20 Published:1988-05-20

摘要: 本文测定了N,N′-双-β-萘甲基哌嗪(DMNP)在苯与乙腈混合溶剂中的荧光光谱。在乙腈含量<5(mol·dm-3)时,乙腈猝灭DMNP苯溶液的荧光符合Stern-Volmer方程,表明极性溶剂分子乙腈与DMNP分子内激基复合物存在着相互作用。随着乙腈含量的增加,DMNP分子内激基复合物(exci-plex)荧光的猝灭与红移以及分子内激基缔合物(excimer)的逐步形成则仅与体系的极性有关。文中还讨论了DMNP激发态复合物形成的机理。

关键词: N,N’-β-萘甲基哌嗪, 分子内激基复合物, 分子内激基缔合物, 质子化过程, 荧光光谱

Abstract: The fluorescence spectra of N, N’-bis-β-naphthylmethyl-piperazine (DMNP) in benzene solution mixed with acetonitrile have been determined. When the acetonitrile concentration is less than 5mol·dm-3, the Stern-Volmer plot is linear. This can be explained by specific interaction between acetonitrile and the DMNP exciplex. With the increasing of acetonitrile concentration the quenching and red shift in emission maxima of DMNP intramolecular exciplex accompanied by the appearance of intramolecular excimer formation can be found to be related to the polarity of the system. The mechanism for the formation of excited state complex of DMNP has been proposed.

Key words: N,N’-bis-β-naphrhylmethyl piperazine, intramolecular exciplex, intramolecular excimer, protonation process, fluorescence spectra