影像科学与光化学 ›› 1988, Vol. 6 ›› Issue (4): 17-23.DOI: 10.7517/j.issn.1674-0475.1988.04.17

• 研究论文 • 上一篇    下一篇

疏水作用对光化学和光物理过程的影响 Ⅶ.芘基烷基酮的荧光光谱及其在不良溶剂中的簇集

佟振合, 欧阳心心, 刘顒顒   

  1. 中国科学院感光化学研究所, 北京
  • 收稿日期:1987-06-05 修回日期:1987-11-19 出版日期:1988-11-20 发布日期:1988-11-20
  • 基金资助:
    国家自然科学基金

HYDROPHOBIC EFFECT ON PHOTOCHEMICAL AND PHOTOPHYSICAL PROCESSES Ⅶ. FLUORESCENCE SPECTRA AND AGGREGATION OF PYRENYL ALKYL KETONES IN POOR SOLVENTS

TUNG CHEN-HO, OUYANG XIN-XIN, LIU YONG-YONG   

  1. Institute of Photographic Chemistry, Academia Sinica, Beijing
  • Received:1987-06-05 Revised:1987-11-19 Online:1988-11-20 Published:1988-11-20

摘要: 溶剂的极性对芘基烷基酮的单体荧光和激基缔合物荧光有很大影响,在非极性溶剂中单体荧光很弱,随着溶剂极性增大,单体荧光增强,单体荧光和激基缔合物荧光明显红移。利用芘基烷基酮荧光的这些性质研究了长链分子在二甲基亚砜-水(DMSO-H2O)中的簇集现象。在浓度非常低的情况下,长链芘基烷基酮发射激基缔合物荧光,单体荧光也明显蓝移,表明芘基烷基酮形成了簇集体。长链饱和烷烃和芘基烷基酮发生共簇集,簇集体内的极性比环己烷的极性稍大。

关键词: 疏水作用, 长链烃分子的簇集, 芘基烷基酮, 荧光探针, 簇集体内的极性

Abstract: The monomer and excimer fluorescence spectra of pyrenyl alkyl ketones are sensitive to-environmental polarity. The monomer fluorescence in nonpolar solvents is very weak, but it becomes quite intense in polar solvents. Both monomer and excimer fluorescence maxima’ show significant red shift with increasing solvent polarity. This strong dependence of fluorescence on solvent polarity is used to study aggregation of long chain molecules in dimethyl sulfoxide-water mixture. At very low concentration pyrenyl alkyl ketones with long chain show excimer fluorescence and the monomer fluorescence is blue shifted, indicating aggregate formation Saturated hydrocarbons with long chain coaggregate with these ketones. The polarity in aggregates is analogous to that in cyclohexane.

Key words: hydrophobic interaction, aggregation of hydrocarbon with long chain, pyrenyl alkyl ketones, fluorescence probe, polarity in aggregate