蒈烯芳氰敏化光氧化反应的研究——Ⅰ.蒈烯对9,10-二腈基蒽荧光的猝灭特性

STUDY ON THE PHOTOSENSITIZATION OF CARENE BY AROMATIC CYANIDE Ⅰ. THE FLUORESCENCE QUENCHING BEHAVIOR OF 9,10-DICYANOAN THRACENE BY CARENE

本文通过研究在不同溶剂中蒈烯对9,10—二腈基蒽(DCA)荧光猝灭的光物理特性及溶剂极性对猝灭速度的影响,温度效应的测定及其在乙腈中双分子猝灭速率常数κ_q值与计算所得自由能的变化(△G)之间的关系符合 RehmWeller关系,证明了菇烯对DCA荧光的猝灭是一个电子转移的动态猝灭过程。

The fluorescene quenching properties of DCA by Carene in different solvents and the influence of solvent polarity on quenching rate constant as well as the temperature effect were investigated. The quenching rate constant kq, and △G values in acetonitrile coincide with the Rehm-Weller's theoretical results, Therefore the fluorescence quenching of DCA by Carene is of electron transfer dynamic quenching characteristic.