单冠醚取代酞菁形成的络合物中的荧光猝灭

The Fluorescence Quenching in the Complex of Crown-ether Substituted Phthalocyanine and Electron Acceptor

在溶液中，单冠醚取代酞菁依靠冠醚的络合作用可以和含碱金属离子的受体分子形成络合物．这种络合物的形成有利于酞菁和受体分子间的光致电子转移反应，使得酞菁的荧光被强烈地猝灭．根据体系的化学平衡和酞菁荧光被受体分子猝灭的机制建立了数学模型，运用实验数据和最小二乘法曲线拟合得到了酞菁和受体分子形成的络合物的稳定常数．

Phthalocyanies bearing one crown-ether void can form complex with electron acceptors which contain alkai metal ions. The electron transfer reactions could be accelerated by the formation of the complex and the fluorescence of phthalocyanine was quenched significantly in this system. No fluorescence quenching of phthalocyanines without crown-ether substituted was observed under the same conditions. The steady constants of the complex can be calculated by non-linear least square fit method.