具有不同限制结构的N，N－二甲基氨基烯酮类化合物的非辐射衰减过程的研究

A Study of the Nonradiative Decay Process of N,N-Dimethylamino Enone Derivatives with Different Limited Structures

研究了具有不同限制结构的Ｎ，Ｎ－二甲氨基烯酮类化合物的非辐射衰变过程，通过研究过类化合物在不同温度下的荧光量子产率与温度的关系，计算出表观活化能，结果表明，对于不同受阻结构的各化合物，在不同极性和不同粘度的介质条件下具有不同的非辐射机制，在非极性溶剂中，其非辐射机制主要是由ｎπ－ππ相互作用引起的分子内转换；而在高粘度极性溶剂中，分子内旋转损耗是主要的非辐射衰减机制。

In this work, the nonradiative decay process of several N,N-dimethylamino enone derivatives with different limited structures as the electron donating group has been studied in different viscosities and at different temperatures. The variation of nonradiative decay pro cess has been observed in the media with different viscosities and polarities. In nonpolar me dia with lower viscosity,the nonradiative decay is mainly caused by the internal conversion of nπ￣*-ππ￣* interaction.Whereas in polar media with high viscosity,the internal rotation loss is the majorly nonradiative decay process.