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分子间或分子内的电子激发态能量转移是重要的初级光化学过程之一。本工作利用荧光偏振技术研究了双-β-萘甲酸多次甲基二醇酯(B_n,n=2,3,4,5,10)在玻璃态异戊烷(77K)和聚甲基丙烯酸甲酯薄膜中的分子内能量迁移,发现能量迁移效率随多次甲基链长度的增加依次降低;测定了β-萘甲酸酯发色团能量迁移的临界距离约为30(?);讨论了分子内和分子间能量迁移对荧光去偏振的影响。B_n的分子结构式为:
Intermolecular or intramolecular electron excited state energy transfer is one of the important primary photochemical processes. In this work, the fluorescence polarization techniques were used to study the effect of multiple methylglyoxides (B_n, n = 2,3,4,5,10) on the isoprene (77K) and polymethacrylic The intramolecular energy transfer in the methyl ester film shows that the energy transfer efficiency decreases with the increase of the length of the methyl chain. The critical distance of β-naphthoate chromophore energy migration is about 30 The effect of intramolecular and intermolecular energy transfer on fluorescence depolarization. The molecular structure of B_n is: