交叉共轭型烯酮化合物分子内的电荷转移

近年来有关分子内电行转移化合物的设计、合成及其光谱、光物理并为的研究引起＾们极大的兴趣1－4]．这类化合物在激发态时常表现出一些特殊的性能，如出现扭曲的分子内电行转移（TICT）现象，并在荧光光谱中出现奇特的K重发光和在荧光强度与温度的依赖关系上出现反常等5]．TICT态的形成强烈的依赖于化合物分子本身的结构，屯依赖于化合物分子所处环境的极性、温度和粘度等因素同．带有强给电子基（CH3卜N烁酮类化合物是一类有效的光敏剂．它广泛的应用于如光引发聚合、全息成像7-8]等不同领域．同时其光谱及光物理行为的研究也已兑…

A Study on the Photophysical Behavior of Cross-conjugate Enone Compounds

Several cross-conjugate enone compounds with different electron withdrawing substituents have been synthesized. The spectroscopy and photophysical behavior of these compounds in different conditions were studied. Results show that TICT formation which depends strongly on the solvent polarity and electron withdrawing ability of substituents was observed for compounds with different electron withdrawing groups. For compound (Ⅳ) which possesses strong electron withdrawing ability, the TICT formation can be ob served in weak polar solvent, such as in toluene. But, for compounds (Ⅱ) and (Ⅲ), it can be observed in THF and ethyl ether, respectively. It can also be observed that the fluorescence quantum yields of these compounds are varied with the solvent polarity, and a maximum appears in this variation. Results obtained have been discussed preliminary.