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我们合成了以不同链长连接的荧光素酯与蒽甲酸酯的四种二元化合物.在溶液中的构象研究表明.链呈不同程度的弯曲.但分子内两个发色团的相互作用是微弱的.激发蒽甲酸酯时,无论是在分子间还是在分子内,其单重态能量几乎都传递给了荧光素酯.激发荧光素酯时,并未观测到分子内的光致电子转移,尽管计算和模型化合物分子间的对照实验都表明它们之间是可以发生这种电子转移的.最可能的原因是这个系列在溶液中,分子内的两个发色平面没有好的匹配,或者说,这些二元化合物在所研究的溶液中,不能满足分子内的光致电子转移对构象的要求.
We synthesized four binary compounds of fluorescein ester and anthracene formate with different chain lengths. The conformational studies in solution showed that the chains were bent to different degrees, but the interaction of the two chromophores in the molecule Is weak. When the anthracene formate is excited, almost all of the singlet energy is transferred to the fluorescein ester, either intramolecularly or intramolecularly. No intramolecular light photolysis is observed when the fluorescein ester is excited Electron transfer, though control experiments between calculated and model compound molecules show that this electron transfer can take place between them.The most likely reason is that the series does not have a good match between the two chromophore planes in solution in solution In other words, these binary compounds can not satisfy the intramolecular photoconduction conformational requirements in the solution studied.