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通过Wittig反应合成了咔唑衍生物9-乙基-3-{5-(4-叔丁基苯基)-[1,3,4]二唑-2-苯乙烯基}-咔唑(2)和9-乙基-3,6-双{5-(4-叔丁基苯基)-[1,3,4]噁二唑-2-苯乙烯基}-咔唑(3),用核磁共振和红外光谱进行了结构表征.实验测定了咔唑衍生物的双光子吸收和双光子诱导荧光性质.这些化合物的双光子吸收截面较大,在800nm波长的激光激发下发出很强的蓝色双光子上转换荧光.实验中观察到了多枝结构在双光子吸收中的协同效应.这样的协同效应部分原因是由于多分枝间电子耦合作用,多分枝分子中重复单元的推拉电子结构和协同效应有效地增强了分子的双光子吸收性质.
The carbazole derivative (9-ethyl-3- {5- (4-tert-butylphenyl) - [1,3,4] oxadiazole-2-styryl} ) And 9-ethyl-3,6-bis {5- (4-tert- butylphenyl) - [1,3,4] oxadiazole- 2-styryl} -carbazole (3) NMR and FT-IR spectra. The two-photon absorption and two-photon-induced fluorescence of carbazole derivatives were determined experimentally. The two-photon absorption cross-sections of these compounds are large and emit strong blue Color two-photon upconversion fluorescence.The synergistic effect of the multi-branch structure in the two-photon absorption was observed in the experiment.This synergistic effect was partly due to the multi-branch electron coupling effect, the push-pull electronic structure and coordination of the repeat units in the multi-branch molecule The effect effectively enhances the two-photon absorption properties of the molecule.