含噁二唑四枝分子的合成与非线性吸收  

Synthesis and Fluorescence Properties of Two Oxadiazole-Based Multibranched Chromophores

作　　者：芮雯雯[1] 蒋宛莉[2] 丁雪霞[1] 王筱梅[1] 

机构地区：[1]苏州大学材料工程学院,江苏苏州215021 [2]山东大学晶体材料国家重点实验室,山东济南250100

出　　处：《感光科学与光化学》2007年第3期176-182,共7页Photographic Science and Photochemistry

基　　金：国家自然科学基金(50273024;50673070)

摘　　要：选择噁二唑基团作为多枝化合物的“枝”,以苯甲腈基和咔唑基团为分子的“核”,合成了两个四枝化合物(BO-G2和NO-G2),进行了核磁共振和质谱的表征.从结构上看,BO-G2和NO-G2分别具有“D-A-A-’A-D”和“D-’A-D-A-D’”电荷转移特征,后者具有pn结.吸收光谱和荧光光谱证实,NO-G2具有较大的激发态和基态偶极矩差值,存在着明显的分子内电荷转移和非线性吸收.Two new multibranehed ehromophores, named as NO-G2 and BO-G2, with the same peripheral branch of oxadiazole-unit, but different molecular core, that is, carbazole for NO-G2 and benzonitrile for BO-G2, were synthesized and characterized by mass spectra and ^1H NMR spectra, respectively. These two oxadiazole-based multibranched chromophores show the molecular architecture of ＂D-A-A＇ -A-D＂ for BO-G2 and＂D＇-A-D-A-D＇ ＂for NO-G2, which have the different ability of intramolecular charge transfer. The measured absorption and fluorescence spectra have shown that NO-G2 exhibits nonlinear absorption than BO-G2, owing to the former possessing pn junction and resultant more obvious intramolecular charge transfer.

关 键 词：含噁二唑四枝化合物 PN结 分子内电荷转移 非线性吸收 

分 类 号：O626[理学—有机化学]