Effects of the structure of the branches on the two-photon absorption properties for the multi-branched molecules with nitrogen (N) as coupling center

作     者：SUN XueQin ZHAO Xian ZHOU ShuLan LI BaiDong CHENG XiuFeng 

作者机构：State Key Laboratory of Crystal MaterialsShandong UniversityJinan 250100China Department of Science and Technology of Shandong ProvinceJinan 250011China 

出 版 物：《Science China Chemistry》 (中国科学（化学英文版）)

年 卷 期：2008年第51卷第1期

页      面：92-96页

核心收录：

学科分类：07[理学] 070304[理学-物理化学(含∶化学物理)] 0703[理学-化学] 

基　　金：Supported by the National Nature Science Foundation of China (Grant Nos. 20473046, 50323006) the Education Foundation of China (Grant No. 305010) 

主　　题：structure of branches TPA properties ZINDO/SOS multi-branched molecules 

摘      要：In order to investigate the effects of the structure of branches on the TPA properties for multi-branched molecules, the TPA cross section is calculated by using ZINDO/SOS method. The investigated mole- cules have different branches (chomorfores based on stilbene, dithienothiophene and flourene) with nitrogen(N) as coupling center. The results show that the cooperative enhancement in multi-branched molecules depends on the structures of the branches and the structures of branches play an important role in the enhancement of the TPA cross section. The designed molecules with stilbene and dithie- nothiophene as branched possess relatively larger two-photon absorption cross sections.