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线性共轭齐聚物共轭单元依赖的光学特性(英文)

π-Conjugated Unit-Dependent Optical Properties of Linear Conjugated Oligomers

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【作者】 隋宁邹璐宋云飞钟秋霖王英惠魏小刚王增斌马於光杨延强张汉壮

【Author】 Ning Sui;Lu Zou;Yun-fei Song;Qiu-lin Zhong;Ying-hui Wang;Xiao-gang Wei;Zeng-bin Wang;Yu-guang Ma;Yan-qiang Yang;Han-zhuang Zhang;Femtosecond Laser Laboratory, College of Physics, Jilin University;State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University;Department of Physics, Harbin Institute of Technique;State Key Laboratory of Supramolecular Structure and Materials, Jilin University;Quantum Enginerring Center, Beingjing Institute of Control Device;

【机构】 吉林大学物理学院飞秒激光实验室吉林大学无机合成和制备化学国家重点实验室哈尔滨工业大学物理系吉林大学超分子结构与材料国家重点实验室北京控制仪器研究所量子工程中心

【摘要】 研究三种线性共轭齐聚物(F-P、F-P-F和P-F-P-F-P)的光学特性,其中吩噻嗪单元(F)和芴单元(P)交替排列.随着共轭体系的增强,它们的吸收和发射带都逐渐红移,双光子吸收特性明显的改进.利用连续速率分布模型分析荧光动力学的结果显示,它们的弛豫速率在逐渐增加,速率分布宽度也在变窄.量子化学计算给出了它们的分子结构和跃迁机制,显示π共轭系统的增强促使了双光子特性的改进。

【Abstract】 The optical properties of three linear conjugated oligomers(F-P, F-P-F, and P-F-P-F-P),where phenothiazine(P) and fluorene(F) groups arrange alternately, are investigated. With the enhancement of the π-conjugated system, their absorption and emission bands both gradually red shift, and their two-photon properties are also improved. Meanwhile, their fluorescence dynamic traces are analyzed with continuous rate distribution model, exhibiting that their decay rates gradually accelerate and the rate distribution width become narrower.The quantum chemical calculation offers their molecular structures and transition mechanism, showing that the enhancement of π-conjugated system should be responsible for the improvement of two-photon properties.

【关键词】 齐聚物Z-扫描荧光动力学
【Key words】 OligomerZ-scanFluorescence dynamics
【基金】 supported by the National Natural Science Foundation of China (No.21103161, No.11274142, No.11304058, No.11274034, and No.11004080);the China Postdoctoral Science Foundation (No.2011M500927 and No.2013T60319)
  • 【文献出处】 Chinese Journal of Chemical Physics ,化学物理学报(英文版) , 编辑部邮箱 ,2014年03期
  • 【分类号】O631.24
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