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π-Conjugated Unit-Dependent Optical Properties of Linear Conjugated Oligomers
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
Author NameAffiliationE-mail
Ning Sui Femtosecond Laser Laboratory, College of Physics, Jilin University, Changchun 130012, ChinaState Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun 130012, China  
Lu Zou Femtosecond Laser Laboratory, College of Physics, Jilin University, Changchun 130012, China  
Yun-fei Song* Department of Physics, Harbin Institute of Technique, Harbin 150000, China songyunfei@hit.edu.cn 
Qiu-lin Zhong Femtosecond Laser Laboratory, College of Physics, Jilin University, Changchun 130012, China  
Ying-hui Wang* Femtosecond Laser Laboratory, College of Physics, Jilin University, Changchun 130012, ChinaState Key Laboratory of Supramolecular Structure and Materials, Jilin University, Changchun 130012, China yinghuiwang@jlu.edu.cn 
Xiao-gang Wei Quantum Enginerring Center, Beingjing Institute of Control Device, Beijing 100854, China  
Zeng-bin Wang Quantum Enginerring Center, Beingjing Institute of Control Device, Beijing 100854, China  
Yu-guang Ma Quantum Enginerring Center, Beingjing Institute of Control Device, Beijing 100854, China  
Yan-qiang Yang State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun 130012, China  
Han-zhuang Zhang Femtosecond Laser Laboratory, College of Physics, Jilin University, Changchun 130012, China zhanghz@jlu.edu.cn 
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 flu-orescence 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 mecha-nism, showing that the enhancement of π-conjugated system should be responsible for the improvement of two-photon properties.
Key words:  Oligomer, Z-scan, Fluorescence dynamics
FundProject:
线性共轭齐聚物共轭单元依赖的光学特性
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*
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.
关键词:  齐聚物,Z-扫描,荧光动力学
DOI:10.1063/1674-0068/27/03/315-320
分类号: