Effect of dendronization on the luminescence Behavior of fluorene-based polymers

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	Effect of dendronization on the luminescence Behavior of fluorene-based polymers
	Wu Yi-Shi ; Li Jing ; Al Xi-Cheng ; Fu Ya-Qin ; Zhou Jian-Jun ; Li Lin ; Bo Zhi-Shan ; Zhang Jian-Ping
刊名	CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE
	2007-10-01
卷号	28 期号:10 页码:1925-1928
关键词	Polyfluorene Dendronization Energy Transfer Time-resolved Fluorescence
ISSN号	0251-0790
英文摘要	Steady-state absorption and fluorescence together with picosecond time-resolved photoluminescence ( PL) spectroscopies were used to investigate the effect of dendronization on the luminescence character of fluorene-based polymers. For dilute tetrahydrofuran solution at 1 x 10(-5) mol/L, non-dendronized 9, 9-dioctylpolyfluorene ( PF), the first-generation dendronized PF ( PFg1), the second-generation dendronized PF (PFg2) and third -generation dendronized PF ( PFg3) show identical spectra in their steady-sate absorption and fluorescence measurement, indicating that the conjugated core is not affected by dendronization. However, highlypacking PF chains appear to form aggregate in film form. Further picosecond PL studies on dendronized PFs show that the fluorene-based emission in dilute solution follows a single exponential decay, whereas those in thin film decayed in a multi-phase manner and the lifetime prolongs with the generation of dendronization. These observations are discussed in terms of dispersive transport happening between adjacent chains in film. The dispersive relaxation can be controlled by site isolation of bulky dendrons. Our results prove that dendromzation is highly effective in controlling the inter-chain interactions of fluorene-based polymers.
语种	英语
出版者	HIGHER EDUCATION PRESS
WOS记录号	WOS:000250324400029
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/62663]
专题	中国科学院化学研究所
通讯作者	Wu Yi-Shi
作者单位	1.Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, State Key Lab Struct Chem Unstable & Stable Speci, Beijing 100080, Peoples R China 2.Renmin Univ China, Dept Chem, Sch Sci, Beijing 100872, Peoples R China 3.Chinese Acad Sci, Inst Chem, State Key Lab Polymer Chem & Phys, Beijing 100080, Peoples R China
推荐引用方式 GB/T 7714	Wu Yi-Shi,Li Jing,Al Xi-Cheng,et al. Effect of dendronization on the luminescence Behavior of fluorene-based polymers[J]. CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE,2007,28(10):1925-1928.
APA	Wu Yi-Shi.,Li Jing.,Al Xi-Cheng.,Fu Ya-Qin.,Zhou Jian-Jun.,...&Zhang Jian-Ping.(2007).Effect of dendronization on the luminescence Behavior of fluorene-based polymers.CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE,28(10),1925-1928.
MLA	Wu Yi-Shi,et al."Effect of dendronization on the luminescence Behavior of fluorene-based polymers".CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE 28.10(2007):1925-1928.