Interplay between the keto defect and the interchain interaction on the green emission of fluorene-based polymer

doi:10.1021/jp073115z

CORC > 化学研究所 > 中国科学院化学研究所

	Interplay between the keto defect and the interchain interaction on the green emission of fluorene-based polymer
	Wu, Yi-Shi ; Li, Jing ; Ai, Xi-Cheng ; Fu, Li-Min ; Zhang, Jian-Ping ; Fu, Ya-Qin ; Zhou, Jian-Jun ; Li, Lin ; Bo, Zhi-Shan
刊名	JOURNAL OF PHYSICAL CHEMISTRY A
	2007-11-15
卷号	111 期号:45 页码:11473-11479
ISSN号	1089-5639
DOI	10.1021/jp073115z
英文摘要	To investigate the interplay between on-chain keto defect and interchain interaction and its consequence on the blue emission of polyfluorene (PF), first- to third-generation dendronized PFs as well as single-fluorenone-unit doped PF (PFN), synthesized by Suzuki polycondensation, were used as model compounds for steady-state and picosecond time-resolved photoluminescence (PL) spectroscopic studies. For PF film, the broadband green emission did not appear, although severe interchain interaction was observed. For PFN film, the green emission that peaked at similar to 540 nm decayed in a multiphasic manner, suggesting significant heterogeneity in the excitation migration toward the keto center. To further examine the interplay effect, a series of novel dendronized-PF/PFN blend films in a molar ratio of 40:1 fluorene-to-fluorenone unit were studied. With reference to pure PFN film, those of the green emission of the blends showed strong dependence on the order of dendronization, that is, a higher generation resulted in a shorter-lived green emission. These observations are discussed in terms of interchain and/or intersegment interactions between the fluorene segments and the keto defect. It is concluded that the keto unit and the keto-centered, interchain aggregation lead to severe color degradation in a synergistic manner, and that dendronization can effectively minimize the undesirable green emission.
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000250809400010
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/62343]
专题	中国科学院化学研究所
通讯作者	Zhang, Jian-Ping
作者单位	1.Renmin Univ China, Dept Chem, Beijing 1000872, Peoples R China 2.Chinese Acad Sci, Beijing Natl Lab Mol Sci BNLMS, State Key Lab Struct Chem Unstable & Stable Speci, Beijing 100080, Peoples R China 3.Chinese Acad Sci, State Key Lab Polymer Phys & Chem, Inst Chem, Beijing 100080, Peoples R China
推荐引用方式 GB/T 7714	Wu, Yi-Shi,Li, Jing,Ai, Xi-Cheng,et al. Interplay between the keto defect and the interchain interaction on the green emission of fluorene-based polymer[J]. JOURNAL OF PHYSICAL CHEMISTRY A,2007,111(45):11473-11479.
APA	Wu, Yi-Shi.,Li, Jing.,Ai, Xi-Cheng.,Fu, Li-Min.,Zhang, Jian-Ping.,...&Bo, Zhi-Shan.(2007).Interplay between the keto defect and the interchain interaction on the green emission of fluorene-based polymer.JOURNAL OF PHYSICAL CHEMISTRY A,111(45),11473-11479.
MLA	Wu, Yi-Shi,et al."Interplay between the keto defect and the interchain interaction on the green emission of fluorene-based polymer".JOURNAL OF PHYSICAL CHEMISTRY A 111.45(2007):11473-11479.