Aggregation-Induced Long-Lived Phosphorescence in Nonconjugated Polyurethane Derivatives at 77 K

doi:10.1021/acs.macromol.8b00715

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	Aggregation-Induced Long-Lived Phosphorescence in Nonconjugated Polyurethane Derivatives at 77 K
	Jiang, Nan 1; Li, Guang-Fu 1; Zhang, Bao-Hua 2; Zhu, Dong-Xia 1; Su, Zhong-Min 1; Bryce, Martin R.3
刊名	MACROMOLECULES
	2018-06-12
卷号	51 期号:11 页码:4178-4184
ISSN号	0024-9297
DOI	10.1021/acs.macromol.8b00715
英文摘要	Achieving long-persistent phosphorescence in polymers is a challenge even at low temperatures. In this work, long-persistent phosphorescence (>1 s) is observed in nonconjugated polyurethane derivatives at 77 K, which is among the longest reported phosphorescent lifetimes for an organic polymer. The mechanism for this unusual behavior has been shown by steady-state photophysical characterization and time-resolved emission spectra to arise from the formation of intra- and/or intermolecular carbonyl clusters at low temperature. The lifetime of long-persistent phosphorescence is increased by the introduction of an aromatic monomer into the nonconjugated polyurethane chains. This is attributed to intra- and/or intermolecular n-pi* transitions from electron-rich carbonyl groups to the conjugated aromatic units, thereby enhancing the intersystem crossing rate. Coating an ultraviolet InGaAsN light-emitting diode with a polyurethane derivative as the emitter gives cryogenic afterglow with long-persistent phosphorescence that is observed for up to 7 s with the naked eye.
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000435417800028
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/42507]
专题	中国科学院化学研究所
通讯作者	Zhu, Dong-Xia; Su, Zhong-Min; Bryce, Martin R.
作者单位	1.Northeast Normal Univ, Univ Jilin Prov, Fac Chem, Key Lab Nanobiosensing & Nanobioanal, Renmin St 5268, Changchun 130024, Jilin, Peoples R China 2.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Jilin, Peoples R China 3.Univ Durham, Dept Chem, Durham DH1 3LE, England
推荐引用方式 GB/T 7714	Jiang, Nan,Li, Guang-Fu,Zhang, Bao-Hua,et al. Aggregation-Induced Long-Lived Phosphorescence in Nonconjugated Polyurethane Derivatives at 77 K[J]. MACROMOLECULES,2018,51(11):4178-4184.
APA	Jiang, Nan,Li, Guang-Fu,Zhang, Bao-Hua,Zhu, Dong-Xia,Su, Zhong-Min,&Bryce, Martin R..(2018).Aggregation-Induced Long-Lived Phosphorescence in Nonconjugated Polyurethane Derivatives at 77 K.MACROMOLECULES,51(11),4178-4184.
MLA	Jiang, Nan,et al."Aggregation-Induced Long-Lived Phosphorescence in Nonconjugated Polyurethane Derivatives at 77 K".MACROMOLECULES 51.11(2018):4178-4184.