Aggregation-Induced Long-Lived Phosphorescence in Nonconjugated Polyurethane Derivatives at 77 K
文献类型：期刊论文
| 作者 | Jiang, Nan1; Li, Guang-Fu1; Zhang, Bao-Hua2; Zhu, Dong-Xia1; Su, Zhong-Min1; Bryce, Martin R.3 |
| 刊名 | MACROMOLECULES
 |
| 出版日期 | 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 |
| WOS记录号 | WOS:000435417800028 |
| 出版者 | AMER CHEMICAL SOC |
| 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. |
入库方式： OAI收割
来源：化学研究所
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