Main-chain hyperbranched polyrotaxane: Synthesis, photophysical properties, and energy funnel
文献类型：期刊论文
| 作者 | Han, Ji-Min1; Wang, Xiao-Ye1; Zhang, Yong-Hong2; Liu, Chenjiang2; Pei, Jian1 |
| 刊名 | POLYMER
 |
| 出版日期 | 2012-08-02 |
| 卷号 | 53期号:17页码:3704-3711 |
| 关键词 | Hyperbranched Polyrotaxane Energy Transfer |
| ISSN号 | 0032-3861 |
| DOI | 10.1016/j.polymer.2012.06.015 |
| 文献子类 | Article |
| 英文摘要 | A main-chain hyperbranched polyrotaxane (HBP) assembled by the interaction between dibenzo[24]crown-8 (DB24C8) and dibenzyl ammonium (DBA) was synthesized through Cu(I)-catalyzed azide-alkyne cycloaddition. Energy donors and acceptors were attached to DB24C8 and DBA units, respectively, to investigate the effect of such polyrotaxane structure on the intramolecular and intermolecular energy transfer channel. Our investigations indicated that HBP with higher molecular weight was obtained in relatively lower concentration. AFM, DLS, and SLS analyses revealed that our HBP molecule was described as a ball-shaped nanoparticle with the radius of about 4-8 nm. Benefitting from such unique topology, the aggregation of the chromophores through pi-pi stacking was effectively suppressed both in solution and in solid state. Meanwhile, the steady-state and time-resolved fluorescence characterization demonstrated that HBP exhibited the excellent energy funneling ability from A3 to B2 unit with high energy transfer efficiency and fast rate, which was attributed to the large spectral overlap between the emission features of the donors and the absorption of the acceptors, and the unique highly branched mechanically interlocked architecture. The energy transfer quantum yield of HBP was calculated to be as high as 99%, and this energy transfer process was estimated to occur with a rate of 7.58 x 10(9) s(-1) with single exponential. (C) 2012 Elsevier Ltd. All rights reserved. |
| WOS关键词 | STIFF DENDRITIC MACROMOLECULES ; ELECTRON-TRANSFER PROCESSES ; LIGHT-HARVESTING COMPLEX ; CHARGE-SEPARATED-STATE ; POLYPHENYLENE DENDRIMERS ; ROTAXANE STRUCTURES ; PORPHYRIN ; POLYMERS ; CHEMISTRY ; MOIETIES |
| WOS研究方向 | Polymer Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000308274400008 |
| 出版者 | ELSEVIER SCI LTD |
| 源URL | [http://cas-ir.dicp.ac.cn/handle/321008/167256]  |
| 专题 | 大连化学物理研究所_中国科学院大连化学物理研究所 |
| 通讯作者 | Liu, Chenjiang |
| 作者单位 | 1.Peking Univ, Beijing Natl Lab Mol Sci, Key Lab Bioorgan Chem & Mol Engn, Minist Educ,Coll Chem & Mol Engn, Beijing 100871, Peoples R China 2.Xinjiang Univ, Key Lab Petr & Gas Fine Chem, Minist Educ, Coll Chem & Chem Engn, Urumqi 830046, Peoples R China |
| 推荐引用方式 GB/T 7714 | Han, Ji-Min,Wang, Xiao-Ye,Zhang, Yong-Hong,et al. Main-chain hyperbranched polyrotaxane: Synthesis, photophysical properties, and energy funnel[J]. POLYMER,2012,53(17):3704-3711. |
| APA | Han, Ji-Min,Wang, Xiao-Ye,Zhang, Yong-Hong,Liu, Chenjiang,&Pei, Jian.(2012).Main-chain hyperbranched polyrotaxane: Synthesis, photophysical properties, and energy funnel.POLYMER,53(17),3704-3711. |
| MLA | Han, Ji-Min,et al."Main-chain hyperbranched polyrotaxane: Synthesis, photophysical properties, and energy funnel".POLYMER 53.17(2012):3704-3711. |
入库方式： OAI收割
来源：大连化学物理研究所
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