The self-assembly and chiroptical properties of tetraphenylethylene dicycle tetracholesterol with an AIE effect

doi:10.1039/c9tc02134e

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	The self-assembly and chiroptical properties of tetraphenylethylene dicycle tetracholesterol with an AIE effect
	Yuan, Ying-Xue; Xiong, Jia-Bin; Luo, Jun; Hu, Ming; Jiang, Hejin; Liu, Minghua; Zheng, Yan-Song
刊名	JOURNAL OF MATERIALS CHEMISTRY C
	2019-07-21
卷号	7 期号:27 页码:8236-8243
ISSN号	2050-7526
DOI	10.1039/c9tc02134e
英文摘要	The immobilized propeller-like conformation of tetraphenylethylene (TPE) can be used to emit strong circularly polarized luminescence (CPL) light, but the immobilized propeller-like conformation must be resolved. A single-handed helical conformation of TPE units induced by chiral group(s) that do not need resolution can also enable CPL emission, but related research is very rare. In this paper, TPE dicycle tetracholesterol is synthesized which could self-assemble into nano-tubes with a double molecule-layer shell, and which showed a fluorescence quantum yield of >76%. One film composed of nano-tubes displayed an enhanced first positive circular dichroism (CD) effect and emitted strong positive CPL light. A suspension or solution of the TPE dicycle tetracholesterol in DCE had a first negative CD band and negative CPL emission. In contrast, TPE tetracholesterol without intramolecular cyclization self-assembled into very soft "noodle-like" aggregations and showed very weak CD signals and CPL emission. The TPE dicycle tetracholesterol had a large CPL dissymmetric factor (<= 3.0 x 10(-3)), which was 30 times larger than the TPE tetracholesterol without cycles. Due to the strong bisignate band in the CD spectrum of TPE dicycle tetracholesterol and the absence of a helical structure in aggregates, the CD and CPL signals of the TPE dicycle tetracholesterol could be ascribed to the prevailing single-handed propeller-like conformation of TPE units induced by chiral cholesterol groups.
语种	英语
WOS记录号	WOS:000475481600005
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/82724]
专题	中国科学院化学研究所
作者单位	Chinese Acad Sci, Inst Chem, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Yuan, Ying-Xue,Xiong, Jia-Bin,Luo, Jun,et al. The self-assembly and chiroptical properties of tetraphenylethylene dicycle tetracholesterol with an AIE effect[J]. JOURNAL OF MATERIALS CHEMISTRY C,2019,7(27):8236-8243.
APA	Yuan, Ying-Xue.,Xiong, Jia-Bin.,Luo, Jun.,Hu, Ming.,Jiang, Hejin.,...&Zheng, Yan-Song.(2019).The self-assembly and chiroptical properties of tetraphenylethylene dicycle tetracholesterol with an AIE effect.JOURNAL OF MATERIALS CHEMISTRY C,7(27),8236-8243.
MLA	Yuan, Ying-Xue,et al."The self-assembly and chiroptical properties of tetraphenylethylene dicycle tetracholesterol with an AIE effect".JOURNAL OF MATERIALS CHEMISTRY C 7.27(2019):8236-8243.