Supra-dendron Gelator Based on Azobenzene-Cyclodextrin Host-Guest Interactions: Photoswitched Optical and Chiroptical Reversibility

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	Supra-dendron Gelator Based on Azobenzene-Cyclodextrin Host-Guest Interactions: Photoswitched Optical and Chiroptical Reversibility
	Xie, Fan 1; Ouyang, Guanghui 1; Qin, Long 1; Liu, Minghua 1,2
刊名	CHEMISTRY-A EUROPEAN JOURNAL
	2016-12-12
卷号	22 期号:50 页码:18208-18214
关键词	Chiral Twist Chiroptical Switching Gels Photoresponsiveness Supramolecular Chemistry
英文摘要	A novel amphiphilic dendron (AZOC(8)GAc) with three l-glutamic acid units and an azobenzene moiety covalently linked by an alkyl spacer has been designed. The compound formed hydrogels with water at very low concentration and self-assembled into chiral-twist structures. The gel showed a reversible macroscopic volume phase transition in response to pH variations and photo-irradiation. During the photo-triggered changes, although the gel showed complete reversibility in its optical absorptions, only an incomplete chiroptical property change was achieved. On the other hand, the dendron could form a 1: 1 inclusion complex through a host-guest interaction with alpha-cyclodextrin (alpha-CD), designated as supra-dendron gelator AZOC(8)GAc/alpha-CD. The supra-dendron showed similar gelation behavior to that of AZOC(8)GAc, but with enhanced photoisomerization-transition efficiency and chiroptical switching capacity, which was completely reversible in terms of both optical and chiroptical performances. The self-assembly of the supra-dendron is a hierarchical or multi-supramolecular self-assembling process. This work has clearly illustrated that the hierarchical and multi-supramolecular self-assembling system endows the supramolecular nanostructures or materials with superior reversible optical and chiroptical switching.
语种	英语
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/37977]
专题	化学研究所_胶体、界面与化学热力学实验室
作者单位	1.Chinese Acad Sci, Inst Chem, CAS Key Lab Colloid Interface & Chem Thermodynam, Beijing 100190, Peoples R China 2.Collaborat Innovat Ctr Chem Sci & Engn, Tianjin 300072, Peoples R China
推荐引用方式 GB/T 7714	Xie, Fan,Ouyang, Guanghui,Qin, Long,et al. Supra-dendron Gelator Based on Azobenzene-Cyclodextrin Host-Guest Interactions: Photoswitched Optical and Chiroptical Reversibility[J]. CHEMISTRY-A EUROPEAN JOURNAL,2016,22(50):18208-18214.
APA	Xie, Fan,Ouyang, Guanghui,Qin, Long,&Liu, Minghua.(2016).Supra-dendron Gelator Based on Azobenzene-Cyclodextrin Host-Guest Interactions: Photoswitched Optical and Chiroptical Reversibility.CHEMISTRY-A EUROPEAN JOURNAL,22(50),18208-18214.
MLA	Xie, Fan,et al."Supra-dendron Gelator Based on Azobenzene-Cyclodextrin Host-Guest Interactions: Photoswitched Optical and Chiroptical Reversibility".CHEMISTRY-A EUROPEAN JOURNAL 22.50(2016):18208-18214.