Acid/Base- and Anion-Controllable Organogels Formed From a Urea-Based Molecular Switch

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Title:	Acid/Base- and Anion-Controllable Organogels Formed From a Urea-Based Molecular Switch
Authors:	Hsueh, Sheng-yao;Kuo, Chun-ting;Lu, Tsan-wen;Lai, Chien-Chen;Liu, Yi-hung;Hsu, Hsiu-fu;Peng, Shie-ming;Chen, Chun-hsien;Chiu, Sheng-hsien
Contributors:	淡江大學化學學系
Keywords:	host–guest chemistry;molecular recognition;molecular switches;organogels;rotaxanes
Date:	2010-11
Issue Date:	2011-09-03 17:55:39 (UTC+8)
Publisher:	Weinheim: Wiley - V C H Verlag GmbH & Co. KGaA
Abstract:	A switch in time: Gel–sol transitions of a urea-based [2]rotaxane gelator are controlled by the degree of solvent exposure of the hydrogen-bond-donating urea station and the orientation of the hydrogen-bond-accepting C[DOUBLE BOND]O groups of the interlocked ethylene glycol based macrocycle (N blue, O and macrocycle red, phenyl green). Both acid/base and anion-exchange control can be used to reversibly transition the rotaxane in 1-pentanol between solution and gel states.
Relation:	Angewandte Chemie International Edition 49(48), pp.9170-9173
DOI:	10.1002/anie.201004090
Appears in Collections:	[Graduate Institute & Department of Chemistry] Journal Article

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