Metamagnetic behavior and moisture-absorption induced reversible network assembly of a cobalt-1,2,4-benzenetricarboxylate supramolecular network

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Title:	Metamagnetic behavior and moisture-absorption induced reversible network assembly of a cobalt-1,2,4-benzenetricarboxylate supramolecular network
Authors:	Chung, H.-T., Yang, C.-I., Yang, E.-C., Peng, C.-C., Tsai, H.-L., Liu, Y.-H.
Contributors:	Department of Chemistry, Tunghai University
Date:	2012
Issue Date:	2013-05-14T09:02:30Z (UTC)
Abstract:	A Co(ii) 1,2,4-benzenetricarboxylate supramolecular network, {Co[C 6H 3(CO 2) 2(CO 2H)](H 2O) 2·H 2O} n (FJU-4) was synthesized from an unsymmetrical ligand, namely 1,2,4-benzenetricarboxylic acid (H 3btc), under pH-controlled hydrothermal conditions. FJU-4 has a 2D layered structure with an interdigitated pendent-arm, composed of a carboxylate- and a water-bridged cobalt chain, which are united to generate a 3D supramolecular structure through interlayer hydrogen bonding and π-π interactions between the phenyl rings, carboxyl groups, and guest water molecules. The assembly of the FJU-4 network is a reversible process, as the result of changes in noncovalent interactions triggered by dehydration and the absorption of moisture. A magnetic analysis showed that FJU-4 exhibits metamagnetic behavior resulting from spin-canting magnetization while heat capacity measurements indicated that FJU-4 undergoes long range magnetic ordering at 2.6 K. ? 2012 The Royal Society of Chemistry.
Relation:	CrystEngComm 14 (4) , pp. 1317-1323
Appears in Collections:	[化學系所] 期刊論文

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