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Department of Applied Chemistry, College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400030, P.R. China
E-mail: jhlin@cqu.edu.cn
; Tel: +86-023-65102316
Dalton Trans., 2013,42, 1603-1611
DOI:
10.1039/C2DT31965A
Received
28 Aug 2012,
Accepted
18 Oct 2012
First published online
23 Oct 2012
Based on the redox-active L (N,N′-bis-(4-pyridyl)phthalamide) ligand, two porous MOFs formulated as Zn6(BPC)6(L)3·9DMF (H2BPC = 4,4′-biphenyldicarboxylic acid) (1) and Cd2(TDC)2(L)2·4H2O (H2TDC = 2,5-thiophenedicarboxylic acid) (2) were synthesized and structurally characterized by single-crystal X-ray diffractions. Complex 1 features a uninodal 5-connected 3-fold interpenetrated 3D framework with {46.64}-bnn hexagonal BN topology. Complex 2 displays a uninodal 6-connected 2-fold interpenetrated 3D framework with {412.63}-pcu topology. When complexes 1 and 2 are used as supercapacitor electrode materials, they can provide a large voltage window as high as 2.6 V in an aqueous electrolyte, and their specific capacitances are much more than the value for the bare carbon glassy electrode. It is observed that the more the current density, the less the specific capacitance for the two kinds of supercapacitor electrode materials. The two complexes show different thermal stabilities, UV absorption and photoluminescence properties.
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