Highly-connected, porous coordination polymers based on [M4(μ3-OH)2] (M = CoII and NiII) clusters: different networks, adsorption and magnetic properties

Qing Chen; Wei Xue; Jian-Bin Lin; Rui-Biao Lin; Ming-Hua Zeng; Xiao-Ming Chen

doi:10.1039/C2DT12022D

Highly-connected, porous coordination polymers based on [M₄(μ₃-OH)₂] (M = Co^II and Ni^II) clusters: different networks, adsorption and magnetic properties†

Qing Chen,^a Wei Xue,^a Jian-Bin Lin,^a Rui-Biao Lin,^a Ming-Hua Zeng*^b and Xiao-Ming Chen*^a

* Corresponding authors

^a MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, China
E-mail: cxm@mail.sysu.edu.cn

^b Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education of China), School of Chemistry and Chemical Engineering, Guangxi Normal University, Guilin 541004, P. R. China
E-mail: zmh@mailbox.gxnu.edu.cn

Abstract

Two new 3D coordination polymers based on tetranuclear clusters, {[Co₄(ina)₅(μ₃-OH)₂(H₂O)(EtOH)]-NO₃·2EtOH·4H₂O}_n (1) (Hina = isonicotinic acid) and {[Ni₄(ina)₅(μ₃-OH)₂(EtCOO)]·6EtOH·2H₂O}_n (2), were obtained by the solvothermal reactions from Hina and different metal salts. The [M₄(μ₃-OH)₂] cores act as 7- and 9-connected nodes and are extended through ina linkers to highly-connected frameworks with vmr net for 1 and bct-9-P2₁/c net for 2. Both the desolvated frameworks display effective gas sorption capacities of N₂ and H₂ with Langmuir surface areas of 546 and 917 m² g⁻¹ for 1 and 2, respectively. Magnetic studies show spin canting and spin-glass behaviours with T_g = 6.0 and 15.0 K for 1 and 2, respectively. The intra- and inter-tetramer coupling interactions and cooperative magnetic correlation greatly influence the bulk magnetic behaviours in this system.

This article is part of the themed collection: Coordination chemistry in the solid state

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Article information

DOI: https://doi.org/10.1039/C2DT12022D
Article type: Paper
Submitted: 25 Oct 2011
Accepted: 18 Jan 2012
First published: 15 Feb 2012

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Dalton Trans., 2012,41, 4199-4206

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Highly-connected, porous coordination polymers based on [M₄(μ₃-OH)₂] (M = Co^II and Ni^II) clusters: different networks, adsorption and magnetic properties

Q. Chen, W. Xue, J. Lin, R. Lin, M. Zeng and X. Chen, Dalton Trans., 2012, 41, 4199 DOI: 10.1039/C2DT12022D

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