Issue 5, 2009
From the journal:

CrystEngComm

Microwave-assisted synthesis, crystal structure and properties of a disc-like heptanuclear Co(II) cluster and a heterometallic cubanic Co(II) cluster†

Shu-Hua Zhang,ab   You Song,a   Hong Liang*ab  and  Ming-Hua Zengb  

* Corresponding authors

a State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing, People's Republic of China
E-mail: hongliangby1@yahoo.com.cn

b Department of Chemistry and Chemical Engineering, Guangxi Normal University, Guilin, People's Republic of China

Abstract

The reaction of Co(ClO4)2·6H2O with a disodium 2-[(2-hydroxy-3-methoxy-enzylidene)-amino]-ethanesulfonic acid (Na2L) in a mixture solution (methanol : acetonitrile = 1 : 1 (v/v)) or an acetonitrile solution under microwave and controlled pressure/temperature, or solvothermal conditions leads to the formation of two completely different CoII complexes: heptanuclear cluster [Co7(immp)6(CH3O)6]·2ClO4 (1) (immp is 2-iminomethyl-6-methoxy-phenolic anion) and tetra-heteronuclear cubane cluster [NaCo3(L)3(CH3CN)3(OH)]2·CH3CN (2). The microwave-assisted reactions can improve the reaction rate and yield compared to simple solvothermal synthesis. The magnetic investigation shows that complexes 1 and 2 exhibit a ferromagnetic coupling between the CoII ions. AC susceptibilities of the two complexes reveal no frequency-dependent out-of-phase signals and the corresponding magnetic properties were discussed.

Graphical abstract: Microwave-assisted synthesis, crystal structure and properties of a disc-like heptanuclear Co(II) cluster and a heterometallic cubanic Co(II) cluster

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Article information

DOI
https://doi.org/10.1039/B815675A
Article type
Paper
Submitted
08 Sep 2008
Accepted
17 Dec 2008
First published
29 Jan 2009

CrystEngComm, 2009,11, 865-872

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Microwave-assisted synthesis, crystal structure and properties of a disc-like heptanuclear Co(II) cluster and a heterometallic cubanic Co(II) cluster

S. Zhang, Y. Song, H. Liang and M. Zeng, CrystEngComm, 2009, 11, 865 DOI: 10.1039/B815675A

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