Issue 10, 2011
From the journal:

CrystEngComm

Two 1-D multi-nickel substituted arsenotungstate aggregates†

Junwei Zhao,*a   Dongying Shi,a   Lijuan Chen,ab   Pengtao Ma,a   Jingping Wanga  and  Jingyang Niu*a  

* Corresponding authors

a Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan, P.R. China
E-mail: zhaojunwei@henu.edu.cn, jyniu@henu.edu.cn
Fax: +86 378 3886876

b Basic Experiment Teaching Center, Henan University, Kaifeng, Henan, P.R. China

Abstract

Two multi-nickel substituted arsenotungstate aggregates [enH2]2[Ni(H2O)4]2[Ni(en)2]2[Ni(en)]2{[(α-AsW6O26)Ni6(OH)2(H2O)3(en)(B-α-AsW9O34)]2[W4O16][Ni3(H2O)2(en)]2}·16H2O (1) and [Ni(H2O)(en)2]2[Ni(H2O)3(en)][Ni(H2O)(en)]{[(α-AsW6O26)Ni6(OH)2(en)2.5(B-α-AsW9O34)]2H4[W4O16][Ni4(H2O)2(en)2]2}·13H2O (2) (en = ethylenediamine) have been hydrothermally synthesized and structurally characterized by elemental analyses, IR spectra, UV spectra and single-crystal X-ray diffraction. 1 is a 1D chain architecture built by eighteen NiII substituted {[(α-AsW6O26)Ni6(OH)2(H2O)3(en)(B-α-AsW9O34)]2[W4O16][Ni3(H2O)2(en)]2}16− units via two [Ni(H2O)4]2+ and two [Ni(en)2]2+ bridges. 2 also displays a 1D chain motif constructed from twenty NiII substituted {[(α-AsW6O26)Ni6(OH)2(en)2.5(B-α-AsW9O34)]2H4[W4O16][Ni4(H2O)2(en)2]2}8− units via single en bridges. Notably, 1 and 2 not only represent rare eighteen/twenty NiII substituted arsenotungstates, but also display an unusual construction motif simultaneously containing the trivacant Keggin [B-α-AsW9O34]9−, hexavacant Keggin [α-AsW6O26]11− and tetrameric [W4O16]8− fragments. Magnetic measurements demonstrate that 1 and 2 indicate the ferromagnetic couplings within NiII centers.

Graphical abstract: Two 1-D multi-nickel substituted arsenotungstate aggregates

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Article information

DOI
https://doi.org/10.1039/C0CE00983K
Article type
Paper
Submitted
27 Dec 2010
Accepted
17 Feb 2011
First published
11 Mar 2011

CrystEngComm, 2011,13, 3462-3469

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Two 1-D multi-nickel substituted arsenotungstate aggregates

J. Zhao, D. Shi, L. Chen, P. Ma, J. Wang and J. Niu, CrystEngComm, 2011, 13, 3462 DOI: 10.1039/C0CE00983K

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