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Journal of Coordination Chemistry Volume 73, 2020 - Issue 17-19
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Original Articles

Synthesis and characterization of an octanuclear nickel(II) polyoxometalate cluster

Zongfei YangHenan Key Laboratory of Polyoxometalate Chemistry, Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan, People’s Republic of ChinaView further author information
,
Xindi YangHenan Key Laboratory of Polyoxometalate Chemistry, Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan, People’s Republic of ChinaView further author information
,
Linyu JinHenan Key Laboratory of Polyoxometalate Chemistry, Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan, People’s Republic of ChinaView further author information
,
Kaili DongHenan Key Laboratory of Polyoxometalate Chemistry, Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan, People’s Republic of ChinaView further author information
,
Pengtao MaHenan Key Laboratory of Polyoxometalate Chemistry, Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan, People’s Republic of ChinaView further author information
,
Jingyang NiuHenan Key Laboratory of Polyoxometalate Chemistry, Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan, People’s Republic of ChinaCorrespondence[email protected]
View further author information
&
Jingping WangHenan Key Laboratory of Polyoxometalate Chemistry, Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan, People’s Republic of ChinaView further author information
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Pages 2383-2390 | Received 28 Apr 2020, Accepted 02 Jul 2020, Published online: 28 Jul 2020
 
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Abstract

A high-nuclearity nickel-substituted polyoxotungstate, Na6K5.5H4.5 {[Ni8(OH)6(H2O)2](CO3)3(SiW9O34)2}·22H2O (1), has been obtained by the reaction of Na10[α-SiW9O34]·18H2O, Ni(NO3)2·6H2O and K2CO3 in aqueous solution and characterized by IR spectroscopy, single crystal X-ray diffraction, thermal gravimetric analysis and elemental analysis. Carbonate is not only used to adjust the pH of the solution, but also is a structure-stabilizing agent. The polyoxoanion {[Ni8(OH)6(H2O)2](CO3)3(SiW9O34)2}16- (1a) can be regarded as two {[Ni4(OH)3(H2O)](SiW9O34)} subunits connected by three carbonate groups, which represents the first polyanion containing an octanuclear nickel cluster based on trivacant Keggin-type polyoxotungstate {XW9} (X = heteroatom). The subunit {[Ni4(OH)3(H2O)](SiW9O34)} can be viewed as a tetranuclear nickel cluster linked to a trivacant Keggin-type polyoxotungstate {SiW9O34}. Furthermore, magnetic measurements show that 1 exhibits antiferromagnetic interactions.

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

We thank the National Natural Science Foundation of China (Grants 21771054, 21571050, 21573056 and 21771053) and the Natural Science Foundation of Henan Province (Grant 162300410015) for support.

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