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Journal of Coordination Chemistry Volume 64, 2011 - Issue 14
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Original Articles

Exploratory syntheses and structural characterizations of three organic–inorganic hybrid polyoxomolybdate frameworks linked by M(II)-Ln units (M = Ni, Co, Zn; L = 2,2′-biimidazole)

Li-Ming Fan Advanced Material Institute of Research, Department of Chemistry, Qilu Normal University, Jinan 250013, China; College of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059, China
,
Da-Cheng Li College of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059, China
,
Pei-Hai Wei Advanced Material Institute of Research, Department of Chemistry, Qilu Normal University, Jinan 250013, China
,
Guang-Zeng Liu Advanced Material Institute of Research, Department of Chemistry, Qilu Normal University, Jinan 250013, China
,
Xiu-Tang Zhang Advanced Material Institute of Research, Department of Chemistry, Qilu Normal University, Jinan 250013, ChinaCorrespondence[email protected]
&
Jian-Min Dou College of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059, ChinaCorrespondence[email protected]
Pages 2531-2544 | Received 07 Apr 2011, Accepted 06 Jun 2011, Published online: 18 Jul 2011
 
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Abstract

Three new polyoxomolybdate compounds, {[Ni(H2biim)2(H2O)](Mo3O10)} n (1), [Co(H2biim)2(Hbiim)]2(H2Mo8O26)](H2O)4 (2), and {[Zn(H2biim)2(H2O)][Mo8O28(MoO2(H2biim)2)2](H4biim) (3) (H2biim, 2,2′-biimidazole), were designed and synthesized under hydrothermal conditions. X-ray diffraction analysis reveals that 1 is a snake-shaped chain consisting of asymmetric blocks of {Mo3O10}, in which the ratio of the octahedra {MoO6} and square pyramids {MoO5} is 1 : 2. Compounds 2 and 3 exhibit different structures, although similar synthetic environments (including pH, temperature, and reaction time) were employed. In 2, the cluster of H2Mo8 is decorated by two fragments of Co(H2biim)2(Hbiim)+ via the organic bridge of Hbiim−. Compound 3 consists of one γ-Mo8 , capped by two fragments of {MoO2(H2biim)2)2}2+ via terminal oxygens.

Acknowledgments

Financial support from the Natural Science Foundation of Shandong Province (no. BR2010BQ023), Shandong Provincial Education Department (no. J09LB55), and Qilu Normal University is gratefully acknowledged.

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