Synthesis, crystal structure and two-dimensional infrared correlation spectroscopy of a layer-like transition metal (TM)-oxalate templated polyoxovanadium borate |
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| Authors: | Yanning Cao Changcang Huang Yiping Chen Fengli Zhang |
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| Institution: | a Department of Chemistry, Fuzhou University, Fuzhou, Fujian 350002, PR China
b State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, The Chinese Academy of Sciences, Fuzhou, Fujian 350002, PR China |
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| Abstract: | A novel polyoxometalate (POM) Na2(H2en)2{(VO)10B14O30(OH)2]2}{Mn4(C2O4) B2O4(OH)2]2}Mn(H2O)2·(H3O)12(H2O)191 (en=ethylenediamine), which is a layer-like transition metal (TM) oxalate templated polyoxovanadium borate, has been synthesized under hydrothermal conditions and characterized by EPR, elemental analysis, thermal analysis, single crystal X-ray diffraction and 2D IR correlation spectroscopy studies, respectively. This compound crystallized in the triclinic space group  with  ,  ,  , α=64.48(1)°, β=64.68(1)°, γ=63.93(1)°,  and Z=2. The cluster anion with an open central cavity has a central band of ten edge-sharing VO5 square pyramids, which is capped top and bottom by two crown-like polyborate ligands of formula B14O30(OH)2]20−. There is a fragment of {Mn4(C2O4)B2O4(OH)2]2}2− fixed in the central cavity as a guest part. The cluster units are connected to form a two-dimensional (2D) framework by octahedral Mn(II) and Na+ sites. In addition, we first introduce the generalized 2D correlation spectroscopy to explore the POMs and obtain the dynamic information about structural changes of POMs. |
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| Keywords: | Polyoxometalates Vanadium Borate 2D IR correlation spectroscopy Clusters |
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