Hydrothermal assembly of (3,6)-connected networks with classical mineral structures constructed from Anderson-type heteropolymolybdate and metal cations |
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Authors: | Bo Gao Lin-Hua Xie Miao Yu Chun-Dan Zhang Chun-Yan Sun Hai-Yan Cheng |
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Institution: | Department of Chemistry, Institute of Polyoxometalate Chemistry, Northeast Normal University, Changchun 130024, P.R. China |
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Abstract: | A series of 3D heteropolymolybdates, (NH4)2{M(H2O)3]2TeMo6O24]}·H2O (M=Mn(1), Co(2), Ni(3), Cu(4), and Zn(5)) and Ln(H2O)4]2TeMo6O24]·3H2O (Ln=La(6), Ce(7), and Nd(8)), has been isolated from hydrothermal reactions and characterized by elemental analyses, IR spectra, X-ray crystallography and magnetic properties. Single-crystal X-ray diffraction analysis reveals that compounds 1-8 possess unusual (3,6)-connected networks constructed from Anderson-type anions TeMo6O24]6− and transion metal or rare-earth metal cations. Compounds 1-5 are of highly symmetrical structures with pyrite-like topology in which TeMo6O24]6− anions act as 6-connected sites and transition metal cations act as 3-connected sites. Compounds 6-8 crystallize in symmetrical space groups lower than that of 1-5 exhibiting rutile-like topology with TeMo6O24]6− anions acting as 6-connected sites and rare-earth metal cations acting as 3-connected sites. The magnetic properties of 1-4 are also presented. |
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Keywords: | Polyoxometalates Molybdenum Tellurium Hydrothermal assembly |
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