Self-assembly of reduced molybdophosphate-based supramolecular architectures and the study of their magnetic properties
Tóm tắt
Reduced molybdophosphate-based supramolecular compounds, such as (4,4′-H2bipy)[Co(H2O)2]2[Co(H2PO4)2(HPO4)4(PO4)2(MoO2)12(OH)6] · 17H2O (1), [Co(2,2′-bipy)2(H2O)]4[Co(H2O)2][Co(HPO4)6(PO4)2(MoO2)12(OH)6] · 2H2O (2), and [Co(2,2′-bipy)2(H2O)]4[Co(H2PO4)(H2O)2]2[Co(HPO4)6(PO4)2(MoO2)12(OH)6] · 8H2O (3) (4,4′-bipy=4,4′-bipyridine, 2,2′-bipy=2,2′-bipyridine), have been synthesized under hydrothermal conditions and characterized. Compound 1 exhibits a three-dimensional supramolecular twofold interpenetrating architecture built up of one-dimensional [P4Mo6]-based infinite covalent chains and free 4,4′-bipy molecules. Compound 2 also shows a three-dimensional supramolecular network constructed from one-dimensional covalent [P4Mo6]-based chains. Unlike compounds 1 and 2, compound 3 exhibits an interesting three-dimensional ‘honeycomb-like’ supramolecular network constructed by the stacking of [Co(2,2′-bipy)2(H2O)] units with one-dimensional channels, in which the [P4Mo6]-based polyoxometalate chains are located. The magnetic properties of compounds 2 and 3 are reported.
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