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A novel cobalt(II)-molybdenum(V) phosphate organic-inorganic hybrid polymer |
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| Authors: | Fa-Nian Shi,Penka I. Girginova,Joã o Rocha,Jacek Klinowski |
| Affiliation: | a Department of Chemistry, CICECO, University of Aveiro, 3810-193 Aveiro, Portugal b Department of Physics, CICECO, University of Aveiro, 3810-193 Aveiro, Portugal c Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK |
| Abstract: | A new organic-inorganic hybrid cobalt(II)-molybdenum(V) phosphate polymer incorporating piperazine (pip), (H2pip)3[Co3Mo12O24(OH)6(PO4)8(H1.5pip)4]·5(H2O), was prepared under hydrothermal conditions. As revealed by single-crystal X-ray diffraction studies, the material is modular, built from a secondary building block composed of two anionic hexameric polyoxomolybdophosphate [Mo6O12(OH)3(PO4)4]9− moieties, bridged by a central octahedral Co2+ centre. The sandwich-type {Co[Mo6O12(OH)3(PO4)4]2}16− dimers are connected via tetrahedral Co2+ metal centres, forming an infinite one-dimensional polymer. The compound constitutes the first example of a reduced sandwich-type cobalt-molybdenum phosphate in which the organic moiety (pip) is effectively coordinated to the inorganic backbone of the polymer, in this case via the tetrahedrally coordinated Co2+ centres. The magnetic behaviour of this material was investigated in the temperature range 4-298 K. |
| Keywords: | Hybrid material Molybdenum phosphate Polyoxometalates Magnetochemistry |
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