Two novel windmill-like tetrasupporting heteropolyoxometalates: [Mo VI7Mo VV IV8O 40(PO 4)][M(phen) 2(OH)] 2[M(phen) 2(OEt)] 2 (M=Co, Ni)
Abstract
Two interesting neutral tetrasupporting heteropolyoxometalates: [Mo VI7Mo VV IV8O 40(PO 4)][M(phen) 2(OH)] 2[M(phen) 2(OEt)] 2· xH 2O (phen=1,10-phenanthroline, EtOH=ethanol, M=Co, x=7, 1; M=Ni, x=6, 2) were hydrothermally prepared and structurally characterized. The mixed molybdenum-vanadium polyoxoanion [Mo VI7Mo VV IV8O 40(PO 4)] 4- exist in both two complexes, which acts as a bridge to covalently link two pairs of transition metal complex fragments, generating neutral windmill-like trimetallic nanocluster polyoxometalates. Variable-temperature magnetic susceptibility measurements of complexes 1 and 2 reveal that antiferromagnetic exchange interaction exists in this type of trimetallic tetrasupporting heteropolyoxometalates.
- Publication:
-
Solid State Sciences
- Pub Date:
- July 2004
- DOI:
- 10.1016/j.solidstatesciences.2004.04.003
- Bibcode:
- 2004SSSci...6..689L
