Target synthesis of a new bicapped keggin polyoxometalate derivative: [Co(phen)3]2[SiMoVI 8MoV 4VIV 2O42]$H2O

A new bicapped Keggin polyoxometalate derivative, [Co(phen)3]2[SiMoVI 8MoV 4VIV 2O42]$H2O (phenZ1,100-phenanthroline), has been synthesized under hydrothermal conditions by using H4SiMo12O40 as starting materials. Two kinds of crystallographic unique supramolecular chains coexisted in the crystal structure. Single crystal X-ray analysis revealed that compound 1 crystallized in the triclinic system, space group P 1, aZ11.911(4) A ° , bZ13.726(0) A ° , cZ14.892(6) A ° , aZ105.492(2)8, bZ91.358(4)8, gZ97.432(4)8, VZ2322.37(8) A° 3, ZZ1. Other characterizations by elemental analysis, IR, XPS, ESR and TGA analysis were also described in this paper. q 2004 Elsevier B.V. All rights reserved