A New 1D Polyoxovanadate [Cu(en)2V10O28][Cu(en)2(H2O)]2 2H3BO3 2H2O Containing the Rarely Non-condensed Boric acid

Abstract

A new 1D polyoxovanadate containing boric acid [Cu(en)2V10O28][Cu(en)2(H2O)]2 2H3BO3 2H2O (1, en=ethylenediamine) has been hydrothermally synthesized and structurally characterized. Compound 1 consists of a polyoxovanadate chain [Cu(en)2V10O4- 28 ]n based on the linkage of decavanadate clusters and [Cu(en)2]2+ groups, complex cations [Cu(en)2(H2O)]2+, free H3BO3 and H2O molecules. The polyoxovanadates and boric acid can undergo polycondensation into various B-O-V clusters under hydrothermal conditions, but 1 is the only example of the non-condensation of polyoxovanadate and boric acid. The IR spectrum and the thermal behavior of 1 were also studied