New Vanadium Phosphonate Clusters and Coordination Polymers

The solvothermal synthesis of vanadyl phosphonates has been studied under different conditions. Starting from dichlorovanadate, M[(VO2Cl2)-O-V] (M = PPh4, MePPh3), or decavanadate and phosphonic acids, RPO3H2 (R = Me, tBu, Ph), the formation of oxovanadium clusters under the directing influence of templates as well as of different solvents has been investigated. It is also shown that the cation M influences the formed oxovanadium structures as well as the rests in the phosphonic acids because of their different steric behaviour.