Polyoxomolybdates Functionalized with Aminomethylene Phosphonate

摘要

A new organic-inorganic hybrid Strandberg-type polyoxomolybdate derivative [(n-C4H9)4N]2[(NH2CH2PO3)2Mo5O_(15)] · (CH3NHCH3)2 · H2O (I) has been synthesized and structurally characterized by elemental analysis, IRspectrum, UV spectrum, TG analysis, cyclic voltammetry, and single-crystal X-ray diffraction. The hybrid polyoxoanion [(NH2CH2PO3)2Mo5O_(15)]~(2-) consists of a ring-shaped {Mo5O_(21)} cluster with two [NH2CH2PO3]~- groups incorporating into the opposite sides of the ring. The UV spectrum studied at different times reveals that I remains stable in CH3CN-H2O solvents (volume ratio =1:2) for one day, and the electrochemical measurement indicates that I can exist in a pH range of 4.12-4.72.