Syntheses, Structures And Properties Of Keggin-type Polyoxometalates Based On [M₃O?OOCC₆H₅?₆?C₅H₅N?₃]⁺ Cation

In recent decades, inorganic-organic hybrid polyoxometalates have received considerable attention due to their widely applications in diverse areas such as catalysis, magnetic, optical and medicine chemistry. With solvothermal synthesis method, here we obtained seven compounds being constructed by [XM₁₂O₄₀]n- polyoxoanions and [M₃O?OOCC₆H₅?₆?C₅H₅N?₃]+ cation. Which were achieved from the reaction of Keggin-type Hm[XM₁₂O₄₀]·nH₂O?m = 3?4. X = P?Si?Ge. M = W?Mo? and pre-prepared [TM₃O?C₆H₅COO?₆?C₅H₅N?₃]ClO₄? TM = Fe?Cr? clusters. All compounds were characterized by single-crystal X-ray diffraction, IR spectroscopy, UV-vis spectroscopy, elemental analyses. Moreover, the thermal stability were also investigated by TGA-MS analyzer and variable temperature FTIR spectra method.