Insights into the new cobalt (II) monosubstituted keggin-type polyoxomolybdate: synthesis, characterizations, and application in the catalytic degradation of crystal violet dye

In this study, a new Co(II)-substituted Keggin-type polyoxomolybdate was synthesized at room temperature and characterized by FT-IR, powder X-ray diffraction (PXRD), UV-visible spectroscopy, TG-DTA thermal analysis, single crystal X-ray diffraction technique and cyclic voltammetry study. The crystal packing exhibits non-conventional C−H···O and C−H···S hydrogen bonds which lead to a three-dimensional supramolecular framework. The catalytic property of compound (1) was positivity tested in the degradation of crystal violet dye (CV) investigated.

Graphical abstract

A new organic-inorganic compound based on Keggin anions and Cobalt (II)ions, namely [Co(C₂H₆OS)₆]₂[HPMo₁₁O₃₉Co(C₂H₆OS)] .2(C₂H₆OS) ·2.5(H₂O) (1) was synthesized and characterized by single-crystal X-Ray diffraction, IR, thermal analyses and cyclic voltammetry. The catalytic ability of (1) for decolorization of Crystal violet dye from aqueous solutions has been investigated.