The reaction of the [meso-tetra(p-chlorophenyl)porphyrinato]cadmium(II) complex ([Cd(TClPP)]) with an excess of 2-aminopyridine results in the formation of the corresponding axially ligated(2- aminopyridine)[meso-tetra(p-chlorophenyl)porphyrinato]cadmium(II)with the formula [Cd(TClPP)(2-NH₂Py)] (I). This five-coordinated metalloporphyrin was characterized by infrared, UV-visible, fluorescence,singlet oxygen, ¹H nuclear magnetic resonance and single crystal X-ray diffraction techniques. The in vitro antimicrobial activity of the free base porphyrin H₂TClPP porphyrin, the [Cd(TClPP)] starting material andcomplex (I) were screened against different species of bacteria. The assays showed an increase of antimicrobial potential due to the insertion of the cadmium metal into the H₂TClPP porphyrin and the axial coordination of 2-aminopyridine. Molecular docking approach indicated that [Cd(TClPP)(2-NH₂Py)] hashigher binding affinity with hydrogen-bonding interactions.

2-aminopyridine Cadmium(II) meso-chlorophenylporphyrin coordination compound abbreviated as [Cd(TClPP)(2-NH₂Py)] was synthesized and characterized. This compound shows interesting antibacterial properties. The molecular docking approach suggests that [Cd(TClPP)(2-NH₂Py)] has higher binding affinity with hydrogen bonding interactions.

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.

A new organic-inorganic compound based on Keggin anions and Cobalt (II)ions, namely [Co(C₂H₂OS)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.