Novel biological active nanostructure cadmium coordination compounds: Thermal analyses data and usage as new precursors for preparation of cadmium oxide nanoparticles

Abstract

ABSTRACTA new long-chain bidentate Schiff base ligand entitled of N1,N5-bis((E)-3-(4-(dimethylamino)phenyl) allylidene)-2-methylpentane-1,5-diamine(L) was synthesized. Then four novel cadmium coordination compounds of this ligand were prepared. Schiff base ligand and its complexes were characterized by FT-IR, 1H, 13C NMR, UV–Vis spectra and molar conductance measurements.Based on spectral data, the general formula of CdLX2 (X = Cl−, Br−, I−, and SCN−) was proposed for the cadmium complexes. The cadmium compounds in nanostructure size were also prepared by sonochemical method. The nanostructure compounds were characterized by X-ray diffraction (XRD) and scanning electron microscopy. The particle sizes were evaluated to be 28.04, 22.60, 11.30, and 31.85 nm for cadmium chloride, bromide, iodide, and thiocyanate complexes, respectively. Moreover, cadmium oxide nanoparticles with average size of about 26 nm were prepared and were characterized by XRD and transmission electron microscopy. Furthermore, the antimicrobial activity of the ligand and its cadmium complexes against four Gram-positive and Gram-negative bacteria and also two fungi was assessed. Also, electrophoresis method revealed that all compounds have DNA cleavage potential. Finally, thermal behaviors of all compounds were studied by TG/DTG/DTA analyses data.