Cd(II) and Cu(II) complexes of polydentate Schiff base ligands: synthesis, characterization, properties and biological activity

Copper(II) complexes of coumarin-derived Schiff bases and their anti-Candida activity

“…Upon complexation, the phenolic m C-O stretching vibration shifted to lower frequency, suggesting coordination of this oxygen atom. Several new bands present in the region 400-600 cm À1 in the spectra of the complexes were assigned to m Cu-N and m Cu-O stretching vibrations [52][53][54][55].…”

“…3400 cm À1 was assigned to the m OH stretch. The breadth of this band can be explained as the effect of intramolecular hydrogen bonding between the imine nitrogen and the hydrogen from the ortho-hydroxyl group [52,53]. The UV-vis spectra of the Schiff bases contained hypochromic absorption bands in the ultraviolet region of the spectra corresponding to the p ?…”

“…430 nm, were assigned to forbidden n ? p * transitions associated with the azomethine group [30,52,53].…”

“…k = 340 nm were assigned to a ligand to metal change transfer (LMCT) transition, and the lower energy band in the region of ca. k = 420 nm were assigned to a metal to ligand change transfer (MLCT) transition [52]. A low intensity absorption band in the visible region of the spectra of concentrated solutions of 3b and 3c correspond to a d ?…”

Crystal structure of 2-((1-(1-adamantyl)ethyl)iminomethyl)phenol, C19H25NO

“…For many years, there has been considerable interest in the study of Schiff base compounds due to their biological activity [1,2]. Recently, we have already reported some organic complexes and metal-organic coordination complexes constructed by Schiff bases [3][4][5].…”