Synthesis, Spectral and Thermal Characterization of Cu(II) Complexes Containing Schiff Base Ligands and Their Antibacterial Activity Study

Abstract

Four complexes of Cu(II) ions containing Schiff base ligands, L 1 (C 20 H 14 O 4 N 4) [N,N`-Bis-(2-nitro-benzylidene)benzene-1,2-diamine] derived from condensation reaction of o-phenylenediamine and 2-nitrobenzaldehyde, L 2 (C 8 H 8 N 3 SCl)[2-(2-chlorobenzylidene) hydrazinecarbothioamide] derived from condensation reaction of thiosemicarbazide and ochlorobenzaldehyde and L 3 (C 9 H 11 N 3 OS) [2-(4-methoxybenzylidene)-hydrazinecarbothioamide, derived from the condensation reaction of anisaldehyde and thiosemicarbazide respectively. The synthesized ligands and their metal complexes were isolated in solid state from the reaction medium and characterized by molar conductivity measurement, magnetic susceptibility, infrared, electronic spectral, thermal analysis and some physical measurements. The overall reactions were monitored by TLC analysis.

BODIPY-Pyridylhydrazone Probe for Fluorescence Turn-On Detection of Fe3+ and Its Bioimaging Application

“…For the BODIPY-PH spectrum, the characteristic peaks at 3181, 2978, 2926, 1597, and 1584 cm −1 were assigned to N-H, C methyl -H, C methyl -H, C=N, and C=N stretching vibrations, respectively. It was observed that the wavenumbers of the N-H and C=N peaks were found at the lower frequencies than those values reported in the literature [55,56], due to the larger conjugation length. After complex formation, the broad and intense O-H peak at 3231 cm −1 regarding the H 2 O ligands that coordinated to the Fe 3+ was detected.…”

Aminophosphonate CuO nanocomposites for uranium(VI) removal: Sorption performance and mechanistic study

“…The main bands assigned to N-based compounds (amine groups, both primary and secondary) are identified within the range 3460-3200 cm − 1 (stretching) [59,60]; 1610-1600 cm − 1 (bending) [19]. The presence of S-based moiety (i.e., C=S) is authenticated by the band observed at 1335-1325 cm − 1 [61]. Numerous bands attest to the presence of phosphonate groups: stretching at 1260-1250 cm − 1 (-P=O) [10], stretching at 1116-1079 cm − 1 , 940-931 cm − 1 and 546-529 cm − 1 (P-O-C) [32,62].…”

Nd(III) sorption using aminophosphonate-based sorbents – Sorption properties and application to the treatment of REE concentrate

“…--Additionally, the broad peak located at 1583-1519 cm − 1 (specified to aromatic C --C bonds) and adsorption band detected at 1334-1315 cm − 1 associated with the stretching vibratio of C --S bonds [68], and the broad band located at 1583-1519 cm − 1 (assigned to C --C bond, in aromatic rings) demonstrate the effective synthesis of the sorbents through the one pot reaction of thiocarbazide, trimethylphosphite, and p-phthalaldehyde. Hence, the FTIR spectra of Bis-AP and Mono-AP (Fig.…”