Synthesis, Spectroscopic and Thermal Analysis and Investigation of Dyeing Properties of o‐Hydroxy Schiff Bases and Their Metal Complexes

Abstract

Two series of new Schiff base metal complexes (Cu(II), Ni(II), Co(II), Mn(II), Zn(II)) were synthesized and used to study their fastness and thermal properties. All of the dyes were applied on cotton, polyester and cellulose acetate fabrics as reactive dyes by using temperature and 1 : 20 Flotte ratio. Washing, rubbing and light fastness was investigated by ISO 105‐C06 A2S, TS EN ISO 105‐X12 and ISO 105‐B02 methods, respectively and obtained very well to excellent results. Structures of the metal complex dyes were elucidated by IR, UV‐Vis, 1H‐NMR, 13C‐NMR, mass spectroscopic techniques, magnetic susceptibility measurements, elemental analysis, and thermal analysis. Spectroscopic results indicate that all of the complexes adopt octahedral geometry. Also the results indicate that the complexes are formed by the binding of a metal ion with two Schiff bases by using two >C=N‐ groups, two hydroxyl groups and two aqua ligands. In the present study, for the first time, fabrics were dyed with Schiff bases and metal complexes, and then, their fastness analyses were carried out and were obtained fine results.

Experimental and theoretical quantum chemical studies of 2-(2-acetamidophenyl)-2-oxo-N-(pyridin-2-ylmethyl)acetamide and its copper(II) complex: molecular docking simulation of the designed coordinated ligand with insulin-like growth factor-1 receptor (IGF-1R)

“…6 ), showed the decomposition of the complex to occur in a three-step mechanism. It was mostly reported that the detached or non-coordinate water can be assigned in the TGA-temperature range from 30 °C to − 100 °C, while the coordinated water is mostly losing in between 100 °C and 150 °C [ 64 – 67 ]. It was observed that the first step between 40 and 252 °C is due to the decomposition of 3H 2 O (non-coordinated and coordinated) + NHCOCH 3 moiety, (found: 23.455%; calculated: 23.067%).…”

Stability, spectroscopic, electrochemistry and QTAIM analysis of Cu-Znn−1On clusters for glucose sensing application: A study on theoretical and experimental insights

“…O–H, C–H, C–O, Zn–O and Cu–O stretching peaks were detected in similar regions in all complexes, as seen in Table 4 . The IR spectrum of the Cu–Zn 2 O 3 -glucose complex ( 4 ) ( Figure 11 (b)) showed strong peaks at 2604 cm −1 , which are observed in the theoretical spectrum, are caused by hydrogen bond formation (C–O⋯H⋯O–Zn) (see Figure 9 ) and Fermi resonance [ 56 ] The presence of O–H bending signals, detected as medium peaks at 1232 cm −1 , 937 cm −1 and 875 cm −1 [ 61 ], respectively, in the Zn 3 O 3 -glucose complex, confirms the coordination of the Zn atom and glucose O atom. Due to the lack of coordination in the Cu–Zn 2 O 3 -glucose complex, the Cu–O stretching vibrational modes were detected at 702 cm −1 , 601 cm −1 454 cm −1 ( Figure 11 (b)), respectively, at higher frequencies than for the Cu–ZnO 2 -glucose complex [ 56 , 59 ].…”

Synthesis, Characterization and Breast Anti-cancer Activity of Iron(II), Cobalt(II), Nickel(II) and Copper(II) Complexes with a Hexadentate Schiff Base Ligand Derived from 2,5-Dihydroxy-1,4-benzoquinone with 5-Amino-2-methylphenol

“…Ni(II) complex has a μ eff value (2.97 B.M), which shows that it has a paramagnetic property due to the two unpaired electrons in d-orbitals and its shape is also octahedral [25][26]. For the Cu(II) complex its μ eff is 2.34 B.M also suggests the paramagnetic characteristics of this ion and agrees with the octahedral structure of the Cu(II) complex and the presence of one electron [8].…”