Abstract
In this study, synthesis of insoluble polymeric ligand (L) and its transition metal complexes [Cu(L)Cl2]·2H2O (1), [Co(L)Cl2(H2O)2] (2) and [Ni(L)Cl2(H2O)2] (3), having the azomethine groups, were synthesized by the condensation reactions of the diamines and dialdehydes. The structural properties were characterized by the analytical and spectroscopic methods using by elemental analysis, Fourier Transform Infrared, Thermo Gravimetric Analysis, Powder X-ray Diffraction, magnetic susceptibility and Inductively Coupled Plasma. The solubilities of the synthesized polymeric materials were also investigated and found as insoluble some organic and inorganic solvents. Additionally, their catalytic performance was carried out for the esterification reaction of acetic acid and butyl acetate. The highest conversion rate is 75.75% by using catalyst 1. The esterification of butanol gave butyl acetate with 100% selectivity.
Highlights
Poly(azomethine)s, known as polyimines or Schiff base polymers [1] are obtained by derivating from different diamines and dialdehydes [2]
We present synthesis and characterization of an insoluble polymeric ligand (L) and its metal complexes [Cu(L)Cl2]·2H2O (1), [Co(L)Cl2(H2O)(CH3OH)] (2) and [Ni(L)Cl2(H2O)2] (3)
The synthesized compounds were characterized by elemental analysis, Fourier Transform Infrared (FT-IR), Thermo Gravimetric Analysis (TGA), Inductively Coupled Plasma (ICP), Powder X-ray Diffraction (PXRD) analysis and magnetic susceptibility measurements
Summary
Poly(azomethine)s, known as polyimines or Schiff base polymers [1] are obtained by derivating from different diamines and dialdehydes [2]. Polyazomethine polymers have attracted great interest due to their different properties such as conjugated backbone and good thermal stability [4], imine sites [5], ability to form metal chelates [6] and mechanical strength [7]. N-butyl acetate is an important compound in the chemical industry (Scheme 1). The synthesized compounds were characterized by elemental analysis, Fourier Transform Infrared (FT-IR), Thermo Gravimetric Analysis (TGA), Inductively Coupled Plasma (ICP), Powder X-ray Diffraction (PXRD) analysis and magnetic susceptibility measurements. Their catalytic activities were investigated on the esterification reaction
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