Abstract
The design, preparation and characterization of a novel composite based on functionalization of halloysite nanoclay with Schiff base followed by immobilization of copper iodide as nanoparticles is revealed. This novel nano composite was fully characterized by utilization of FTIR, SEM/EDX, TGA, XRD and BET techniques. This Cu(I) NPs immobilized onto halloysite was successfully examined as a heterogeneous, thus easily recoverable and reusable catalyst in one of classist organic name reaction so-called “Click Reaction”. That comprised a three component reaction of phenylacetylene, α-haloketone or alkyl halide and sodium azide in aqueous media to furnish 1,2,3‐triazoles in short reaction time and high yields. Remarkably, the examination of the reusability of the catalyst confirmed that the catalyst could be reused at least six reaction runs without appreciable loss of its catalytic activity.
Highlights
The design, preparation and characterization of a novel composite based on functionalization of halloysite nanoclay with Schiff base followed by immobilization of copper iodide as nanoparticles is revealed
As a matter of fact these kind of chelates have been found the most applicable ones in coordination chemistry, which can be employed in the synthesis of the various agents as polymer stabilizer, and dyes and pigments, as well as catalytic s ystems[15,16]
The FTIR spectrum of the halloysite nanotubes (HNTs)-TSC-PC showed the characteristic bands of HNTs included, 1649, 539 and 3621–3696 cm−1 as well as two additional band at 1326 cm−1, which is representative of C=S stretching and the strong absorption peaks of the C=N band at 1627 cm−1 confirms the successful formation of Schiff base (Fig. 2c, TSC-PC)
Summary
The design, preparation and characterization of a novel composite based on functionalization of halloysite nanoclay with Schiff base followed by immobilization of copper iodide as nanoparticles is revealed. HNTs which are a dioctahedral 1:1 clay mineral found some in soils, those collected from wet tropical and subtropical areas These regions and weathered igneous and non-igneous rocks, are place in New Zealand, Mexico, Brazil USA, Australia and China. Several complexes of Schiff bases as catalytic agents, have been found readily accessible, highly effective and more important very stable in a wide range of organic transformations Due to their great stability, they are exceptionally useful the catalysts of choice, for the organic reactions, conducted at high temperature (> 100 °C), even under wet c onditions[20,21,22,23,24]
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