cu(i) nanoparticles immobilized onto poly (vinylpyridine-n-n-methylenebisacrylamide-acrylicacid) as a new, efficient and recyclable catalyst for the regioselective synthesis of 1, 2, 3-triazoles via click reaction in water

Poly (vinylpyridine-n-n-methylenebisacrylamide-acrylicacid) (2-vp-mbam-aa) was prepared from the reaction of tio2-methacryloxypropyltrimethoxysilane (tio2-maptms) with 2-vinylpyridine, methylenbisacrylamide (mbam) and tert-butyl acrylate (t-bua). subsequently (2-vp-mbam-aa) was reacted with cui to give the cu(i) nps supported onto the above polymer. these immobilized nano-particles were characterized by scanning electron microscopy (sem), energy dispersive x-ray spectroscopy (edx), ft-ir and inductively coupled plasma optical emission spectrometry (icp-oes). this well characterized composite was examined as effective and reusable heterogeneous catalyst in water for the regioselective synthesis of 1, 4-disubstituted 1, 2, 3-triazoles in excellent yields. the catalyst can be recovered by simple filtration and reused for at least five runs without losing its efficiency.