Aerobic synthesis of biocompatible copper nanoparticles: promising antibacterial agent and catalyst for nitroaromatic reduction and C–N cross coupling reaction

Abstract

Herein, we report the synthesis of copper nanoparticles at ambient conditions using biopolymer, pectin, as a protecting agent and hydrazine as a reducing agent.

An efficient d-glucosamine-based copper catalyst for C–X couplings and its application in the synthesis of nilotinib intermediate

“…Melting points were determined on an X-5 Data microscopic melting point apparatus. 1 H NMR and 13 C NMR spectra were recorded on a Bruker Avance 400 spectrometer at ambient temperature with CDCl 3 or DMSO-d 6 as solvent unless otherwise noted and tetramethylsilane (TMS) as the internal standard. 1 H NMR data were reported as follows: chemical shi (d ppm), multiplicity (s ¼ singlet, d ¼ doublet, t ¼ triplet, q ¼ quartet, dd ¼ doublet of doublets, m ¼ multiplet and br ¼ broad), coupling constant (J values, Hz).…”

PVP-crosslinked electrospun membranes with embedded Pd and Cu2O nanoparticles as effective heterogeneous catalytic supports

“…The broad absorption tail appearing between 300-800 nm is typical for Pd MNP colloidal systems, 48,49 whereas in the case of the Cu-containing solutions the characteristic surface plasmon resonance (SPR) signal appears at around 580 nm, indicating the existence of Cu MNP in solution. 50 When the freshly prepared PVP-Cu colloidal solution was exposed to air, the colour of the solution gradually changed from red to light blue (Fig. 1), indicating the oxidation of the Cu NP to Cu 2 O NP.…”

Synthesis of fibrinolytic active silver nanoparticle using wheat bran xylan as a reducing and stabilizing agent

“…Biopolymers such as cellulose, chitosan, starch, lignin and xylan are effectively utilized in the synthesis of nanoparticles (Luo, Pan, Ling, Wang, & Sun, 2014;Luo, Shen, Luo, Wang, & Sun, 2015;Shen, Luo, Wang, Wang, & Sun, 2014). Our team has recently reported number of biomolecules, for example, pectin (Venkatakrishnan, Veerappan, Elamparuthi, & Veerappan, 2014), levan (Ahmed, Kalla, Uppuluri, & Anbazhagan, 2014), ␤-glycoside (Ahmed, Subramaniam, et al, 2014), modified lipids (Anbazhagan, Ahmed, & Janani, 2014) and casein (Chakrapaniet al, 2014), for the preparation of coinage metal nanoparticles. In the present work, for the first time, we isolated xylan biopolymer from the waste biomass, wheat bran (WB) and demonstrated its ability to synthesis stable nanoparticles.…”