Smart polymer microgels for fabrication and stabilization of silver Zahoor Hussain Farooqi University of the Punjab Smart polymer hybrid microgels have become the subject of interest due to their potential use in catalysis. 1-3 We have synthesized various microgel systems with different morphologies by free radical precipitation polymerization in aqueous medium using N,N-methylenebisacrylamide as chemical crosslinker, ammonium per sulfate as initiator and sodium dodecyl sulfate as surfactant/emulsifier. Resulting microgel systems were used as nano-reactors for in-situ fabrication of silver nanoparticles using silver nitrate as precursor and sodium borohydride as reducing agent. The pure microgel and hybrid microgel systems were characterized using various techniques. Hybrid microgel systems were used as catalyst for reduction reactions in aqueous medium using sodium borohydride as reducing agent. Reaction monitoring was carried out using UV-Visible spectrophotometry under different reaction conditions. Kinetics of catalytic reactions under various reaction conditions was investigated for determination of different kinetics parameters including apparent rate constant, apparent half-life period, intrinsic rate constant, induction period and reaction completion time. Mechanism of catalysis of reduction reactions in the presence of hybrid polymer microgels was proposed in the light of kinetics data. References
1. R. Begum, Z. H. Farooqi, J. Xiao, E. Ahmed, A. Sharif and A. Irfan, J. Mol. Liq., 2021, 338 , 116780. 2. F. Tahir, R. Begum, W. Wu, Ahmad Irfan and Z. H. Farooqi, RSC Adv., 2021, 11 , 978-995. 3. M. Shahid, Z. H. Farooqi, R. Begum, W. Wu and A. rfan, Crit. Rev. Anal. Chem., 2020, 50 , 513-537.
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