Synthesis of Smart Polymers by Visible Light and Organic Photoredox Catalyzed Atom Transfer Radical Polymerization
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Date
2024
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Publisher
UMT.lahore
Abstract
In this current research work, we employed an innovative approach involving visible light
mediated organic photoredox catalyzed atom transfer radical polymerization (O-ATRP) for the
synthesis of smart or stimuli responsive polymers. Metal free poly(methyl methacrylate-graft hydroxypropyl cellulose) (PMMA-g-HPC) and poly(vinyl pyrrolidone-graft-hydroxypropyl
cellulose) (PVP-g-HPC) stimuli responsive polymers were successfully synthesized with
controlled molecular weight and narrow dispersity index (Đ) via O-ATRP. For this purpose,
novel organic compounds 1,2,3,5-tetrakis(carbazol-9-yl)-4,6-dicyanobenzene (4CzIPN) and
2,4,5,6-tetrakis(diphenylamino)isophthalonitrile (4DPIPN) were also synthesized in this
research work. These organic compounds 4CzIPN and 4DPIPN were employed as an organic
photoredox catalysts. These novel photocatalysts were used for the synthesis of PMMA-g-HPC
and PVP-g-HPC polymers.