Abstract
The vitamin B6‐based macroinitiator was prepared for the first time by the transesterification reaction of pyridoxine with 2‐bromoisobutyryl bromide. A pyridoxine‐based star‐shaped block copolymer with a hydrophilic pyridoxine core and a dual hydrophilic poly(2‐(dimethylamino)ethyl methacrylate)‐block‐poly(N‐isopropylacrylamide) arms was synthesized for the first time via a simplified electrochemically mediated atom transfer radical polymerization, utilizing only 20 ppm of catalyst complex. The rate of the polymerizations was controlled by applying appropriate potential/current values during electrolysis to prevent the possibility of intermolecular coupling of the polymer stars. The asymmetric star polymers showed narrow molecular weight distribution (Đ = 1.09–1.13). 1H NMR spectral results confirm the formation of star‐like block (co)polymers. These new vitamin B6‐based eagle‐shaped star (co)polymers may find biomedical and biosensor applications as pH‐sensitive and thermo‐sensitive drug delivery systems. Copyright © 2017 John Wiley & Sons, Ltd.
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