Volume 28, Issue 12 pp. 1787-1793
Research article

Synthesis of pyridoxine-based eagle-shaped asymmetric star polymers through seATRP

Paweł Chmielarz

Corresponding Author

Paweł Chmielarz

Faculty of Chemistry, Department of Physical Chemistry, Rzeszów University of Technology, Al. Powstańców Warszawy 6, 35-959 Rzeszów, Poland

Correspondence to: Paweł Chmielarz, Faculty of Chemistry, Department of Physical Chemistry, Rzeszów University of Technology, Al. Powstańców Warszawy 6, 35-959 Rzeszów, Poland.

E-mail: [email protected]

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First published: 19 April 2017
Citations: 19

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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