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Issue 15, 2017
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Versatile oligomers and polymers from flavonoids – a new approach to synthesis

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Abstract

Catechin, a flavanol, and quercetin, a flavonol, are two flavonoids that have demonstrated a number of potential health effects, including antioxidant, anti-inflammatory, anti-cancer, antihypertensive and antimicrobial effects. In this article, we describe a new facile procedure for preparing oligomers and polymers from catechin and quercetin, utilising only solvent and hydrochloric acid, which can be tuned to yield water soluble catechin oligomers (polycat) up to 3300 g mol−1, water soluble quercetin oligomers (polyqcn) of 3100 g mol−1 and higher molecular weight catechin polymers up to 15 000 g mol−1. The polymers were characterised by size exclusion chromatography (SEC), UV-Vis spectroscopy and 1H, 1H–13C HSQC and 1H–13C HMBC NMR spectroscopy. Evidence is presented for the polymerisation to occur through a step-growth mechanism. All polymers exhibited considerable free-radical scavenging capacity, indicating their potential for various therapeutic applications ranging from drug delivery for the lower molecular weight water soluble oligomers to tissue engineering, anti-oxidant coatings and eco-friendly material engineering applications for the higher molecular weight water insoluble polymers.

Graphical abstract: Versatile oligomers and polymers from flavonoids – a new approach to synthesis

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Supplementary files

Article information


Submitted
27 Feb 2017
Accepted
14 Mar 2017
First published
27 Mar 2017

Polym. Chem., 2017,8, 2317-2326
Article type
Paper

Versatile oligomers and polymers from flavonoids – a new approach to synthesis

S. Oliver, J. M. Hook and C. Boyer, Polym. Chem., 2017, 8, 2317
DOI: 10.1039/C7PY00325K

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