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Thermosensitive and redox-active polymers: Preparation and properties of poly(N-ethylacrylamide-co-vinylferrocene) and poly(N,N-diethylacrylamide-co-vinylferrocene)

✍ Scribed by Noriyuki Kuramoto; Yuichi Shishido; Katsutoshi Nagai

Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
143 KB
Volume
35
Category
Article
ISSN
0887-624X

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✦ Synopsis

Thermosensitive and redox-active polymers were prepared by copolymerization of N-ethyl-or N,N-diethylacrylamides with vinylferrocene (VFc). LCST (lower critical solution temperature) of the aqueous copolymer solution was decreased by increasing the ferrocene content in the copolymer. The oxidation of ferrocene led to a significant increase in LCST due to the transition from hydrophobic to hydrophilic character of the ferrocene moiety in the copolymer. The ferrocene content in the copolymer increases with increasing differences between the LCST's of the oxidation and reduction states. The transition could be made reversible by redox reaction using L- ascorbic acid as an oxidant and cerium sulfate as a reductant.

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