Coil-by-coil assembly of poly[acrylamide-co-3-(methacryl-amido)- phenylboronic acid] with polydiallyldimethyl-ammonium to give alizarin red S responsive films
Shariki, S., Cox, O.T.L., Tickell, D.A., James, T.D., Dale, S.E.C., Marken, F., Pereira Morais, M.P., Van Den Elsen, J.M.H. and Bending, S., 2012. Coil-by-coil assembly of poly[acrylamide-co-3-(methacryl-amido)- phenylboronic acid] with polydiallyldimethyl-ammonium to give alizarin red S responsive films. Journal of Materials Chemistry, 22 (36), pp. 18999-19006.
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An electrolyte-stable polymer composite sensor film based on 2.4% boronic acid substituted polyacrylamide (poly[acrylamide-co-3-(methacrylamido)- phenylboronic acid] or P(A-MPBA)) and polydiallyl-dimethyl-ammonium chloride (or PDDACl) is obtained in a coil-by-coil deposition procedure. Based on AFM evidence, the resulting coil aggregate deposits show ca. 5-10 nm diameter and the average film thickness increases with ca. 1 nm per deposition cycle consistent approximately with the solution coil diameter. In electrochemical experiments alizarin red S is employed as a boronic acid indicating redox probe with a Langmuirian binding constant of ca. K = 4 × 10 M and two distinct redox responses tentatively assigned here to two isomeric forms of the complex in oxidized and reduced state. Inter- and intra-coil electron transfer and electron hopping occurs during alizarin red S reduction and back-oxidation. Both smooth and mesoporous ITO substrates are employed.
|Creators||Shariki, S., Cox, O.T.L., Tickell, D.A., James, T.D., Dale, S.E.C., Marken, F., Pereira Morais, M.P., Van Den Elsen, J.M.H. and Bending, S.|
|Departments||Faculty of Science > Chemistry|
Faculty of Engineering & Design > Chemical Engineering
Faculty of Science > Biology & Biochemistry
Faculty of Science > Physics
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