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Sensors 2018, 18(1), 317; https://doi.org/10.3390/s18010317

Voltammetric Response of Alizarin Red S-Confined Film-Coated Electrodes to Diol and Polyol Compounds: Use of Phenylboronic Acid-Modified Poly(ethyleneimine) as Film Component

1
Faculty of Pharmacy, Takasaki University of Health and Welfare, 37-1 Nakaorui, Takasaki 370-0033, Japan
2
Graduate School of Pharmaceutical Sciences, Tohoku University, Aramaki, Aoba-ku, Sendai 980-8578, Japan
*
Author to whom correspondence should be addressed.
Received: 5 January 2018 / Revised: 19 January 2018 / Accepted: 19 January 2018 / Published: 22 January 2018
(This article belongs to the Section Biosensors)
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Abstract

Alizarin red S (ARS) was confined in layer-by-layer (LbL) films composed of phenylboronic acid-modified poly(ethyleneimine) (PBA-PEI) and carboxymethylcellulose (CMC) to study the voltammetric response to diol and polyol compounds. The LbL film-coated gold (Au) electrode and quartz slide were immersed in an ARS solution to uptake ARS into the film. UV-visible absorption spectra of ARS-confined LbL film suggested that ARS formed boronate ester (ARS-PBS) in the film. The cyclic voltammetry of the ARS-confined LbL film-coated electrodes exhibited oxidation peaks at −0.50 and −0.62 V, which were ascribed to the oxidation reactions of ARS-PBS and free ARS, respectively, in the LbL film. The peak current at −0.62 V increased upon the addition of diol or polyol compounds such as L-dopa, glucose, and sorbitol into the solution, depending on the concentration, whereas the peak current at −0.50 V decreased. The results suggest a possible use of ARS-confined PBA-PEI/CMC LbL film-coated Au electrodes for the construction of voltammetric sensors for diol and polyol compounds. View Full-Text
Keywords: voltammetric response; layer-by-layer film; alizarin red S; phenylboronic acid voltammetric response; layer-by-layer film; alizarin red S; phenylboronic acid
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Takahashi, S.; Suzuki, I.; Ojima, T.; Minaki, D.; Anzai, J.-I. Voltammetric Response of Alizarin Red S-Confined Film-Coated Electrodes to Diol and Polyol Compounds: Use of Phenylboronic Acid-Modified Poly(ethyleneimine) as Film Component. Sensors 2018, 18, 317.

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