Jian Li, Linlin Liu, Pengge Wang
Jul 31, 2014
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0
Influential Citations
13
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Journal
Sensors and Actuators B-chemical
Abstract
Abstract Phenol and 3-hydroxyphenylboronic acid were electrochemically co-polymerized on a glassy carbon electrode in the presence of phenazine methosulfate (PMS), to form redox-poly(phenol- co -3-hydroxyphenylboronic acid). The as-synthesized phenylboronic acid bearing redox-polymer was characterized by UV–visible spectroscopy and cyclic voltammetry. The behavior of Fe(CN) 6 3− catalytic reduction by electro-generated PMS red via a redox cycling was studied. With the addition of saccharide, a stable negative charged surface was formed owing to the generation of phenylboronate ester and then limited the access of Fe(CN) 6 3− due to electrostatic repulsion. The electrochemical signal amplification of attenuated Fe(CN) 6 3− was dependent on the concentration of saccharide. The dynamic ranges of the fabricated electrochemical sensor were 1–100 μM for d -fructose, 10–300 μM for d -mannose and 20–500 μM for d -glucose, respectively. The detection limits were ca. 0.3 μM for d -fructose, ca. 3.5 μM for d -mannose and ca. 7.8 μM for d -glucose, respectively.