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The characterization of 5-{[4-(4-mercapto) phenylmethoxy] phenyl}-10, 15, 20-tris (phenyl) porphyrin cobalt (II) self-assembled monolayers (SAMs) and its electrocatalytic oxidation for ascorbic acid
X. Lu et al./Materials Chemistry and Physics 77(2002)952-957，-0001，（）：
Agold electrode modified by 5-{[4-(4-mercapto) phenylmethoxy] phenyl}-10, 15, 20-tris (phenyl) porphyrin cobalt (II) (MPPTPCo (II)) has been prepared. The properties of the modified electrode were investigated by scanning electronic microscopy (SEM) and X-ray photoelectron spectroscopy (XPS) as well as electrochemical methods. The MPPTPCo (II)-SAM (SAM: self-assembled monolayer) modified electrode could successfully be used for the electrocatalytic oxidation of ascorbic acid (AA). The catalytic currents increased linearly with AA concentration in the range of 1.2×10−8-3.9×10−5 mol l−1 with the correlation coefficient of 0.9944. The detection limit was 2.6×10−9 mol l−1 with 10 min accumulation.
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