TITLE

The electrochemical behavior of p-benzenediol on a self-assembled monolayers Pt electrode modified with N-(2-mercapto-1,3,4-thiadiazol-5-yl)- N′-(4-substituted-arylacetyl) urea

AUTHOR(S)
Chuan-yin Liu; Ji-ping Yao; Hong-wu Tang; Sheng-ping Zhu; Jun-fu Hu
PUB. DATE
December 2006
SOURCE
Analytical & Bioanalytical Chemistry;Dec2006, Vol. 386 Issue 6, p1905
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Two novel N-(2-mercapto-1,3,4-thiadiazol-5-yl)- N′-(4-substituted-arylacetyl) urea compounds have been synthesized, characterized by NMR and MS, and used as self-assembly reagents to form self-assembled monolayers (SAMs) on Pt electrodes. The modified electrodes were characterized by electrochemical methods. The electrochemical behavior of p-benzenediol at the SAMs electrodes was investigated. It was found that the electrochemical response to p-benzenediol is controlled by diffusion and can be electrocatalyzed to obtain more symmetrical redox peaks and higher voltammetric current response at the SAMs electrodes, with a peak separation of 80 mV. For p-benzenediol the process at the SAMs electrodes is quasi-reversible with a rate constant of 0.6742 s−1. The SAMs electrodes have been used to determine p-benzenediol by differential pulse voltammetry. The peak current was linear for concentrations of p-benzenediol in the range 1×10−7−5×10−4 mol L−1 and the detection limit was 4.0×10−8 mol L−1. The SAMs electrodes were used to determine p-benzenediol in real photographic developer and in a synthetic waste water sample; the standard addition recovery was in the range 96.6–100.4%. [Figure not available: see fulltext.]
ACCESSION #
23150747

 

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