Self-Assembled Submonolayer of β-Cyclodextrins on Gold Electrode for the Selective Determination of 4-Aminobiphenyl

Autor:	Carmen Quintana, Lucas Hernández, Ana M. Esteva, Pedro Hernández, Idania Carrillo
Rok vydání:	2011
Předmět:	Chemistry Inorganic chemistry Analytical chemistry β cyclodextrins Square wave Analytical Chemistry Self assembled chemistry.chemical_compound 4-Aminobiphenyl Desorption Electrode Electrochemistry Molecule Selectivity
Zdroj:	Electroanalysis. 23:2862-2869
ISSN:	1040-0397
DOI:	10.1002/elan.201100499
Popis:	The formation of an inclusion complex between 4-aminobiphenyl (4-AB) and β-cyclodextrin molecules (β-CD), allows the use of thiolated β-CDs as chemi-adsorbed material on a Au electrode as a self-assembled submonolayer for the selective square wave voltammetric determination of 4-AB. The submonolayer was characterized by reductive desorption and an association constant of 1.2×104 L/mol was obtained. The optimization of variables yielded a linear dependence of ip/4-AB concentration in the range of 10−5 to 10−4 mol/L. The selectivity of the method was evaluated in the presence of other aromatic amines obtaining better results with the modified electrode. This methodology was applied to the voltammetric determination of 4-AB in wastewater samples.
Databáze:	OpenAIRE
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