title: A catechol-terminated self-assembled monolayer at the surface of a gold electrode and its application for the electrocatalytic determination of dopamine.
abstract: An electroactive self-assembled monolayer was fabricated by covalent attachment of protocatechuic acid at a gold surface and its electrochemical behavior was investigated using cyclic voltammetry. The modification involves a three-step method: (i) preparation of a cysteamine self-assembled monolayer, (ii) activation of the carboxylic groups of protocatechuic acid in solution and (iii) modification of cysteamine self-assembled monolayers by activated protocatechuic acid to functionalize the self-assembled monolayer by catechol-terminated groups. This resulting thin film modified electrode was tested successfully for the electrocatalytic determination of dopamine in aqueous solution.
authors.affiliation: Department of Chemistry, Shahid Bahonar University of Kerman, P.O. Box 76175-133, Kerman, Iran. a_salmanipour_k@yahoo.com
authors.forename: Ashraf
authors.initials: A
authors.lastname: Salmanipour
authors.forename: Mohammad Ali
authors.initials: MA
authors.lastname: Taher
mesh_terms: D002138:Calibration; D002384:Catalysis; D002396:Catechols / Q000737:chemistry*; D003543:Cysteamine / Q000737:chemistry; D004298:Dopamine / Q000032:analysis*; D055664:Electrochemical Techniques / Q000295:instrumentation / Q000379:methods*; D004566:Electrodes; D006046:Gold / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D062385:Hydroxybenzoates / Q000737:chemistry; D057230:Limit of Detection; D013499:Surface Properties
chemical_list: D002396:Catechols; D062385:Hydroxybenzoates; C009091:protocatechuic acid; D003543:Cysteamine; D006046:Gold; C034221:catechol; D004298:Dopamine