title: Electrochemical deposition of the new manganese(II) Schiff-base complex on a gold template and its application for dopamine sensing in the presence of interfering biogenic compounds.
abstract: Facile and efficient template synthesis of new manganese(II) complex [Mn2(H2L)2](ClO4)2 (1) and its crystal structure are reported. Self-assembly leads to the formation of dinuclear, phenoxo-bridged closed species via exploitation of both binding subunits of the in situ formed new Schiff-base ligand. Gold electrode modified with self-assembled monolayers (SAMs) composed of synthesized complex 1 was applied as a voltammetric sensor for quantitative determination of dopamine (DA) in the presence of ascorbic (AA) and uric acids (UA). The linear relationship between the current response of dopamine at the potential of peak maximum and the concentration was found over a wide analyte concentration range (R(2)≥0.993, 1×10(-10)-8.5×10(-4)M) with a very good sensitivity (4.11Acm(-2)M(-1) at dE/dt=0.1Vs(-1)), high detection limit (6.8×10(-9)M) and excellent reproducibility. It has been proven that current peaks of dopamine, ascorbic and uric acids were clearly separated from each other, thus enabling selective detection of these compounds coexisting in a mixture.
authors.affiliation: Faculty of Chemistry, Adam Mickiewicz University in Poznań, Umultowska 89b, 61614 Poznań, Poland.
authors.forename: Adam
authors.initials: A
authors.lastname: Gorczyński
authors.affiliation: Faculty of Chemistry, Adam Mickiewicz University in Poznań, Umultowska 89b, 61614 Poznań, Poland.
authors.forename: Dawid
authors.initials: D
authors.lastname: Pakulski
authors.affiliation: Faculty of Chemistry, Adam Mickiewicz University in Poznań, Umultowska 89b, 61614 Poznań, Poland.
authors.forename: Martyna
authors.initials: M
authors.lastname: Szymańska
authors.affiliation: Faculty of Chemistry, Adam Mickiewicz University in Poznań, Umultowska 89b, 61614 Poznań, Poland.
authors.forename: Maciej
authors.initials: M
authors.lastname: Kubicki
authors.affiliation: Faculty of Chemistry, Adam Mickiewicz University in Poznań, Umultowska 89b, 61614 Poznań, Poland.
authors.forename: Kornela
authors.initials: K
authors.lastname: Bułat
authors.affiliation: Faculty of Chemistry, Adam Mickiewicz University in Poznań, Umultowska 89b, 61614 Poznań, Poland. Electronic address: violapat@amu.edu.pl.
authors.forename: Teresa
authors.initials: T
authors.lastname: Łuczak
authors.affiliation: Faculty of Chemistry, Adam Mickiewicz University in Poznań, Umultowska 89b, 61614 Poznań, Poland. Electronic address: telucz@amu.edu.pl.
authors.forename: Violetta
authors.initials: V
authors.lastname: Patroniak
mesh_terms: D001205:Ascorbic Acid / Q000032:analysis / Q000737:chemistry; D001562:Benzimidazoles / Q000737:chemistry; D056831:Coordination Complexes / Q000737:chemistry*; D004298:Dopamine / Q000032:analysis* / Q000737:chemistry; D055664:Electrochemical Techniques; D006046:Gold / Q000737:chemistry*; D008345:Manganese / Q000737:chemistry*; D012545:Schiff Bases / Q000737:chemistry*; D014527:Uric Acid / Q000032:analysis / Q000737:chemistry
chemical_list: D001562:Benzimidazoles; D056831:Coordination Complexes; D012545:Schiff Bases; D014527:Uric Acid; D008345:Manganese; D006046:Gold; D001205:Ascorbic Acid; D004298:Dopamine
keywords: Dopamine; Electrooxidation; Gold electrode; Manganese(II); SAMs; Schiff-base