title: An efficient optical-electrochemical dual probe for highly sensitive recognition of dopamine based on terbium complex functionalized reduced graphene oxide.
abstract: A novel organic-inorganic hybrid sensor based on diethylenetriaminepentaacetic acid (DTPA) modified reduced graphene oxide (RGO-DTPA) chelated with terbium ions allows detection of dopamine (DA) through an emission enhancement effect. Its luminescence, peaking at 545 nm, has been improved by a factor of 25 in the presence of DA (detection limit = 80 nM). In addition, this covalently bonded terbium complex functionalized reduced graphene oxide (RGO-DTPA-Tb) can be successfully assembled on a glassy carbon electrode. The assay performed through differential pulse voltammetry (DPV) yielded obvious peak separation between DA and excessive amounts of the interfering ascorbic acid (AA).
authors.affiliation: School of Chemistry and Environment, South China Normal University, Guangzhou 510006, P.R. China.
authors.forename: Zhan
authors.initials: Z
authors.lastname: Zhou
authors.forename: Qianming
authors.initials: Q
authors.lastname: Wang
mesh_terms: D001205:Ascorbic Acid / Q000737:chemistry; D056831:Coordination Complexes / Q000138:chemical synthesis / Q000737:chemistry*; D004298:Dopamine / Q000032:analysis*; D055664:Electrochemical Techniques; D004566:Electrodes; D006108:Graphite / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry; D004369:Pentetic Acid / Q000737:chemistry; D013725:Terbium / Q000737:chemistry*
chemical_list: D056831:Coordination Complexes; D010087:Oxides; D013725:Terbium; D006108:Graphite; D004369:Pentetic Acid; D001205:Ascorbic Acid; D004298:Dopamine