Abstract
Abstract The present study, introduces the beneficial catalyze effects of dinuclear copper(II) complexes on the luminol chemiluminescence (CL) reaction. Two new dinuclear copper(II) complexes ([Cu 2 (L) 2 (TAE)]X 2 and [Cu 2 (L′) 2 (TAE)]X 2 ), where TAE = tetraacetylethane; L = N,N′-dibenzyl ethylenediamine and L′ = N,N-dimethyl-N′-benzylethylenediamine; X = ClO 4 , have exhibited highly efficient catalytic activity of luminol CL as an artificial peroxidase model at pH as low as 7.5 in water in the presence of H 2 O 2 and dissolved O 2 even in the absence of H 2 O 2 at elevated pH (∼12). The effects of the reactant concentrations and some amino acids on luminol CL were also investigated. Among them, l -cysteine (CySH) containing -SH group was observed to inhibit the CL signal of the luminol-H 2 O 2 -dinuclear copper(II) complex. A similar phenomenon also was observed for glutathione (GSH), which made CL probe of peroxidase-like dinuclear copper(II) complexes applicable for the determination of such compounds in biological media.
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