A novel method to determine ciprofloxacin by enhanced electrochemiluminescence of Tb(bpy)23+–K2S2O8 system in aqueous solution

Abstract

A simple and rapid electrochemiluminescence (ECL) method is developed by using Tb(bpy) 2 3+ -K 2 S 2 O 8 system for the determination of trace amounts of ciprofloxacin (CPFX). Conditions for ECL emission were optimized. Under optimized condition, the linear range of ECL intensity versus concentrations of CPFX is 6 Â 10 À8 to 1.0 Â 10 À6 mol dm À3 with a relative standard deviation (R.S.D.) of 3.8% (n ¼ 11) and the detection limit is 1.4 Â 10 À9 mol dm À3 for CPFX. The ECL emission spectra (the peaks are at 490, 545, 585 and 620 nm) match the characteristic emission spectrum of Tb 3+ , indicating that the emission is from the excited state of Tb 3+ . The enhanced mechanism of Tb(bpy) 2 3+ -K 2 S 2 O 8 ECL system was proposed. This method was successfully applied to determine CPFX in tablets.

Interfacial interactions of hard polyelectrolyte-stabilized luminescent colloids with substrates

“…The antennae effect of fluoroquinolones on Tb(III)-centered luminescence is well documented, and has got wide application for analytical purposes [11,14,15,40,41].…”

“…A plenty of biorelevant substrates are chelating ligands able to complex with lanthanides [8][9][10]. Literature data represent fine examples of luminescent sensing of phosphates [10] and antibiotics [11][12][13][14][15] through a sensitization of lanthanide-centered luminescence in aqueous solutions.…”

Triblock copolymer-based luminescent organic–inorganic hybrids triggered by heating and fluoroquinolone antibiotics

“…(Scheme S1, Table S1). The structural similarity of the flouroquinolones restricts their fluorescent discrimination through the complex formation with lanthanide ions [40][41][42][43]. It is well known that complexation of fluoroquinilones to Ln 3+ occurs via carboxylate groups, which accounts for the insignificant effect of the nitrogen-containing moieties on the complex formation.…”

Supramolecular assemblies of triblock copolymers with hexanuclear molybdenum clusters for sensing antibiotics in aqueous solutions via energy transfer

“…The essential inertness of the apical ligands and the ways to increase it have been discussed in literature, [27][28][29][30][31][32][33][34] The FQs are of great interest from the viewpoint of their widespread application, 35 which in turn makes their analytical determination a rather challenging task. [36][37][38][39][40][41][42][43] The impact of the triblock copolymers nature in the substrate-induced luminescence is also discussed. The effect of zwitter-ionic and protonated forms of dioxacin on the steady state and time resolved luminescence of [Mo 6 I 14 ] 2À is compared with the related effect of acetate anions to reveal the main driving force and mechanism of the substrate induced sensitizing of [Mo 6 I 14 ] 2À luminescence in aqueous solutions of L64.…”