Electrochemiluminescence of the Ru(bpy)32+/S2O82- System in Purely Aqueous Solution at Carbon Paste Electrode

Abstract

The electrochemiluminescence (ECL) of the Ru(bpy) 2 3 aS 2 O 2À 8 system in purely aqueous solution at a carbon paste electrode can be clearly seen with the naked eye for Ru(bpy) . In addition, a weak ECL signal was obtained when the potential was biased more negative than À0.6 V even in the absence of S 2 O 2À 8 .

Electrochemiluminescent Systems as Devices and Sensors

“…15 A strong ECL signal from the Ru(bipy) 3 2 þ /S 2 O 8 2À system, however, has been also detected at a carbon paste electrode in purely aqueous solution. 170 ECL studies of many ruthenium chelates other than Ru(bipy) 3 2 þ , including Ru(bprz) 3 2 þ 171,172 or Ru(phen) 3 2 þ 173 complexes, with use S 2 O 8 2À as a coreactant were also reported. Peroxydisulfate coreactant has been also applied in ECL studies of several aromatic compounds in the mixed CH 3 CN/C 6 H 6 solutions with finding that the formation of the emissive 1* R states is primarily caused by the R þ þ R À annihilation with R þ generated via oxidation of R by SO 4 .À .…”

Highly Sensitive Electrochemiluminescent Insecticide Sensor Based on ZnO Nanocrystals Anchored Nickel Foam for Determination of Imidacloprid in Real Samples

“…But at the higher concentration than 10 mM, the ECL signal intensity is decreased due to the prohibition of formation of SO 4 −. radicals , so 10 mM was chosen as the optimal concentration of K 2 S 2 O 8 in this study.…”

Novel gold nanocluster electrochemiluminescence immunosensors based on nanoporous NiGd–Ni2O3–Gd2O3 alloys

“…This may attribute to that the luminescence was inhibited because of the proton could be reduced easily at negative potential at low pH. In addition, the strong oxidant SO 4 •− was consumed via scavenging effect of OH -at high pH (Yao et al 2008;Xu et al 2000). Therefore, PBS with pH 7.4 was used as the working solution.…”