Enhanced Electrochemiluminescence of Luminol on Indium Tin Oxide Modified with Dendrimer‐Encapsulated Au Nanoparticles

Abstract

Enhanced electrochemiluminescence (ECL) of luminol was reported with the use of dendrimer‐encapsulated Au nanoparticle (Au DEN)‐modified ITOs in the presence of hydrogen peroxide, which was applied for sensitive ECL‐based electroanalysis of hydrogen peroxide. The enhanced ECL of luminol in the presence of hydrogen peroxide was attributed to facile electrochemical oxidation of luminol/hydrogen peroxide on the Au DEN‐modified ITOs at potentials as low as ∼0.4 V (vs. Ag/AgCl). Spooling ECL spectroscopy measurements indicated that the enhanced ECL emission of luminol/hydrogen peroxide system on the Au DEN‐modified ITOs originated from excited 3‐aminophthalate as same as that obtained on bare ITOs. Stability of Au DENs on ITO surfaces was also addressed and found to be closely related with the presence of chloride ions in electrolyte solutions.

Aluminum Complexes of N2O23– Formazanate Ligands Supported by Phosphine Oxide Donors

“…Spooling ECL spectroscopy is an ideal technique to monitor in real time the evolution and devolution of ECL during the scanning of applied potentials . As shown in Figure c, the ECL onset potential was found at t = 10 s (0.26 V), and the ECL spectra showed a peak wavelength of 735 nm.…”

Tailoring Catalytic Activity of Pt Nanoparticles Encapsulated Inside Dendrimers by Tuning Nanoparticle Sizes with Subnanometer Accuracy for Sensitive Chemiluminescence-Based Analyses

“…First, the chemiluminescence spectra display maximum intensities at the same wavelength (ca. 440 nm), corresponding to the light emission of excited 3-aminophthalate anions, − in both the presence and absence of the Pt DENs. This indicates that the chemiluminescence emission in the presence of the Pt DENs originates from the same emitting species (i.e., the excited 3-aminophthalate anions) as that in the absence of the Pt DENs.…”

Probing Excimers of Pt(II) Compounds with Phenyl‐1,2,3‐Triazolyl and Pyridyl‐1,2,4‐Triazolyl Chelate Ligands by Means of Electrochemiluminescence

“…Spooling ECL spectroscopy involves the real‐time monitoring of ECL during a potential scan; this allows the visualization of the rise and fall of the ECL in the potentiodynamic process . Figure shows the spooling ECL spectra of Pt1 in the presence of 25 mM of TPrA, as the potential was scanned between 0.000 V and 1.500 V for a single cycle.…”