Electrogenerated chemiluminescence of the platinum (II) octaethylporphyrin/tri-n-propylamine system

The electrogenerated chemiluminescence (ECL) of platinum (II) octaethyl-porphyrin (PtOEP) in acetonitrile:methylene chloride (CH3CN:CH2Cl2, 50:50 v/v) and CH2Cl2 is reported. ECL was generated upon sweep to positive potentials using tri-n-propylamine (TPrA) as an oxidative–reductive coreactant. ECL efficiencies (ϕecl) of 0.18 in CH3CN:CH2Cl2 (50:50 v/v) and 3.90 in methylene chloride were obtained using Ru(bpy)3(PF6)2 (bpy = 2,2′-bipyridine) as a relative standard (ϕecl = 1). The ECL intensity peaks at a potential corresponding to oxidation of PtOEP and TPrA, and ECL emission spectra are nearly identical to photoluminescence emission spectra, indicating that emission is from the PtOEP triplet state.

Platinum (II) octaethyl-porphyrin undergoes electrogenerated chemiluminescence (ECL) using tri-n-propylamine as an oxidative–reductive coreactant. The electrochemistry, spectroscopy and ECL are discussed.Figure optionsDownload as PowerPoint slide