Efficient electrogenerated chemiluminescence from osmium(ii) polypyridine systems containing tetraphenylarsine or diphenylphosphine ligands
The spectroscopy, electrochemistry and electrogenerated chemiluminescence (ECL) of five osmium(II) polypyridyl systems containing either phosphine or arsine chelating ligands are reported. ECL is generated in acetonitrile and mixed CH3CN–H2O (50 : 50 v/v) solutions with tri-n-propylamine (TPrA) as an oxidative–reductive coreactant. ECL efficiencies (ϕECL = photons emitted per redox event) between 0.15 and 8.43 are obtained using Ru(bpy)32+ (bpy = 2,2′-bipyridine) as a relative standard (ϕECL = 1). The ECL efficiency is dependent on both the nature of the ligands and the solvent media. The ECL spectra are identical to photoluminescence spectra indicating formation of the same excited states in both ECL and PL.
Pennington, Niall S., Mark M. Richter, and Brenden Carlson. "Efficient electrogenerated chemiluminescence from osmium (II) polypyridine systems containing tetraphenylarsine or diphenylphosphine ligands." Dalton Transactions 39, no. 6 (2010): 1586-1590.