Electrogenerated chemiluminescence from polymer-bound ortho-metallated iridium(III) systems

Three ortho-metallated iridium complexes whose emission maxima fall in different regions of the electromagrictic spectrum were bound in either Nafion or poly(9-vinylcarbazolc) and their electrogenerated chemiluminescence (ECL) reported. The reaction of F(Ir)pic [bis(3.5-difluoro-2-(2-pyridyl)phenyl-(2-carboxypyridyl)-iridium III] with the oxidative-reductive co-reactant tri-n-propylaminc (TPrA) resulted in ECL when the iridium complex was bound in Nation, No significant ECL was observed for (btp)(2)Ir(acac) (bis[2.(2'-benzothienyl)-pyridinato-N.C3'](acetylacetonite)lr(III)). and lr(ppy); (where ppy = 2-phenylpyridine) under these conditions. However, all three compounds displayed ECL with TPrA when bound in poly(9-vinylcarbazole), C'opyright (c) 2005 John Wiley & Sons, Ltd.