title: Synthesis, separation, and circularly polarized luminescence studies of enantiomers of iridium(III) luminophores.
abstract: A family of heteroleptic (C;N)2Ir(acac) and homoleptic fac-Ir(C;N)3 complexes have been synthesized and their photophysical properties studied (where C;N = a substituted 2-phenylpyridine and acac = acetylacetonate). The neutral Delta and Lambda complexes were separated with greater than 95% enantiomeric purity by chiral supercritical fluid chromatography, and the solution circular dichroism and circularly polarized luminescence spectra for each of the enantio-enriched iridium complexes were obtained. The experimentally measured emission dissymmetries (gem) for this series compared well with predicted values provided by time-dependent density functional theory calculations. The discovered trend further showed a correlation with the dissymmetries of ionic, enantiopure hemicage compounds of Ru(II) and Zn(II), thus demonstrating the applicability of the model for predicting emission dissymmetry values across a wide range of complexes.
authors.affiliation: Department of Chemistry, Princeton University, Princeton, New Jersey 08544, USA.
authors.forename: Frederick J
authors.initials: FJ
authors.lastname: Coughlin
authors.forename: Michael S
authors.initials: MS
authors.lastname: Westrol
authors.forename: Karl D
authors.initials: KD
authors.lastname: Oyler
authors.forename: Neal
authors.initials: N
authors.lastname: Byrne
authors.forename: Christina
authors.initials: C
authors.lastname: Kraml
authors.forename: Eli
authors.initials: E
authors.lastname: Zysman-Colman
authors.forename: Michael S
authors.initials: MS
authors.lastname: Lowry
authors.forename: Stefan
authors.initials: S
authors.lastname: Bernhard