LUMINESCENT IRIDIUM(I), RHODIUM(I), AND PLATINUM(II) DITHIOLATE COMPLEXES.

Article abstract of DOI:10.1021/ja00345a019

A new series of Ir(I) complexes left bracket Ir(L)(L prime )(mnt) right bracket ** minus (L equals L prime equals CO, P(OPh)//3; L plus L prime equals 1,2-bis(diphenylphosphino)ethane; L equals CO, L prime equals PPh//3, CN** minus ; mnt equals maleonitriledithiolate) have been prepared which luminesce in the solid state at room temperature and in frozen glass media. Emission is also observed from the corresponding Rh(I) and Pt(II) complexes including the new compounds left bracket PtL//2(mnt) right bracket (L equals P(OEt)//3, P(OPh)//3; L//2 equals 1,5-cyclooctadiene, bis(diphenylphosphino)methane). At 77 K the solid-state emissions are highly structured and the highest energy emission maxima fall between 13. 7 and 18. 1 kcm** minus **1. Excitation spectra are also highly structured, mirroring the emission spectra. Emission lifetimes range from 8 to 400 mu s. From the evidence presented, the emission-absorption system for all of the complexes studied is assigned as a common singlet-triplet d- pi *(mnt) metal-to-ligand charge transfer.