Room-temperature combinatorial screening of cyclometallated iridium(III) complexes for a step towards molecular control of colour purity
A library of emission spectra of 90 bis-cyclometallated iridium complexes has been obtained using a simple combinatorial approach performed at room temperature. Trends in emission maxima are rationalized using Hammett parameters and invoking inter ligand energy transfer (ILET) processes. The screening approach allowed us to observe trends in the broadness of emission spectra opening the way for a rational approach to the engineering of the emission colour purity at a molecular level. Finally limitations to the screening strategy are discussed using a case study that involves two different monodentate ligands.
Keywords: Emitting Electrochemical-Cells ; Electron-Transporting Materials ; Interligand Energy-Transfer ; Ancillary Ligands ; Highly Efficient ; Phosphorescence Color ; Ir(Iii) Complexes ; Spectroscopic Properties ; Oxygen Sensor ; Light
Record created on 2011-12-16, modified on 2016-08-09