| 초록 |
A series of heteroleptic Ir(III) complexes composed of 3-(pyridin-2-yl)benzene-1-sulfonyl fluoride (SO2F) as the main ligand and such ancillary ligands as acetylacetonate [Ir(SO2F)2(acac)] (acac), picolinate [Ir(SO2F)2(pic)] (pic), and tetrakis-pyrazolyl borate [Ir(SO2F)2(bor)] (bor) were prepared, and their emission behaviors depending on the ancillary ligands were systematically investigated. Within the context to delineate the sulfonyl group effect, emission properties of the ancillary ligands have been scrutinized by means of emission photo-kinetics: a blue-shift emission is observed on going from acac (λmax = 490 nm) to bor (λmax = 460 nm). Density-functional theory (DFT) and time-dependent density functional theory (TD-DFT) calculations were employed to investigate the geometries, electronic structures and photophysical properties of three phosphorescent Ir(III) complexes. |
