| 초록 |
In this study, we report on the synthesis and photopysical characterization of heteroleptic cyclometalated sulfonyl-substitued Iridium(III) complexes with ancillary ligands, such as the Ir(C^N)2(ancillary ligand), (C^N = 3-(pyridin-2-yl)benzene-1-sulfonyl fluoride (SO2F), 2-(3-(trifluoromethylsulfonyl)phenyl)pyridine (SO2CF3); ancillary ligand = acetylacetone (acac), borate (bor) and picolinate (pic)). A systematic blue-shift on the emission spectra is observed on the variation of ancillary ligand from acac (λmax = 490 nm) to bor (λmax = 460 nm). Density-functional theory (DFT) calculations on the HOMOs and LUMOs for this series show a trend similar to those observed from photophysical and electrochemical analyses. The sulfonyl-substituted Iridium complexes having bor moiety as ancillary group (Ir(SO2F)2(bor) and Ir(SO2CF3)2(bor)) were shown to be a potential blue-emitting material. |
