Liuwei Wei

TL;DR: In this paper, a pair of chiral bis-cyclometalated phosphorescent iridium(III) isocyanide complexes is designed and synthesized, which exhibits almost the same photophysical properties and obvious mirror image in circular dichroism spectrum.

Abstract: One homoleptic facial and five novel highly efficient blue heteroleptic iridium(III) complexes were designed and synthesized by selecting 2-(4-fluoro-3-(trifluoromethyl)phenyl)pyridine as cyclometalated ligands and 2,4-pentanedione, 2-(3-(trifluoromethyl)-1H-1,2,4-triazol-5-yl)pyridine, picolinic acid, 2-(1H-imidazol-2-yl)pyridine and 2-(1H-tetrazol-5-yl)pyridine as ancillary ligands, respectively. The alternation of ancillary ligands could finely tune the photophysical properties of the phenylpyridine-based complexes, particularly with respect to emission wavelength, photoluminescence quantum yield (ΦPL), full width at half maximum (FWHM), etc. The phosphors designed not only exhibit excellent solubility in commonly used solvents with robust chemical stability but also show bright emissions in the pure blue region with very high absolute ΦPL up to 0.98 in solution and relatively narrow FWHMs up to 52 nm. Furthermore, based on these highly efficient blue phosphors, high-performance partially solution-processed blue organic light-emitting diodes have been successfully fabricated. The electroluminescence peak, 1931 Commission Internationale de L’Eclairage coordinate and FWHM of the device based on Ir4 are all superior to the device based on FIrpic. In addition, the maximum efficiencies of the device based on Ir4 (21.15 cd A−1, 12.07 lm W−1) are also higher than those of the device based on FIrpic (18.89 cd A−1, 11.26 lm W−1) under the same conditions.

TL;DR: In this paper, a series of aromatic chlorine-based high-efficiency blue iridium(III) phosphors (Ir1-Ir4) containing various ancillary ligands was designed and prepared, which showed intensive blue emissions with PL peaks of 468-476 nm and a high ΦPL of 0.70-0.85 in dichloromethane.

TL;DR: In this paper, a water probe based on an Ir(III) complex with 5-formamide-1,10-phenanthroline as an N^N ligand has been designed and synthesized.

TL;DR: In this paper, a series of anionic iridium(III) complexes with different C^N ligands were designed and investigated their oxygen-sensing capability in solution and living cells.