Tuning colorful luminescence of iridium(III) complexes from blue to near infrared
摘要:
Five cyclometalated Ir(III) complexes with high phosphorescence efficiencies have been synthesized from 1,3-bis (1-propyl-1H-benzo[d] imidazol-2-yl)benzene (Pro-MBImB) or 2-(2,4-Difluorophenyl)pyridine (Fppy) based ligands with different ancillary ligands. It was found that these complexes have a wide range of emitting wavelength, covering the whole visible region, with moderately long lifetime (81-2159 ns) and high quantum yield (75-89%). Especially, the introduction of electron withdrawing - COOEt group onto the ancillary ligand extends the emission wavelength and affords good red-light emitting properties, and the obtained CIE (Commission Internationale de L'Eclairage) coordinates of (0.69, 0.31) in complex 2 are close to the standard red light and approaching near infrared region.
Tuning colorful luminescence of iridium(III) complexes from blue to near infrared
摘要:
Five cyclometalated Ir(III) complexes with high phosphorescence efficiencies have been synthesized from 1,3-bis (1-propyl-1H-benzo[d] imidazol-2-yl)benzene (Pro-MBImB) or 2-(2,4-Difluorophenyl)pyridine (Fppy) based ligands with different ancillary ligands. It was found that these complexes have a wide range of emitting wavelength, covering the whole visible region, with moderately long lifetime (81-2159 ns) and high quantum yield (75-89%). Especially, the introduction of electron withdrawing - COOEt group onto the ancillary ligand extends the emission wavelength and affords good red-light emitting properties, and the obtained CIE (Commission Internationale de L'Eclairage) coordinates of (0.69, 0.31) in complex 2 are close to the standard red light and approaching near infrared region.
Provided is a process for preparing oligomers from an alkane. The process comprises (a) contacting an alkane under dehydrogenation conditions in the presence of a dehydrogenation catalyst such as an iridium catalyst complex comprising iridium complexed with a benzimidiazolyl-containing ligand to form olefins, and (b) contacting the olefins prepared in step (a) under oligomerization conditions with an oligomerization catalyst such as a nickel, platinum or palladium metal catalyst complex comprising the metal complexed with a nitrogen containing bi- or tridentate ligand to prepare oligomers of the olefins, and hydrogenating the olefin oligomers. In one embodiment, the ligands of the catalyst complexes in step (a) and step (b) can be the same.
Tuning colorful luminescence of iridium(III) complexes from blue to near infrared
作者:Chao-Jie Li、Shao-Yun Yin、Hai-Ping Wang、Zhang-Wen Wei、Mei Pan
DOI:10.1016/j.jphotochem.2019.04.030
日期:2019.6
Five cyclometalated Ir(III) complexes with high phosphorescence efficiencies have been synthesized from 1,3-bis (1-propyl-1H-benzo[d] imidazol-2-yl)benzene (Pro-MBImB) or 2-(2,4-Difluorophenyl)pyridine (Fppy) based ligands with different ancillary ligands. It was found that these complexes have a wide range of emitting wavelength, covering the whole visible region, with moderately long lifetime (81-2159 ns) and high quantum yield (75-89%). Especially, the introduction of electron withdrawing - COOEt group onto the ancillary ligand extends the emission wavelength and affords good red-light emitting properties, and the obtained CIE (Commission Internationale de L'Eclairage) coordinates of (0.69, 0.31) in complex 2 are close to the standard red light and approaching near infrared region.