title: A cationic iridium(III) complex showing aggregation-induced phosphorescent emission (AIPE) in the solid state: synthesis, characterization and properties.
abstract: We report the synthesis and characterization of two cationic iridium(III) complexes with dendritic carbazole ligands as ancillary ligands, namely, [Ir(ppy)(2)L3]PF(6) (1) and [Ir(ppy)(2)L4]PF(6) (2), where L3 and L4 represent 3,8-bis(3,6-di-tert-butyl-9H-carbazol-9-yl)-1,10-phenanthroline and 3,8-bis(3',6'-di-tert-butyl-6-(3,6-di-tert-butyl-9H-carbazol-9-yl)-3,9'-bi(9H-carbazol)-9-yl)-1,10-phenanthroline, respectively. Their photophysical properties have been investigated and compared. The results have shown that complex 2 is aggregation-induced phosphorescent emission (AIPE) active and exhibits the highest photoluminescent quantum yield (PLQY) of 16.2% in neat film among the reported cationic Ir(III) complexes with AIPE activity. In addition, it also enjoys redox reversibility, good film-forming ability, excellent thermal stability as well as off/on luminescence switching properties, revealing its potential application as a candidate for light-emitting electrochemical cells and organic vapor sensing. To explore applications in biology, 2 was used to image cells.
authors: Institute of Functional Material Chemistry, faculty of chemistry, Northeast Normal University, Changchun, 130024, Jilin, People's Republic of China.
authors: Guo-Gang
authors: GG
authors: Shan
authors: Ling-Yu
authors: LY
authors: Zhang
authors: Hai-Bin
authors: HB
authors: Li
authors: Shuang
authors: S
authors: Wang
authors: Dong-Xia
authors: DX
authors: Zhu
authors: Peng
authors: P
authors: Li
authors: Chun-Gang
authors: CG
authors: Wang
authors: Zhong-Min
authors: ZM
authors: Su
authors: Yi
authors: Y
authors: Liao
mesh_terms: D002227:Carbazoles / Q000737:chemistry*; D002412:Cations; D045744:Cell Line, Tumor; D056831:Coordination Complexes / Q000138:chemical synthesis* / Q000737:chemistry; D004563:Electrochemistry; D006801:Humans; D007495:Iridium / Q000737:chemistry*; D008024:Ligands; D049449:Luminescence; D008163:Luminescent Measurements; D009682:Magnetic Resonance Spectroscopy; D018625:Microscopy, Atomic Force; D008956:Models, Chemical; D015394:Molecular Structure; D010084:Oxidation-Reduction; D010777:Photochemistry; D011789:Quantum Theory; D014961:X-Ray Diffraction
chemical_list: D002227:Carbazoles; D002412:Cations; D056831:Coordination Complexes; D008024:Ligands; D007495:Iridium