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Issue 2, 2012
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A cationic iridium(iii) complex showing aggregation-induced phosphorescent emission (AIPE) in the solid state: synthesis, characterization and properties

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Abstract

We report the synthesis and characterization of two cationic iridium(III) complexes with dendritic carbazole ligands as ancillary ligands, namely, [Ir(ppy)2L3]PF6 (1) and [Ir(ppy)2L4]PF6 (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.

Graphical abstract: A cationic iridium(iii) complex showing aggregation-induced phosphorescent emission (AIPE) in the solid state: synthesis, characterization and properties

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Supplementary files

Article information


Submitted
27 Jun 2011
Accepted
21 Sep 2011
First published
01 Nov 2011

Dalton Trans., 2012,41, 523-530
Article type
Paper

A cationic iridium(III) complex showing aggregation-induced phosphorescent emission (AIPE) in the solid state: synthesis, characterization and properties

G. Shan, L. Zhang, H. Li, S. Wang, D. Zhu, P. Li, C. Wang, Z. Su and Y. Liao, Dalton Trans., 2012, 41, 523
DOI: 10.1039/C1DT11215E

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