Kumar, Amit and Srivastava, Ritu and Kadyan, Partap S. and Kamalasanan, Modeeparampil N. and Singh, Ishwar (2012) Synthesis, characterization, and optoelectronic properties of heteroleptic iridium complexes containing substituted 1,3,4-oxadiazole and beta-diketone as ligands. Journal of Coordination Chemistry , 63 (3). pp. 453-462. ISSN 0095-8972

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Abstract

The new heteroleptic iridium(III) complexes (BuOXD)(2)Ir(tta) and (BuOXD)(2)Ir(tmd) [BuOXD=2-(4-butyloxyphenyl)-5-phenyl[1,3,4]oxadiazolato-N4,C2, tta=1,1,1-trifluoro-4-thienylbutane-2,4-dionato, tmd 2,2,6,6-tetramethylheptane-3,5-dionato] have been synthesized and characterized. These complexes have two cyclometalated ligands ((CN)-N-boolean AND) and a bidentate diketone ligand (X) [(CN)-N-boolean AND)(2)Ir(X)], where X is a beta-diketone with trifluoromethyl, theonyl or t-butyl groups. The color tuning with the change in electronegativity of substituents in the beta-diketones has been studied. Photoluminescence spectra of the complexes showed peak emissions at 523 and 549 nm, respectively. The electroluminescent properties of these complexes have been studied by fabricating multi layer devices with device structure ITO/alpha-NPD/8% iridium complex doped CBP/BCP/Alq(3)/LiF/Al. The electroluminescence spectra also showed peak emissions at 526 and 570 nm for (BuOXD)(2)Ir(tta) and (BuOXD)(2)Ir(tmd), respectively. These metal complexes showed good thermal stability in air to 340 degrees C.

Item Type:	Article
Additional Information:	copyright for this article belongs to M/s Taylor & Francis
Subjects:	Chemistry > Inorganic Chemistry
Divisions:	UNSPECIFIED
Depositing User:	Users 27 not found.
Date Deposited:	19 Aug 2026 10:47
Last Modified:	19 Aug 2026 10:47
URI:	https://npl.csircentral.net/id/eprint/3373

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