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Effects of geometrical isomerism on emissive behaviour of heteroleptic cyclometalated Ir(III) complexes.
- Source :
-
Dalton Transactions: An International Journal of Inorganic Chemistry . 6/28/2021, Vol. 50 Issue 24, p8506-8511. 6p. - Publication Year :
- 2021
-
Abstract
- In this study, we report the emissive properties of a heteroleptic cyclometalated Ir(III) complex, [Ir(bzq)2(PBO)] (bzqH = benzo[h]quinoline; PBOH = 2-(2-hydroxyphenyl)benzoxazole). The complex, [Ir(C^N)2(N^O)], was synthesised and optically resolved using a chiral column. Two geometrical isomers, trans-(N,N) and cis-(N,N) isomers, were obtained as the major and minor products in an enantiopure form, respectively. Their molecular structures were determined using single crystal X-ray analysis. In the crystalline states, the intermolecular C–H⋯π interaction between PBO− and an H atom in bzq− was the main factor influencing molecular packing. When the complexes were dissolved in CH2Cl2 and excited at 430 nm under N2 atmosphere, yellow (λmax = 550 nm) and orange emissions (λmax = 570 nm) were observed for the trans-(N,N) and cis-(N,N) isomers, respectively, with the quantum yield higher for the former than the latter. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 14779226
- Volume :
- 50
- Issue :
- 24
- Database :
- Academic Search Index
- Journal :
- Dalton Transactions: An International Journal of Inorganic Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 151047516
- Full Text :
- https://doi.org/10.1039/d1dt00783a