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Highly emissive 4-carbazole-appended salen–indium complex: the effect of strong donor–acceptor interaction.
- Source :
-
Dalton Transactions: An International Journal of Inorganic Chemistry . 10/7/2023, Vol. 52 Issue 37, p13379-13386. 8p. - Publication Year :
- 2023
-
Abstract
- Herein, we report our findings on 4-carbazole (CBZ)-appended salen-based indium complexes, CBZIn1 and CBZIn2, which feature diimine bridges exhibiting different electron-accepting properties. Notably, CBZIn2 exhibited a significantly higher photoluminescence quantum efficiency (PLQY, ΦPL) in toluene than CBZIn1, with a value over 15 times greater (ΦPL = 57.7% for CBZIn2; ΦPL = 3.7% for CBZIn1). In particular, in the rigid state of THF at 77 K, CBZIn2 exhibited a near-unity PLQY of 98.2%. Even in the PMMA film, CBZIn2 maintained a high level of PLQY (ΦPL = 70.2%). These results can be attributed to the highly efficient radiative decay process based on intramolecular charge-transfer (ICT) transition between the moderately twisted CBZ, characterized by its conformational rigidity and the 1,2-dicyanoethylene-bridged salen, which exhibits a strong electron-accepting ability. Furthermore, these findings are supported by theoretical calculations. [ABSTRACT FROM AUTHOR]
- Subjects :
- *QUANTUM efficiency
*CARBAZOLE
*INDIUM
*PHOTOLUMINESCENCE
*TOLUENE
Subjects
Details
- Language :
- English
- ISSN :
- 14779226
- Volume :
- 52
- Issue :
- 37
- Database :
- Academic Search Index
- Journal :
- Dalton Transactions: An International Journal of Inorganic Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 172334024
- Full Text :
- https://doi.org/10.1039/d3dt02129g