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Triphenylamine-based N,O-bidentate BF2 complexes: synthesis and photophysical properties.
- Source :
-
New Journal of Chemistry . 12/7/2023, Vol. 47 Issue 45, p20793-20799. 7p. - Publication Year :
- 2023
-
Abstract
- In this contribution, we report the design and synthesis of two N,O-bidentate BF2 dyes (TTBKI-1 and TTBKI-2), with excellent optical properties like large Stokes shifts, strong solvatofluorochromism, and bright emission in solution, aggregated and solid states. Formation of a push–pull electron system resulted from the introduction of a triphenylamine unit as an excellent donor and a NBF2O moiety as an acceptor. Meanwhile, by further extending π-conjugation, the introduction of a thiophene unit resulted in a red-shift of absorption/emission wavelengths. Higher fluorescence quantum yields were obtained by TTBKI-1 and TTBKI-2 in nonpolar solvents. However, with an increase in the solvent polarity, a large bathochromic shift was observed in emission wavelengths but with a dramatic decrease in emission efficiency. Furthermore, as a typical aggregation-induced emission (AIE) unit, triphenylamine could reduce intermolecular π–π stacking in the aggregated state. TTBKI-1 and TTBKI-2 exhibited AIE properties in THF/H2O mixtures with high water fractions and showed bright solid-state emission. [ABSTRACT FROM AUTHOR]
- Subjects :
- *TRIPHENYLAMINE
*FLUORESCENCE yield
*STOKES shift
*OPTICAL properties
Subjects
Details
- Language :
- English
- ISSN :
- 11440546
- Volume :
- 47
- Issue :
- 45
- Database :
- Academic Search Index
- Journal :
- New Journal of Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 173720240
- Full Text :
- https://doi.org/10.1039/d3nj04270g