期刊
DYES AND PIGMENTS
卷 206, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2022.110662
关键词
Fluorescence; BOPAHY; BOAPY; Computational chemistry; Boron complex; Spectral analysis
资金
- KU Leuven [C14/19/079, G0F8217N, G082215N]
- Research Foundation-Flanders (FWO) [ZKE0138, C14/19/78, G0E5321N]
- KU Leuven [C14/19/78]
- NAFOSTED - FWO Bilateral Program [C14/19/78]
- [1SC4719N]
This study investigated the photophysical properties of BOPAHY dyes and compared the results with predictions. The results showed that the substituent at the 5-position plays a crucial role in the absorption and fluorescence spectra as well as the molecular morphology.
BOPAHY dyes are a recently synthesized class of asymmetric highly fluorescent double boron complexed dyes. The photophysics of 5-substituted BOPAHY dyes was investigated by steady-state and time-resolved spectroscopy in liquid solution, dissolved in an organic glass and in neat spin-coated films. In the latter samples some derivatives show efficient fluorescence. The experimental results were compared with the predictions from DFT and time dependent DFT. The influence of the nature of the hetero-aromatic substituent in the 5-position on the features of the absorption and fluorescence spectra and the decay of the S-1-state is linked to the molecular morphology. The experiments show the choice of the 5-substituent is critical to avoid loss of a boron center in solution.
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