Luminescent solvent-free liquids based on Schiff-base boron difluoride complexes with polyethylene glycol chains.
basic_science · Level V
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- Record sourced from PubMed, PMID 38351893.
- Also identified by DOI 10.1039/d3sm01590d.
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Abstract
A series of Schiff-base boron difluoride complexes with polyethylene glycol chains were synthesized and their photophysical properties were examined. These complexes maintained the solvent-free liquid state even at room temperature and their glass transition temperatures (<i>T</i><sub>g</sub>) were determined to be around -40 °C. The complexes showed blue to yellow luminescence under UV irradiation in the solvent-free liquid state with good emission quantum yields (<i>Φ</i>) of up to 0.26. The luminescence colour could also be tuned by dissolving organic dyes in the blue luminescent liquid sample. Density functional theory (DFT) and time-dependent (TD) DFT calculations were performed to further understand the photophysical properties.