Molecular Crystals and Liquid Crystals, Vol.677, No.1, 34-41, 2018
2,4-Dimethylpyrrole Configured Fluorine-Boron Complexes
Dipyrrolydiketones BF2 complex was obtained by a simple synthesis and routinely characterized by NMR and HRMS technology. This BF2 containing dye shows strong emission in chloro-carbon solvents, for example chloroform, toluene, with the emission maximum in the blue-green region. No significant absorption or emission shift is observed in the spectra investigation. The rigid molecular framework contributes to it's highly emission character, which limited the energy dissipation to the environment. The emission quantum yield ranged from 0.23 to 0.42. In polycarbonate film, the emission shifted to longer wavelength 539 nm. In solid state, the emission shifted toward red furtherly (580 nm) and broadened the emission band significantly, demonstrating a strong intermolecular interaction. Emission decay also exhibited bicxponential declining kinetics. In all the case, the emission colors were demonstrated by International Commission on Illumination (CIE) chromaticity system.