H. Mochizuki
Mar 15, 2017
Citations
0
Influential Citations
5
Citations
Journal
Bulletin of the Chemical Society of Japan
Abstract
Three trifluoromethyl-substituted bis-styrylbenzenes were synthesized: 1,4-bis(2-trifluoromethylstyryl)benzene (2CF3), 1,4-bis(3-trifluoromethylstyryl)benzene (3CF3), and 1,4-bis(4-trifluoromethylstyryl)benzene (4CF3). Although these compounds did not exhibit marked differences in their solution-phase spectra, the fluorescence spectrum shape of 2CF3 in the solid state was different from those of 3CF3 and 4CF3, showing a longer peak wavelength and larger full width at half maximum. Furthermore, the fluorescence quantum yield of 2CF3 in the solid state was much higher than that in diluted solution, indicating the occurrence of aggregation-induced emission. The ionization potentials (IPs) decreased in the order of 2CF3 > 4CF3 > 3CF3, showing that the introduction of the trifluoromethyl group in the 3-position was most effective for decreasing IPs.