Effects of Substitution on Solid-State Fluorescence in 9-Aryl-9-methyl-9H-9-silafluorenes
AbstractAromatic groups were incorporated into 9H-9-silafluorene units at the 9-position (mono-9H-silafluorenes) and 9,9′-positions (di-9H-9-silafluorenes). The aryl substituents showed weak conjugation to the 9H-9-silafluorene for 9-aryl substituted ones 1–7 and a 9,9′-phenylene substituted one (compound 8) and they exhibited similar absorption and emission spectra. The 9H-9-silafluorene 10 containing a 5,5′-(2,2′-bithiophenyl) group showed a significantly red-shifted absorption and fluorescence maxima in the solid-state. Single-crystal X-ray diffraction studies found J-type aggregated structures formed by intermolecular CH–π interactions (ca. 2.6–2.7 Å). Density functional theory (DFT), time-dependent DFT (TD-DFT), and configuration interaction single (CIS) calculations were conducted to explain the observed optical properties. View Full-Text
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Yamanoi, Y.; Nakashima, T.; Shimada, M.; Maeda, H.; Nishihara, H. Effects of Substitution on Solid-State Fluorescence in 9-Aryl-9-methyl-9H-9-silafluorenes. Molecules 2016, 21, 1173.
Yamanoi Y, Nakashima T, Shimada M, Maeda H, Nishihara H. Effects of Substitution on Solid-State Fluorescence in 9-Aryl-9-methyl-9H-9-silafluorenes. Molecules. 2016; 21(9):1173.Chicago/Turabian Style
Yamanoi, Yoshinori; Nakashima, Takayuki; Shimada, Masaki; Maeda, Hiroaki; Nishihara, Hiroshi. 2016. "Effects of Substitution on Solid-State Fluorescence in 9-Aryl-9-methyl-9H-9-silafluorenes." Molecules 21, no. 9: 1173.
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