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Acceptor or donor (diaryl B or N) substituted octupolar truxene: synthesis, structure, and charge-transfer-enhanced
Mao-Sen Yuan1, Qi Fang, Zhi-Qiang Liu
1State Key Laboratory of Crystal Materials, Shandong University, 250100 Jinan, P.R. China.
Abstract:
Two diaryl B- and N-substituted truxene charge-transfer compounds B3 and N3 have been synthesized. The fluorescence intensities of several nonfunctionalized truxene compounds are 1 order of magnitude weaker than that of B3 and N3. To reveal the structure-property correlations, the X-ray structures of B3 and N3 and their precursors 3 and 4 have been determined. The extended molecular dimension, the especially shortened B-C bond, and the improved planarity of B3 can serve as direct structural evidence for the charge transfer.
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