Acceptor or donor (diaryl B or N) substituted octupolar truxene: synthesis, structure, and charge-transfer-enhanced fluorescence.
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.
Yuan
Mao-Sen
MS
State Key Laboratory of Crystal Materials, Shandong University, 250100 Jinan, P.R. China.
Fang
Qi
Q
Liu
Zhi-Qiang
ZQ
Guo
Jian-Ping
JP
Chen
Hong-Yu
HY
Yu
Wen-Tao
WT
Xue
Gang
G
Liu
Dian-Sheng
DS