Turning on Fluorescent Emission from C-Alkylation on Quinoxaline Derivatives
摘要:
Reduction on imine moiety (C=N) of quinoxalines by alkyl-/aryllithiums led to a geometrical change on the quinoxaline ring, thereby perturbing the electronic structure to turn on fluorescence emission. Such a structural change resulted in interrupted cyclic-ring systems with electron-donating amine (Sp(3)-type) and electron-accepting imine (Sp(2)-type) units bridged by a phenylene unit. Through either alkylation or arylation, a highly polarized electron donor-electron acceptor bipolar system was established in a single molecule with dramatically enhanced PL efficiency (up to 60%).
Turning on Fluorescent Emission from C-Alkylation on Quinoxaline Derivatives
作者:Ho-Jin Son、Won-Sik Han、Kyung-Ryang Wee、Dae-Hwan Yoo、Jong-Ho Lee、Soon-Nam Kwon、Jaejung Ko、Sang Ook Kang
DOI:10.1021/ol802287k
日期:2008.12.4
Reduction on imine moiety (C=N) of quinoxalines by alkyl-/aryllithiums led to a geometrical change on the quinoxaline ring, thereby perturbing the electronic structure to turn on fluorescence emission. Such a structural change resulted in interrupted cyclic-ring systems with electron-donating amine (Sp(3)-type) and electron-accepting imine (Sp(2)-type) units bridged by a phenylene unit. Through either alkylation or arylation, a highly polarized electron donor-electron acceptor bipolar system was established in a single molecule with dramatically enhanced PL efficiency (up to 60%).