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초록
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%).
키워드
AMORPHOUS MOLECULAR MATERIALS; CHARGE-TRANSFER PHOTOPHYSICS; ELECTRON-TRANSFER; ELECTROLUMINESCENCE; BIPOLAR; DYES; CHROMOPHORES; POLYMERS; FLUORENE; GREEN
- 제목
- Turning on Fluorescent Emission from C-Alkylation on Quinoxaline Derivatives
- 저자
- Son, Ho-Jin; Han, Won-Sik; Wee, Kyung-Ryang; Yoo, Dae-Hwan; Lee, Jong-Ho; Kwon, Soon-Nam; Ko, Jaejung; Kang, Sang Ook
- 발행일
- 2008-12-04
- 유형
- Article
- 저널명
- Organic Letters
- 권
- 10
- 호
- 23
- 페이지
- 5401 ~ 5404