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플루오로알콕시 그룹에 의해 비평형 구조를 갖는 아로마틱 음이온의 도입을 통한 거시적 광학 비선형성 강화
- Author(s)
- 신명훈
- Advisor
- 권오필
- Department
- 일반대학원 분자과학기술학과
- Publisher
- The Graduate School, Ajou University
- Publication Year
- 2019-02
- Language
- eng
- Alternative Abstract
- This study reports a design strategy for efficient organic nonlinear optical crystals with a large macroscopic optical nonlinearity. In organic ionic crystals, edge-to-face π-π interactions between the cations and the anions contribute to decrease macroscopic optical nonlinearity, because they hinder supramolecular charge-transfer propagation. However, most the benchmark nonlinear optical crystals have been planar-shaped anions based on benzenesulfonate and naphthalenesulfonate, which may lead to increase of edge-to-face π-π interactions. To reduce edge-to-face π-π interactions, non-planar-shaped benzenesulfonate anion with trifluoromethoxy group having near-orthogonal conformations on aromatic rings is introduced. 4-(trifluoromethoxy)benzenesulfonate (OCF3) anions successfully widen the distances between the cations and the anions in the crystal, which lead to decrease of edge-to-face π-π interactions between the cations and the anions. 2-(4-hydroxystyryl)-1-methylquinolin-1-ium 4-(trifluoromethoxy)benzenesulfonate (OHQ-OCF3) crystals exhibit a larger macroscopic optical nonlinearity than 2-(4-hydroxystyryl)-1-methylquinolin-1-ium 4-methylbenzenesulfonate (OHQ-T) crystals having benchmark planar-shaped benzenesulfonate anion.
- Fulltext
- Appears in Collections:
- Graduate School of Ajou University > Department of Molecular Science and Technology > 3. Theses(Master)
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