플루오로알콕시 그룹에 의해 비평형 구조를 갖는 아로마틱 음이온의 도입을 통한 거시적 광학 비선형성 강화
- 주제(키워드) 비선형광학 , 유기결정
- 발행기관 아주대학교
- 지도교수 권오필
- 발행년도 2019
- 학위수여년월 2019. 2
- 학위명 석사
- 학과 및 전공 일반대학원 분자과학기술학과
- 실제URI http://www.dcollection.net/handler/ajou/000000028394
- 본문언어 영어
- 저작권 아주대학교 논문은 저작권에 의해 보호받습니다.
초록/요약
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.
more목차
1. Introduction 1
2. Experiments 5
3. Results and Discussion 13
4. Conclusion 35
5. Reference 36
