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클로로벤젠 설포네이트 음이온에 기반을 둔 비선형 광학 퀴놀리니움 결정
- Author(s)
- 이승준
- Advisor
- 권오필
- Department
- 일반대학원 분자과학기술학과
- Publisher
- The Graduate School, Ajou University
- Publication Year
- 2017-02
- Language
- eng
- Keyword
- Co-crystals; Chlorobenzenesulfonate; Crystals
- Alternative Abstract
- We designed and synthesized the acentric core structure OHQ (2-(4-hydroxystyryl)-1-methylquinolinium) cation with 4-chlorobenzenesulfonate counter anions, named OHQ-CBS. OHQ-CBS single crystals were obtained by the various solution growth methods. We assured the non-centrosymmetric molecular arrangement by the second harmonic generation (SHG) test and X-ray diffraction analysis. In addition, we investigated the physical properties, such as thermal stability, absorbance, fluorescence, and optical nonlinearity. OHQ-CBS crystals maintained advantage of previously reported OHQ-T (2-(4-hydroxystyryl)-1-methylquinolinium 4-methylbenzenesulfonate) crystals such as thermal stability, high order parameter and large area of crystals. OHQ-CBS crystals exhibit strong SHG intensity more than OHQ-T crystals, which is indicating enhanced molecular nonlinearity. Accordingly, compared to OHQ-T crystals, OHQ-CBS crystals are highly red shift at absorbance, fluorecence in crystalline state. In order to discover differences of intermolecular interaction of OHQ-T crystals and OHQ-CBS crystals, we performed a hirshfeld analysis. Furthermore, we demonstrated co-crystallization of OHQ-T, OHQ-CBS crystals with different feeding ratio in solution. Physical property such as absorbance, photoluminescence, thermal stability, high frequency IR region was linearly changed by mole percentage of OHQ-T in crystal. It indicated that feeding ratio of counter anions in solution controlled physical property of co-crystals.
- Fulltext
- Appears in Collections:
- Graduate School of Ajou University > Department of Molecular Science and Technology > 3. Theses(Master)
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