클로로벤젠 설포네이트 음이온에 기반을 둔 비선형 광학 퀴놀리니움 결정
- 주제(키워드) Chlorobenzenesulfonate , Crystals , Co-crystals
- 발행기관 아주대학교
- 지도교수 권오필
- 발행년도 2017
- 학위수여년월 2017. 2
- 학위명 석사
- 학과 및 전공 일반대학원 분자과학기술학과
- 실제URI http://www.dcollection.net/handler/ajou/000000024100
- 본문언어 영어
- 저작권 아주대학교 논문은 저작권에 의해 보호받습니다.
초록/요약
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.
more목차
Ι. Introduction 1
II. Experiments 5
II.1. Chemical Structures 5
II.2. Synthesis 6
II.2.1. Materials 6
II.2.2. Synthesis of OHQ-CBS 7
II.3. General Characterization 8
II.3.1. 1H-NMR Analysis 8
II.3.1.1. 1H-NMR Analysis of Intermediate 8
II.3.1.2. 1H-NMR Analysis of Chromophore 10
III. Results and Discussion 12
III.1. Thermal Analysis 12
III.2. Optical Properties 14
III.2.1 UV-vis Absorption, FL Spectra 14
III.3. Second Harmonic Generation (SHG) Test 17
III.4. Crystal Growth and Structure Analysis 18
III.5. Growth of OHQ-CBS, OHQ-T Co-crystals 27
III.6. 1H-NMR Analysis of OHQ-CBS, OHQ-T Co-crystals 29
III.7. XRD Analysis of OHQ-CBS, OHQ-T Co-crystals 30
III.8. Thermal Analysis of OHQ-CBS, OHQ-T Co-crystals 32
III.9. Photophysical Property of OHQ-CBS, OHQ-T Co-crystals 33
III.10. IR spectroscopy in THz region of OHQ-CBS, OHQ-T Co-crystals 34
IV. Conclusions 35
V. References 36
