2023 Fiscal Year Final Research Report
Preparation and Characterization of Hydrogen-Bonded Ionic Liquid Crystals with Dimeric Ionic Liquids and Polyols
| Project/Area Number |
20K05655
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Multi-year Fund |
|---|
| Section | 一般 |
|---|
| Review Section |
Basic Section 35030:Organic functional materials-related
|
|---|
| Research Institution | Ritsumeikan University |
|---|
Principal Investigator |
|
|---|
| Project Period (FY) |
2020-04-01 – 2024-03-31
|
| Keywords | イオン液体 / 第4級アンモニウム塩型 / ダイマー型 / 溶媒添加効果 / 液晶性 / 水素結合 |
|---|
| Outline of Final Research Achievements |
The main purpose of this research is to obtain the hydrogen-bonded ionic liquid crystals complexes by adding polyols. The objective dimer-type ionic liquid compounds are originally designed, and seven compounds of which structure is partially modified have been synthesized and various investigations were carried out on the systems in which the dimer ionic liquids were mixed with polyols such as ethylene glycol. The results showed that the complexes showed a liquid crystalline phase, whereas the ionic liquid compounds without polyols did not show a liquid crystalline phase and the molecules of ionic liquid compounds have no rigid part which is commonly needed to show liquid crystallinity. Furthermore, the structure of this liquid crystalline phase was determined from the results of X-ray diffraction experiments, etc., and the position of the solvent molecules in the liquid crystalline phase was also successfully identified in this study.
|
| Free Research Field |
有機材料化学
|
| Academic Significance and Societal Importance of the Research Achievements |
本研究で得られた水素結合型イオン液晶複合体は，液晶相発現に必要な剛直部位を持たずに液晶相を発現し，イオン伝導性も示した．これは芳香環を含まないため，電極近傍での分解が起きにくく，液晶性を持つゆえに，イオン伝導性に方向性を持つ新たな電解質材料と成り得る．さらに同様の分子設計でキラリティーの導入ができれば，キラル反応場としてキラル化合物の合成等への応用も可能である．また，研究過程で得られたダイマー型イオン液体と多価アルコールとの混合系における液晶構造，さらに多価アルコールの種類やカウンターアニオンの種類と，液晶性やイオン伝導性等との相関に関する知見は今後の同分野における分子設計の指針と成り得る．
|
