A Comprehensive Study on Lyotropic Liquid–Crystalline Behavior of an Amphiphile in 20 Kinds of Amino Acid Ionic Liquids |
| |
| Authors: | Kanae Fujimura Dr Takahiro Ichikawa Dr Masafumi Yoshio Prof?Dr Takashi Kato Prof?Dr Hiroyuki Ohno |
| |
| Institution: | 1. Department of Biotechnology, Tokyo University of Agriculture and Technology, Nakacho, Koganei, Tokyo, Japan;2. Functional Ionic Liquid Laboratories (FILL), Nakacho, Koganei, Tokyo, Japan;3. Department of Chemistry and Biotechnology, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo, Japan;4. http://www.tuat.ac.jp/～ohno/index_e.html
0000-0001-9716-3495
Department of Biotechnology, Tokyo University of Agriculture and Technology, Nakacho, Koganei, Tokyo, Japan |
| |
| Abstract: | We examined the self‐organization behavior of a designed amphiphilic molecule in 20 kinds of amino acid ionic liquids composed of 1‐butyl‐3‐methylimidazolium cation and natural amino acid anion (C4mim]AA]). Addition of C4mim]AA], regardless of their anion species, to the amphiphile provided homogeneous mixtures showing lyotropic liquid–crystalline (LC) behavior. Upon increasing the component ratio of C4mim]AA] in the mixtures, a successive change of the mesophase patterns from inverted hexagonal columnar, in some case via bicontinuous cubic, to layered phases was observed. By examining the LC properties at various temperatures and component ratios, we constructed lyotropic LC phase diagrams. Interestingly, the appearance of these phase diagrams is greatly different according to the selection of AA]. Through comparison, we found that the self‐organization behavior of an amphiphile in ionic liquids can be tuned by controlling their ability to form hydrogen‐bond, van der Waals, and π‐π interactions. |
| |
| Keywords: | amino acid ionic liquids bicontinuous cubic phase ionic liquids lyotropic liquid crystal self-assembly |
|
|
