title: A Comprehensive Study on Lyotropic Liquid-Crystalline Behavior of an Amphiphile in 20 Kinds of Amino Acid Ionic Liquids.
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.
authors.affiliation: Department of Biotechnology, Tokyo University of Agriculture and Technology, Nakacho, Koganei, Tokyo, 184-8588, Japan.|Functional Ionic Liquid Laboratories (FILL), Nakacho, Koganei, Tokyo, 184-8588, Japan.
authors.forename: Kanae
authors.initials: K
authors.lastname: Fujimura
authors.affiliation: Department of Biotechnology, Tokyo University of Agriculture and Technology, Nakacho, Koganei, Tokyo, 184-8588, Japan. t-ichi@cc.tuat.ac.jp.|Functional Ionic Liquid Laboratories (FILL), Nakacho, Koganei, Tokyo, 184-8588, Japan. t-ichi@cc.tuat.ac.jp.
authors.forename: Takahiro
authors.identifier: http://orcid.org/0000-0002-4193-5457
authors.initials: T
authors.lastname: Ichikawa
authors.affiliation: Department of Chemistry and Biotechnology, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan.
authors.forename: Masafumi
authors.initials: M
authors.lastname: Yoshio
authors.affiliation: Department of Chemistry and Biotechnology, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan.
authors.forename: Takashi
authors.initials: T
authors.lastname: Kato
authors.affiliation: Department of Biotechnology, Tokyo University of Agriculture and Technology, Nakacho, Koganei, Tokyo, 184-8588, Japan. ohnoh@cc.tuat.ac.jp.|Functional Ionic Liquid Laboratories (FILL), Nakacho, Koganei, Tokyo, 184-8588, Japan. ohnoh@cc.tuat.ac.jp.
authors.forename: Hiroyuki
authors.identifier: http://orcid.org/0000-0001-9716-3495
authors.initials: H
authors.lastname: Ohno
mesh_terms: D000596:Amino Acids / Q000737:chemistry*; D007093:Imidazoles / Q000737:chemistry*; D052578:Ionic Liquids / Q000737:chemistry*; D050866:Liquid Crystals / Q000737:chemistry*; D044367:Phase Transition; D013501:Surface-Active Agents / Q000737:chemistry*
chemical_list: C525963:1-butyl-3-methylimidazolium; D000596:Amino Acids; D007093:Imidazoles; D052578:Ionic Liquids; D013501:Surface-Active Agents
keywords: amino acid ionic liquids; bicontinuous cubic phase; ionic liquids; lyotropic liquid crystal; self-assembly