title: Induction of an Infinite Periodic Minimal Surface by Endowing An Amphiphilic Zwitterion with Halogen-Bond Ability.
abstract: We have designed an amphiphilic zwitterion with an iodine-substituted imidazolium cation. Although it forms a layered assembly with flat interfaces, the addition of an equimolar amount of bis(trifluoromethane)sulfonimide results in the formation of a bicontinuous cubic liquid-crystalline assembly with a primitive-type infinite periodic minimal surface, where its zwitterionic headgroup sits regularly. IR measurements revealed that halogen bond between the iodine atoms on the imidazolium cation and the anions is involved in its molecular-assembly behavior. The present results clearly indicate the potential utility of halogen bonding to control the dimensionality and continuity of the ionic/nonionic interface of amphiphiles in bulk and consequent mesophase patterns, which may be a significant new molecular technology for precisely arranging functional molecules on a 3D continuous interfaces.
authors: Department of Biotechnology Tokyo University of Agriculture and Technology Nakacho, Koganei Tokyo184-8588 Japan; PRESTO The Japan Science and Technology Agency (JST) 4-1-8 Honcho Kawaguchi 332-0012 Japan.
authors: Takahiro
authors: 0000-0002-4193-5457
authors: T
authors: Ichikawa
authors: Department of Biotechnology Tokyo University of Agriculture and Technology Nakacho, Koganei Tokyo 184-8588 Japan.
authors: Akiyoshi
authors: A
authors: Okafuji
authors: Department of Chemistry and Biotechnology The University of Tokyo Hongo, Bunkyo-ku Tokyo 113-8656 Japan.
authors: Takashi
authors: T
authors: Kato
authors: Department of Biotechnology Tokyo University of Agriculture and Technology Nakacho, Koganei Tokyo 184-8588 Japan.
authors: Hiroyuki
authors: 0000-0001-9716-3495
authors: H
authors: Ohno
keywords: bicontinuous cubic phase; halogen bonds; infinite periodic minimal surface; liquid crystals; zwitterions