Induction of Thermotropic Bicontinuous Cubic Phases in Liquid-Crystalline Ammonium and Phosphonium Salts

2012 ◽  
Vol 134 (5) ◽  
pp. 2634-2643 ◽  
Author(s):  
Takahiro Ichikawa ◽  
Masafumi Yoshio ◽  
Atsushi Hamasaki ◽  
Satomi Taguchi ◽  
Feng Liu ◽  
...  
Keyword(s):  
Liquid Crystalline ◽  
Phosphonium Salts ◽  
Cubic Phases ◽  
Bicontinuous Cubic

scholarly journals Design of Ionic Liquid Crystals Forming Normal-Type Bicontinuous Cubic Phases with a 3D Continuous Ion Conductive Pathway

Crystals ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 309 ◽  
Author(s):  
Takahiro Ichikawa ◽  
Yui Sasaki ◽  
Tsubasa Kobayashi ◽  
Hikaru Oshiro ◽  
Ayaka Ono ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Liquid Crystals ◽  
Ionic Conductivity ◽  
Liquid Crystalline ◽  
Alkyl Chain ◽  
Normal Type ◽  
Ion Conduction ◽  
Cubic Phases ◽  
Bicontinuous Cubic ◽  
Chain Lengths

We have prepared a series of pyridinium-based gemini amphiphiles. They exhibit thermotropic liquid–crystalline behavior depending on their alkyl chain lengths and anion species. By adjusting the alkyl chain lengths and selecting suitable anions, we have obtained an ionic amphiphile that exhibits a normal-type bicontinuous cubic phase from 38 °C to 12 °C on cooling from an isotropic phase. In the bicontinuous cubic liquid–crystalline assembly, the pyridinium-based ionic parts align along a gyroid minimal surface forming a 3D continuous ionic domain while their ionophobic alkyl chains form 3D branched nanochannel networks. This ionic compound can form homogeneous mixtures with a lithium salt and the resultant mixtures keep the ability to form normal-type bicontinuous cubic phases. Ion conduction measurements have been performed for the mixtures on cooling. It has been revealed that the formation of the 3D branched ionophobic nanochannels does not disturb the ion conduction behavior in the ionic domain while it results in the conversion of the state of the mixtures from fluidic liquids to quasi-solids, namely highly viscous liquid crystals. Although the ionic conductivity of the mixtures is in the order of 10–7 S cm–1 at 40 °C, which is far lower than the values for practical use, the present material design has a potential to pave the way for developing advanced solid electrolytes consisting of two task-specific nanosegregated domains: One is an ionic liquid nano-domain with a 3D continuity for high ionic conductivity and the other is ionophobic nanochannel network domains for high mechanical strength.

Co-organisation of ionic liquids with amphiphilic diethanolamines: construction of 3D continuous ionic nanochannels through the induction of liquid–crystalline bicontinuous cubic phases

2012 ◽  
Vol 3 (6) ◽  
pp. 2001 ◽  
Author(s):  
Takahiro Ichikawa ◽  
Masafumi Yoshio ◽  
Satomi Taguchi ◽  
Junko Kagimoto ◽  
Hiroyuki Ohno ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Liquid Crystalline ◽  
Cubic Phases ◽  
Bicontinuous Cubic

Induction of bicontinuous cubic liquid-crystalline assemblies for polymerizable amphiphiles via tailor-made design of ionic liquids

2016 ◽  
Vol 52 (96) ◽  
pp. 13861-13864 ◽  
Author(s):  
Hiroaki Takeuchi ◽  
Takahiro Ichikawa ◽  
Masafumi Yoshio ◽  
Takashi Kato ◽  
Hiroyuki Ohno
Keyword(s):  
Ionic Liquids ◽  
Liquid Crystalline ◽  
The Self ◽  
Self Organization ◽  
Organization Behavior ◽  
Cubic Phases ◽  
Bicontinuous Cubic

The self-organization behavior of amphiphiles has been successfully tuned by the tailor-made design of ionic liquids so as to induce them to exhibit bicontinuous cubic phases.

Triply-periodic nanostructures in surfactant, block copolymer, and biomembrane systems, and simulation of TEMs

1993 ◽  
Vol 51 ◽  
pp. 884-885
Author(s):  
David M. Anderson ◽  
Tomas Landh
Keyword(s):  
Liquid Crystalline ◽  
Diblock Copolymers ◽  
Cubic Phase ◽  
List Type ◽  
Interpenetrating Networks ◽  
Triply Periodic ◽  
Wide Range ◽  
Bicontinuous Cubic ◽  
Phase Liquid ◽  
Dividing Surface

First discovered in surfactant-water liquid crystalline systems, so-called ‘bicontinuous cubic phases’ have the property that hydropnilic and lipophilic microdomains form interpenetrating networks conforming to cubic lattices on the scale of nanometers. Later these same structures were found in star diblock copolymers, where the simultaneous continuity of elastomeric and glassy domains gives rise to unique physical properties. Today it is well-established that the symmetry and topology of such a morphology are accurately described by one of several triply-periodic minimal surfaces, and that the interface between hydrophilic and hydrophobic, or immiscible polymer, domains is described by a triply-periodic surface of constant, nonzero mean curvature. One example of such a dividing surface is shown in figure 5.The study of these structures has become of increasing importance in the past five years for two reasons:1)Bicontinuous cubic phase liquid crystals are now being polymerized to create microporous materials with monodispersed pores and readily functionalizable porewalls; figure 3 shows a TEM from a polymerized surfactant / methylmethacrylate / water cubic phase; and2)Compelling evidence has been found that these same morphologies describe biomembrane systems in a wide range of cells.

scholarly journals Calculations of and Evidence for Chain Packing Stress in Inverse Lyotropic Bicontinuous Cubic Phases

Langmuir ◽  
2007 ◽  
Vol 23 (13) ◽  
pp. 7276-7285 ◽  
Author(s):  
Gemma C. Shearman ◽  
Bee J. Khoo ◽  
Mary-Lynn Motherwell ◽  
Kenneth A. Brakke ◽  
Oscar Ces ◽  
...  
Keyword(s):  
Chain Packing ◽  
Cubic Phases ◽  
Bicontinuous Cubic

scholarly journals Influence of a pH-sensitive polymer on the structure of monoolein cubosomes

Soft Matter ◽  
2017 ◽  
Vol 13 (41) ◽  
pp. 7571-7577 ◽  
Author(s):  
Monika Kluzek ◽  
Arwen I. I. Tyler ◽  
Shiqi Wang ◽  
Rongjun Chen ◽  
Carlos M. Marques ◽  
...  
Keyword(s):  
Ph Sensitive ◽  
Submicron Size ◽  
Cubic Phases ◽  
Bicontinuous Cubic ◽  
Ph Sensitive Polymer

Cubosomes consist in submicron size particles of lipid bicontinuous cubic phases stabilized by surfactant polymers.

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