Liquid-Crystalline Ion-Conductive Materials:  Self-Organization Behavior and Ion-Transporting Properties of Mesogenic Dimers Containing Oxyethylene Moieties Complexed with Metal Salts

Ohtake, Toshihiro; Takamitsu, Yasuyuki; Ito-Akita, Kaori; Kanie, Kiyoshi; Yoshizawa, Masahiro; Mukai, Tomohiro; Ohno, Hiroyuki; Kato, Takashi

doi:10.1021/ma000878a

Cited by 47 publications

(46 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…[261][262][263][264][265][266] Such nano-segregation of smectic materials was facilitated by the introduction of perfluoroalkyl chains into the rod moieties (72 b). [267] In these cases the three components (the perfluorocarbons, aromatic mesogens, and PEO moieties) formed triply layered nanostructures leading to higher ion conduction.…”

Section: D Conductionmentioning

confidence: 99%

Functional Liquid‐Crystalline Assemblies: Self‐Organized Soft Materials

2005

Self Cite

View full text Add to dashboard Cite

In the 21st century, soft materials will become more important as functional materials because of their dynamic nature. Although soft materials are not as highly durable as hard materials, such as metals, ceramics, and engineering plastics, they can respond well to stimuli and the environment. The introduction of order into soft materials induces new dynamic functions. Liquid crystals are ordered soft materials consisting of self-organized molecules and can potentially be used as new functional materials for electron, ion, or molecular transporting, sensory, catalytic, optical, and bio-active materials. For this functionalization, unconventional materials design is required. Herein, we describe new approaches to the functionalization of liquid crystals and show how the design of liquid crystals formed by supramolecular assembly and nano-segregation leads to the formation of a variety of new self-organized functional materials.

show abstract

Section: D Conductionmentioning

confidence: 99%

Functional Liquid‐Crystalline Assemblies: Self‐Organized Soft Materials

2005

Self Cite

View full text Add to dashboard Cite

show abstract

“…We have been collaborating with Prof. Takashi Kato of The University of Tokyo to prepare dimensionally controlled ionic liquids for anisotropic ion conduction. [82][83][84][85][86][87][88][89][90][91][92][93][94][95][96][97][98] A review on this subject has been published elsewhere. 99 One of the biggest requirements on the ionic liquids is the preparation of films having similar characteristics to ionic liquids.…”

Section: Polymerization Of Ionic Liquidsmentioning

confidence: 99%

Functional Design of Ionic Liquids

Ohno

2006

Bulletin of the Chemical Society of Japan

Self Cite

249

158

View full text Add to dashboard Cite

Ionic liquids, molten salts at temperatures lower than 100 C, preferably below room temperature, are unique liquids having very different characteristics from ordinary molecular liquids. Since these ionic liquids are prepared by coupling relatively large organic ions, there are many chances to create novel functionalities by changing structure of component ions. To develop such novel and functional ionic liquids, we first developed a facile preparation method, i.e., neutralization of tertiary amines with organic acids. By this convenient method, we prepared hundreds of salts having low melting points. We, then, tried to prepare ionic salts containing small ions such as lithium cation, proton, or chloride anion. Because small ions received stronger electrostatic force due to higher surface charge density, which results in the formation of salts with higher melting points, case must be taken. Ionic liquids containing halogen-free salts are another interesting subject to challenge from the viewpoint of environmentally friendly materials. Heteroaromatic rings such as azolates gave excellent ionic liquids having very low viscosity by coupling with suitable cations. Amino acids have also been used as anions to prepare salts with low melting points or amorphous glasses. They are helpful to analyze the relationship between ion structure and characteristics of the salts. Zwitterions, in which both cation and anion were tethered with a covalent bond, were prepared to function as ionic liquids. These ions should not migrate under a potential gradient and should be an excellent ion conductive matrix for added ions. Tethering of ions caused the T m to be high, and the zwitterions with melting points around room temperature have not been synthesized yet. However, lots of solid zwitterions became liquids by adding suitable solid salts or acid such as lithium bis(trifluoromethanesulfonyl)imide. In this mixture, lithium cations had a transport number higher than 0.5, meaning that the lithium cations are the major mobile ions in the mixture. Some of the functionality is achieved by dimension control, such as polymerization of ions, and so on. Other functional modifications and design of ionic liquids are also mentioned.

show abstract

“…[261][262][263][264][265][266] Eine derartige Nanophasentrennung von smektischen Verbindungen war mit der Einführung von Perfluoralkylketten in den Stabresten beabsichtigt (72 b). [267] In diesen Fällen bilden die drei Komponenten (Perfluoralkylreste, aromatische Mesogene und PEO-Reste) dreifache Nanoschichtstrukturen mit hohen Ionenleitfähigkeiten.…”

Section: Zweidimensionale Leiterunclassified

Funktionelle flüssigkristalline Aggregate: selbstorganisierte weiche Materialien

2005

Self Cite

View full text Add to dashboard Cite

Dynamische weiche Materialien werden im 21. Jahrhundert an Bedeutung gewinnen. Zwar sind diese Funktionsmaterialien nicht so beständig wie Metalle, Keramiken oder Plastik, dafür reagieren sie aber gut auf externe Reize. Geordnete weiche Materialien können dynamische Funktionen erfüllen. Flüssigkristalle aus selbstorganisierten Molekülen sind ein Beispiel hierfür: Sie eignen sich möglicherweise zum Elektronen‐, Ionen‐ oder Stofftransport sowie als sensorisch, katalytisch, optisch oder biologisch aktive Materialien. Um diese Funktionen auszuschöpfen, benötigt man unkonventionelle Materialentwürfe. Hier beschreiben wir aktuelle Ansätze zur Funktionalisierung von Flüssigkristallen und zeigen, wie das Design von Flüssigkristallen durch supramolekulare Aggregation und Nanophasentrennung zu einer Vielfalt selbstorganisierter Funktionsmaterialien führt.

show abstract

Liquid-Crystalline Ion-Conductive Materials: Self-Organization Behavior and Ion-Transporting Properties of Mesogenic Dimers Containing Oxyethylene Moieties Complexed with Metal Salts

Cited by 47 publications

References 17 publications

Functional Liquid‐Crystalline Assemblies: Self‐Organized Soft Materials

Functional Liquid‐Crystalline Assemblies: Self‐Organized Soft Materials

Functional Design of Ionic Liquids

Funktionelle flüssigkristalline Aggregate: selbstorganisierte weiche Materialien

Contact Info

Product

Resources

About