Design of 3D continuous proton conduction pathway by controlling co-organization behavior of gemini amphiphilic zwitterions and acids

Ono, Ayaka; Ohno, Hiroyuki; Kato, Takashi; Ichikawa, Takahiro

doi:10.1016/j.ssi.2018.01.004

Cited by 10 publications

(11 citation statements)

References 54 publications

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“…One of the reasons that we focus on the gemini design is that there have been a relatively large number of reports on gemini-type amphiphiles exhibiting lyotropic Cub bi phases in the presence of water [26][27][28][29]. Moreover, just recently, we have succeeded in developing gemini-type ionic amphiphiles exhibiting thermotropic Cub bi phases [30,31]. Based on the molecular design in these previous studies, we have designed a series of gemini-type ionic amphiphiles, 1-4, with various alkyl chain lengths and anion species (Figure 1b).…”

Section: Resultsmentioning

confidence: 99%

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

et al. 2019

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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.

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Section: Resultsmentioning

confidence: 99%

“…As a cation part, a pyridinium cation has been employed since there have been several reports on the exhibition of Cub bi phases for pyridinium-based amphiphiles [33][34][35][36][37]. As a linker, we have selected a hexyl chain according to several researches on gemini-type amphiphiles [26][27][28][29][30][31].…”

Section: Resultsmentioning

confidence: 99%

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

et al. 2019

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“…Several groups have also recently reported proton conduction using an organized structure with thermotropic and lyotropic LC properties [104][105][106][107][108][109][110]. Ohno and co-workers reported anisotropic proton conduction by a self-assembled lyotropic columnar structure using phosphonium-type zwitterions and bis-(trifluoromethanesulfonyl)imide [111].…”

Section: Other Recent Organized Films With Proton-conductive Channelsmentioning

confidence: 99%

Progress on highly proton-conductive polymer thin films with organized structure and molecularly oriented structure

Nagao

2020

Science and Technology of Advanced Materials

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Several current topics are introduced in this review, with particular attention to highly protonconductive polymer thin films with organized structure and molecularly oriented structure. Organized structure and molecularly oriented structure are anticipated as more promising approaches than conventional less-molecular-ordered structure to elucidate mechanisms of high proton conduction and control proton conduction. This review introduces related polymer materials and molecular design using lyotropic liquid crystals and hydrogen bond networks for high proton conduction. It also outlines the use of substrate surfaces and external fields, such as pressure and centrifugal force, for organizing structures and molecularly oriented structures.

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“…2a, inset), which is also indicative of the formation of the Cub bi nanostructure. Based on the insights into the molecular assemblies of the previously designed amphiphilic LC zwitterions,12,40–43 it is most plausible to assume that the sulfonic acid groups of Diene-GZI align regularly on the gyroid minimal surface.…”

Section: Resultsmentioning

confidence: 99%

“…There has been recent progress on our original molecular design principle for creating Cub bi liquid crystals. In a representative system, we have employed amphiphilic zwitterions consisting of an organic cation and a sulfonate anion 12,40–43. Owing to the ability of zwitterions to form adducts with suitably selected acids, it is possible to tune their self-organization behavior in order to form Ia 3[combining macron] d -type (gyroid-type) Cub bi liquid-crystalline (LC) assemblies by controlling the addition of acids.…”

Section: Introductionmentioning

confidence: 99%

Gyroid structured aqua-sheets with sub-nanometer thickness enabling 3D fast proton relay conduction

Kobayashi

Ono

et al. 2019

Chem. Sci.

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Design of 3D continuous proton conduction pathway by controlling co-organization behavior of gemini amphiphilic zwitterions and acids

Cited by 10 publications

References 54 publications

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

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

Progress on highly proton-conductive polymer thin films with organized structure and molecularly oriented structure

Gyroid structured aqua-sheets with sub-nanometer thickness enabling 3D fast proton relay conduction

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