Molten salts bearing anion receptor

Matsumi, Noriyoshi; Miyake, Masafumi; Ohno, Hiroyuki

doi:10.1039/b408839e

Cited by 28 publications

(15 citation statements)

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“…The anion trapping of boron atom worked much efficiently in IL matrix than was observed in polyether systems. 30 Incorporation of several highly dissociable organoborate lithium salt structures into electrolyte matrix was particularly found to be effective to improve ionic conductivity. 28,29,[31][32][33][34][35] For instance, a zwitterionic molten salt 32 bearing lithium pentafluorophenylborate structure showed very high ionic conductivity as a zwitterionic molten salt.…”

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confidence: 99%

Enhanced Ionic Conduction in Organoboron Ion Gels Facilely Designed via Condensation of Cellulose with Boric Acids in Ionic Liquids

et al. 2009

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Novel ion-gels bearing lithium borate were synthesized via condensation between cellulose and boric acids in IL. Ion-gels obtained showed high ionic conductivity comparable to IL itself. First, ion-gels containing 5 wt % and 7 wt % of cellulose were prepared in 1-allyl-3-ethylimidazolium chloride. Their ionic conductivities were evaluated by ac-impedance method after drying ion-gels thoroughly. The ion-gel including 5 wt % of cellulose exhibited higher conductivity than that including 7 wt % of cellulose. This should be because of lower activating energy under lower composition of cellulose. The effect of concentration of C 6 F 5 B(OH) 2 on ionic conductivity was also examined with varying the ratio of B(OH) 3 and C 6 F 5 B(OH) 2 . It was demonstrated that the ion-gel including greater amount of pentafluorophenylborate showed significantly enhanced ionic conductivity. Preparation of ion-gels including 1-allyl-3-ethylimidazolium formate was also examined at the cellulose concentration of 7 wt %. The ion-gels synthesized in 1-allyl-3-ethylimidazolium formate showed higher ionic conductivity (1:98 Â 10 À3 Scm À1 ; 30 C) than that synthesized in 1-allyl-3-ethylimidazolium chloride. This should be because of lower viscosity of 1-allyl-3-ethylimidazolium formate.KEY WORDS: Ion-gels / Cellulose / Boric Esters / Ionic Conduction / Ionic Liquids / After ionic liquids (ILs) 1-3 emerged as a new class of electrolytes showing unusually high ionic conductivity, ILs had become one of the most frequently employed ion conductive matrix in an amazingly short period. Expectation toward ILs as electrolyte for lithium secondary battery or fuel cell had also rapidly spread worldwide. These days, there is urgent social demanding for improvement in safety of energy storage devices. Non flammable ILs are expected to be one of key materials for the solution of such problem. To explore novel ILs showing desirable properties such as low viscosity, high electrochemical stability and selectivity of target cation transport, versatile types of ILs have been developed so far. Moreover, in view of application for energy storage devices, polymerized ILs and polymer gel electrolytes including ILs (ion gels) have also been earnestly studied. [4][5][6][7][8][9][10][11][12][13][14][15] In the present work, cellulose was employed as a supporting polymer of ion gels.In the case of poly(ethylene oxide), it is known that addition of cellulose leads to improved mechanical properties and higher ionic conductivity of the resulting matrix.16 Since chloride type ILs are known as good solvent of cellulose, [17][18][19] preparation of IL based ion gels including cellulose appears to be a promising approach to obtain dimensionally stable and highly ion conductive ion gels.In addition, it is widely known that poly(saccharide)s possess high reactivity toward boric acids. [20][21][22] As an approach to improve the selectivity of target cation transport in electrolytes or enhance ionic conductivity of matrix, incorporation of organoboron units such as boric ester, ...

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Enhanced Ionic Conduction in Organoboron Ion Gels Facilely Designed via Condensation of Cellulose with Boric Acids in Ionic Liquids

et al. 2009

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“…The information in the literature provides a record on the investigations conducted on hydroboration reactions of these complexes, as well as their feature of being excellent intermediates for a wide variety of synthetic applications, among which is synthesis of dialkylboranes and their derivatives [12][13][14], synthesis of nido-B 11 H 14 anion [15], synthesis of alkyldihaloboranes [16] and synthesis of silyl substituted organoboranes [17]. The usefulness of these haloborane addition complexes have also been utilized in synthesis of ionic liquids [18], in the chemistry of ring opening [19], as well as in polymerisation through hydroboration [20,21].…”

Section: Introductionmentioning

confidence: 99%

Change in mechanistic pathway of hydroboration: A detailed kinetic study of H2BBr·SMe2 and HBBr2·SMe2

Xaba

Jaganyi

2007

Journal of Organometallic Chemistry

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“…To improve the selectivity of target cation transport, imidazolium type molten salts bearing organoboron anion receptor [5] were prepared via hydroboration of 1-allylimidazolium type molten salts. This strategy was extended to design of organoboron solid polymer electrolytes [6] and organoborate type zwitterionic molten salt [7].…”

Section: Introductionmentioning

confidence: 99%

Preparation of ionic liquids bearing o-carborane anion via N,N′-dialkylimidazol-2-ylidene carbene

Matsumi

Miyamoto

Aoi

2009

Journal of Organometallic Chemistry

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Molten salts bearing anion receptor

Cited by 28 publications

References 15 publications

Enhanced Ionic Conduction in Organoboron Ion Gels Facilely Designed via Condensation of Cellulose with Boric Acids in Ionic Liquids

Enhanced Ionic Conduction in Organoboron Ion Gels Facilely Designed via Condensation of Cellulose with Boric Acids in Ionic Liquids

Change in mechanistic pathway of hydroboration: A detailed kinetic study of H2BBr·SMe2 and HBBr2·SMe2

Preparation of ionic liquids bearing o-carborane anion via N,N′-dialkylimidazol-2-ylidene carbene

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