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Int. J. Mol. Sci. 2014, 15(11), 21080-21089;

Boric Ester-Type Molten Salt via Dehydrocoupling Reaction

School of Materials Science, Japan Advanced Institute of Science and Technology (JAIST), 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan
Advanced Materials Laboratory, Nissan Motor Co., Ltd., 1 Natsushima-cho, Yokosuka-shi, Kanagawa 237-8523, Japan
Author to whom correspondence should be addressed.
Received: 17 September 2014 / Revised: 5 November 2014 / Accepted: 6 November 2014 / Published: 14 November 2014
(This article belongs to the Special Issue Green Chemistry and the Biorefinery)
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Novel boric ester-type molten salt was prepared using 1-(2-hydroxyethyl)-3-methylimidazolium chloride as a key starting material. After an ion exchange reaction of 1-(2-hydroxyethyl)-3-methylimidazolium chloride with lithium (bis-(trifluoromethanesulfonyl) imide) (LiNTf2), the resulting 1-(2-hydroxyethyl)-3-methylimidazolium NTf2 was reacted with 9-borabicyclo[3.3.1]nonane (9-BBN) to give the desired boric ester-type molten salt in a moderate yield. The structure of the boric ester-type molten salt was supported by 1H-, 13C-, 11B- and 19F-NMR spectra. In the presence of two different kinds of lithium salts, the matrices showed an ionic conductivity in the range of 1.1 × 10−4–1.6 × 10−5 S cm−1 at 51 °C. This was higher than other organoboron molten salts ever reported. View Full-Text
Keywords: molten salts; lithium ion; organoboron compounds; lithium transference number molten salts; lithium ion; organoboron compounds; lithium transference number

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Matsumi, N.; Toyota, Y.; Joshi, P.; Puneet, P.; Vedarajan, R.; Takekawa, T. Boric Ester-Type Molten Salt via Dehydrocoupling Reaction. Int. J. Mol. Sci. 2014, 15, 21080-21089.

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