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Int. J. Mol. Sci. 2014, 15(11), 21080-21089; doi:10.3390/ijms151121080

Boric Ester-Type Molten Salt via Dehydrocoupling Reaction

1
School of Materials Science, Japan Advanced Institute of Science and Technology (JAIST), 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan
2
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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Abstract

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
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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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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