Boric Ester-Type Molten Salt via Dehydrocoupling Reaction

International Journal of Molecular Sciences

Noriyoshi Matsumi²  Yoshiyuki Toyota²  Prerna Joshi²  Puhup Puneet²  Raman Vedarajan²  Toshihiro Takekawa¹ 

[1] Advanced Materials Laboratory, Nissan Motor Co., Ltd., 1 Natsushima-cho, Yokosuka-shi, Kanagawa 237-8523, Japan; E-Mail:;School of Materials Science, Japan Advanced Institute of Science and Technology (JAIST), 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan; E-Mails:

关键词: molten salts;    lithium ion;    organoboron compounds;    lithium transference number;   

DOI  :  10.3390/ijms151121080

来源: mdpi

【 摘 要 】

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.

【 授权许可】

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© 2014 by the authors; licensee MDPI, Basel, Switzerland.