NMR evidence of hydrogen bonding in 1-ethyl-3-methylimidazolium-tetrafluoroborate room temperature ionic liquid

Jing Fang Huang, Po Yu Chen, I. Wen Sun, S. P. Wang

研究成果: Article同行評審

161 引文 斯高帕斯(Scopus)

摘要

The 1-ethyl-3-methylimidazolium-tetrafluoroborate (EMI-BF4) room temperature ionic liquid was investigated with NMR techniques. Diffusion coefficients measured at temperatures ranging from 300 to 360 K indicate that phase-change occurred in the vicinity of 333 K, which is supported by 11B quadrupolar relaxation rates. This phase change is ascribed to the transformation of the diffusion particle from 'discrete ion-pair' to 'individual ion' at temperatures above 335 K due to decomposition of the EMI-BF4 ion pair. Analysis of the 13C dipole-dipole relaxation rates identifies the formation of hydrogen bond (C2H···F) between the counterions, EMI+ and BF4-. This hydrogen bonding may have significant contribution to the higher viscosity of this ionic liquid in comparison with the EMI-AlCl4 ionic liquid at corresponding temperatures.

原文English
頁(從 - 到)7-11
頁數5
期刊Inorganica Chimica Acta
320
發行號1-2
DOIs
出版狀態Published - 2001 八月 13

All Science Journal Classification (ASJC) codes

  • 物理與理論化學
  • 無機化學
  • 材料化學

指紋

深入研究「NMR evidence of hydrogen bonding in 1-ethyl-3-methylimidazolium-tetrafluoroborate room temperature ionic liquid」主題。共同形成了獨特的指紋。

引用此