波谱学杂志2017，Vol.34Issue(2)：156-163,8.DOI:10.11938/cjmr20170204
离子液体热分解机理的原位变温多核核磁共振研究
In Situ Variable-Temperature Multi-Nuclear NMR Studies of the Thermal Decomposition Mechanism of Ionic Liquid
摘要
Abstract
In situ variable-temperature 1H,19F and 31P NMR spectroscopy was employed to study the thermal decomposition mechanisms of ionic liquid. At a temperature as low as 80℃, ionic liquid [C4mim][PF6], composed of 1-butyl-3-methylimidazolium cation (C4mim+) and hexafluorophosphate anion (PF6—), had a slow, but detectable decomposition. For dehydrated [C4mim][PF6], the ionic liquid started to decompose at temperature higher than 80℃. Small amount of PF5 and HF formed first. The proton in HF came from the proton at 2-position of 1-butyl-3-methylimidazolium cation ring. After losing the proton, a carbene structure was formed, which then formed complex with PF5. Free PF5 and PF5/carbene complex reached equilibrium at a ratio of 7:3.关键词
原位变温多核核磁共振/离子液体/热分解机理Key words
in situ variable-temperature multi-nuclear NMR/ionic liquid/thermal decomposition mechanism分类
数理科学引用本文复制引用
李森,郑俊鹏,郭鸣明..离子液体热分解机理的原位变温多核核磁共振研究[J].波谱学杂志,2017,34(2):156-163,8.基金项目
中国石化基础性前瞻性研究资助项目(14-16ZS0402). （14-16ZS0402）
