NMR signal separation of ionic liquids by poly( sodium-p-styrenesulfonate)-assisted chromatographic NMR spectroscopy--Dedicated to Professor Xiuwen Han on the occasion of her 80th birthday  

作　　者：Kui Yan Zhengwu Bai Shaohua Huang 

机构地区：[1]Institute of Drug Discovery and Technology,Ningbo University,Ningbo,315211,China [2]School of Chemistry and Environmental Engineering,Wuhan Institute of Technology,Wuhan,430073,China [3]Qingdao Institute of Bioenergy and Bioprocess Technology,Chinese Academy of Sciences,Qingdao,266101,China

出　　处：《Magnetic Resonance Letters》2021年第2期153-159,共7页磁共振快报（英文）

基　　金：The work is supported by the National Natural Science Foundation of China(grant no.21105108);Key Technology Talent Program of Chinese Academy of Sciences(2015).

摘　　要：Diffusion-ordered nuclear magnetic resonance spectroscopy(DOSY),dubbed chromato-graphic NMR spectroscopy,can be used to simultaneously distinguish and identify the structures of components in a mixture according to their different diffusion coefficients.In order to improve the resolution of DOSY on the diffusion dimension,a lot of matrices have been developed to expand the application of this technique in mixture analysis.However,there is no matrix to detect the mixture of ionic liquids(ILs).Herein,we introduced a new matrix,poly(sodium-p-styrenesulfonate)(PSSNa),which can be used to fully separate the signals of a mixture of different ILs.The mixture of three imidazolium ILs of 1-butyl-3-methylimidazolium bromide,1-allyl-3-vinylimidazolium bromide and 1-arboxymethy-3-methylimidazolium chloride could be fully distinguished by virtue of their different interactions with PSSNa.We also investigated the influences of PSSNa amount,IL con-centration and solution pH value on the signal resolution of mixtures.This work provides a scientific reference for the analysis of the other IL analytes.

关 键 词：Nuclear magnetic resonance(NMR) DOSY Matrix poly(sodium-p-styrenesulfonate) Ionic liquid 

分 类 号：O62[理学—有机化学]