文档介绍：
核磁方法研究树枝形分子与离子液体的相
互作用#
赵黎博,徐铜文**
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(中国科学技术大学化学与材料科学学院功能膜研究室,合肥 230026)
摘要:通过以脉冲梯度场核磁共振技术(PGSE-NMR)方法及二维 NOE 实验为主的核磁共
振方法,以带表面负电的树枝形分子作为主体分子,离子液体[BMIM][MDEGSO4]和
[BMIM][TFSI]作为客体分子模型研究树枝形分子与离子液体的相互作用。结果表明,二者
之间只有静电相互作用而没有疏水作用,且二者之间的相互作用与以往研究的树枝形分子与
表面活性剂和药物之间的相互作用存在很大差别。提出了一种结合 PGSE-NMR 与 NOE 两
种方法以研究主客体系统的新方法。
关键词:树枝形分子;离子液体;核磁共振技术;主客体系统
中图分类号:O631
Interactions between dendrimer and Ionic Liquids revealed
by NMR Studies
ZHAO Libo, XU Tongwen
(School of Chemistry and Material Science, University of Science and Technology of China,
Hefei 230026, . China)
Abstract: The host−guest interactions of anionic poly(amidoamine) (PAMAM) dendrimer
with two ionic liquids including 1-butyl-3-methylimidazolium 2-(2-methoxyethoxy)ethyl sulfate
([BMIM][MDEGSO4]) and 1-butyl-3-methylimidazolium bis-(trifluoromethylsulfonyl)imide
([BMIM][TFSI]) were investigated by several NMR techniques such as 1H and 19F NMR, pulsed
field gradient (PFG) NMR, and 2D nuclear Overhauser enhancement spectroscopy (NOESY).
Anionic PAMAM dendrimer interacts with the ionic liquids via ionic interactions. Besides, no
inclusion formation between PAMAM dendrimer and the ionic liquids is observed on the basis of
NOE NMR studies. The interactions between dendrimer and ionic liquids are very different from
those between dendrimers and surfactants or amphiphilic dr