NMR oligomer resolution by intramolecular complexation in a poly(ethylene glycol) with an electron-acceptor end group

被引：6

作者：

Cojocariu, G ^{[1
]}

Natansohn, A ^{[1
]}

机构：

[1] Queens Univ, Dept Chem, Kingston, ON K7L 3N6, Canada

来源：

MACROMOLECULES | 2001年 / 34卷 / 12期

关键词：

Charge transfer - Gel permeation chromatography - Hydration - Hydrogen bonds - Molecular weight distribution - Nuclear magnetic resonance spectroscopy - Oligomers - Optical resolving power - Refractive index - Solutions;

D O I：

10.1021/ma010164f

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Intramolecular charge transfer interaction (CT) in a poly(ethylene glycol) (PEG) with an electron-acceptor end group was investigated. The CT complexes were observed to behave like a chemical shift reagent for PEG of different molecular weights. It was reported that the CT complexation allowed the nuclear magnetic resonance (NMR) resolution of the molecular weight distributions in aqueous solutions at high concentrations. It was shown that the lower limit of the concentration range was imposed by phase separation while the upper limit was based on the viscosity of the solution.

引用

页码：3827 / 3829

页数：3

共 8 条

[1] PARA-CHLORANIL AND PARA-FLUORANIL COMPLEXES OF CERTAIN MONOOXYGENATED AND POLYOXYGENATED ETHERS AND ETHER AROMATIC DONORS [J].