Jump to main content
Jump to site search


DNP NMR spectroscopy of cross-linked organic polymers: rational guidelines towards optimal sample preparation

Author affiliations

Abstract

Cross-linked polystyrenes (PS) are an important class of polymers, whose properties are strongly dependent on incorporated functionalities, for which detailed understanding of their structure remains a challenge. Here, we develop a rational guideline for dynamic nuclear polarization (DNP) sample formulation for cross-linked PS to interrogate their structure. We show that the DNP enhancement on a series of cross-linked PS bearing alkylammonium groups as prototypical organic polymers correlates with the polymer swelling properties in both apolar and polar formulations (TEKPol/1,1,2,2-tetrachloroethane and AMUPol/dimethyl sulfoxide). This work provides guidelines to easily optimize DNP formulation using a simple swelling test and enables natural abundance 15N NMR to be recorded on a series of PS-supported quaternary alkylammonium salts, allowing a detailed structural analysis.

Graphical abstract: DNP NMR spectroscopy of cross-linked organic polymers: rational guidelines towards optimal sample preparation

Back to tab navigation

Supplementary files

Article information


Submitted
21 Sep 2019
Accepted
11 Dec 2019
First published
12 Dec 2019

Phys. Chem. Chem. Phys., 2020, Advance Article
Article type
Paper

DNP NMR spectroscopy of cross-linked organic polymers: rational guidelines towards optimal sample preparation

S. Tanaka, W. Liao, A. Ogawa, K. Sato and C. Copéret, Phys. Chem. Chem. Phys., 2020, Advance Article , DOI: 10.1039/C9CP05208A

Social activity

Search articles by author

Spotlight

Advertisements