Premium
Triple‐Channel Solid‐State NMR Investigation of Poly(vinylidene fluoride) Polymorphs
Author(s) -
Holstein Peter,
Scheler Ulrich,
Harris Robin K.
Publication year - 1997
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/(sici)1097-458x(199709)35:9<647::aid-omr145>3.0.co;2-o
Subject(s) - chemistry , fluorine 19 nmr , polarization (electrochemistry) , solid state nuclear magnetic resonance , magic angle spinning , nuclear magnetic resonance spectroscopy , fluorine , fluoride , polar , carbon 13 nmr , analytical chemistry (journal) , crystallography , nuclear magnetic resonance , stereochemistry , organic chemistry , inorganic chemistry , physics , astronomy
Triple‐channel solid‐state NMR investigations of two different poly(vinylidene fluoride) (PVDF) materials are described. Carbon‐13 cross‐polarization magic angle spinning NMR spectra were recorded using simultaneous high‐power decoupling on both the proton and fluorine channels. Both 1 H to 13 C and 19 F to 13 C cross‐polarization experiments were applied, giving identical results apart from intensity variations due to the cross‐polarization efficiency. An attempt was made to characterize the polymorphism of PVDF by means of solid‐state triple‐resonance spectroscopy. Two principal signals, for the CF 2 and the CH 2 groups, were observed, for both the non‐polar α‐phase and the polar β‐phase. There was a small difference ( ca . 4 ppm) in the chemical shift positions for these distinct crystalline modifications. © 1997 by John Wiley & Sons, Ltd.