2D experiments for the characterization of fluorinated polymers:: pulsed-field gradients 1H-19F hetero-COSY and its selective version

In this paper, we demonstrate the utility of H-1-F-19 chemical shift correlation 2D NMR experiments for the characterization of fluorinated compounds. H-1-F-19 hetero-COSY provides much more information compared to the used H-1-F-19 HMQC and HMBC experiments. We performed H-1-F-19 hetero-COSY experiment and its selective version, both with pulsed field gradients, to obtain resonance assignments for the characterization of fluoromolecules. These experiments are illustrated by spectra of C2F5(VDF)(2)I, used here as a model compound, and spectra of the fluorinated terpolymer XC2000S containing vinylidenefluoride (VDF), tetrafluoroethylene (TFE) and allyloxypropandiol (AOPD). (C) 2000 Elsevier Science S.A, All rights reserved.