2D P-31 EXCHANGE NMR - A NEW APPROACH FOR A DIRECT PROBING OF THE CONNECTIVITIES OF Q(N) UNITS IN GLASSES

Authors
BORN R FEIKE M JAGER C SPIESS HW
Citation
R. Born et al., 2D P-31 EXCHANGE NMR - A NEW APPROACH FOR A DIRECT PROBING OF THE CONNECTIVITIES OF Q(N) UNITS IN GLASSES, Zeitschrift fur Naturforschung. A, A journal of physical sciences, 50(2-3), 1995, pp. 169-176
Citations number
27
Categorie Soggetti
Chemistry Physical",Physics
Journal title
Zeitschrift fur Naturforschung. A, A journal of physical sciences → ACNP
ISSN journal
09320784
Volume
50
Issue
2-3
Year of publication
1995
Pages
169 - 176
Database
ISI
SICI code
0932-0784(1995)50:2-3<169:2PEN-A>2.0.ZU;2-4
Abstract
Recently, P-31 two-dimensional (2D) NMR has been proposed as a powerfu l tool for direct investigations of the connectivities between the Q(m ) units in glasses, i.e. the medium-range order. In this paper, the pr inciples of these experiments and applications to both polycrystalline Mg2P2O7 and a Na2O-P2O5 glass are demonstrated, including a theoretic al description and modelling of the polarization transfer between the two inequivalent phosphorus sites in the magnesium pyrophosphate.