TIME-SCALE OF ELECTRONIC AND MOLECULAR MOTIONS IN THE CONDUCTING RADICAL-CATION SALT DIPERYLENE HEXAFLUOROPHOSPHATE

Citation
G. Nemec et al., TIME-SCALE OF ELECTRONIC AND MOLECULAR MOTIONS IN THE CONDUCTING RADICAL-CATION SALT DIPERYLENE HEXAFLUOROPHOSPHATE, Synthetic metals, 95(2), 1998, pp. 149-153
Citations number
19
Categorie Soggetti
Physics, Condensed Matter","Material Science","Polymer Sciences
Journal title
ISSN journal
03796779
Volume
95
Issue
2
Year of publication
1998
Pages
149 - 153
Database
ISI
SICI code
0379-6779(1998)95:2<149:TOEAMM>2.0.ZU;2-O
Abstract
Frequency and temperature dependence of nuclear spin lattice relaxatio n is used fbr the derivation of motional time scales in the quasi-one dimensional conductor diperylene hexafluorophosphate (incorporating te trahydrofurane (THF) solvent molecules). Freezing in of reorientationa l motion of the THF molecules at the stack-rotation phase transition T -r approximate to 153 K is proved by the use of perdeuterated solvent. Slowing down of hexafluorophosphate rotational motion is reflected by F-19 and :H-1 relaxation in the 100 K range. The time constant descri bing termination of the diffusive decay of the conduction-electron spi n correlation is estimated from frequency-dependent proton spin relaxa tion including rotating-frame data. (C) 1998 Elsevier Science S.A. All rights reserved.