Citation
T. Kuroda, N",hasanudin,"sugimoto et al., Temperature dependence of electronic optical absorption in (NMe4+center dot TCNQ(-center dot))(2)TCNQ, SYNTH METAL, 103(1-3), 1999, pp. 2327-2328
Citations number
3
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
SYNTHETIC METALS
ISSN journal
03796779
→ ACNP
Volume
103
Issue
1-3
Year of publication
1999
Pages
2327 - 2328
Database
ISI
SICI code
0379-6779(199906)103:1-3<2327:TDOEOA>2.0.ZU;2-I
Abstract
The temperature dependence of the linearly polarized optical absorption spe
ctrum has been measured in single crystals of (NMe4+. TCNQ(-.)),TCNQ, where
NMe4 and TCNQ are tetramethylammoniun and tetracyanoquinodimethane, respec
tively, in the temperature range between -100 and +150 degrees C. In additi
on to intense TCNQ(-.) dimer bands, strongly temperature-dependent satellit
e bands appear at around 1.3 eV and 1.9 eV. The singular behavior of the in
tensity and peak position of the 1.3 eV band shows that a second order phas
e transition takes place at 126 degrees C. The origin of this band is discu
ssed in relation to the mechanism of the phase transition.