Temperature study of infrared reflection spectra on various faces of MTPP(TCNQ)2 single crystals
- 1 January 1983
- journal article
- Published by EDP Sciences in Journal de Physique
- Vol. 44 (5) , 617-621
- https://doi.org/10.1051/jphys:01983004405061700
Abstract
Crystals of the ion-radical salt MTPP(TCNQ)2 undergo a first-order structural phase transition at the temperature Tp = 315.7 K. This phase transition has a pronounced influence on the infrared spectra. In this paper we present and discuss the infrared spectra of MTPP(TCNQ)2 as a function of temperature. During thermal cycling we have observed an interesting thermal hysteresis of the reflection coefficients for different bands. Moreover, we have related the observed spectral modifications with the enthalpy of the phase transitionKeywords
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