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Issue 20, 2009
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IR and Raman spectra of β″-(BEDT-TTF)2RCH2SO3 (R = SF5, CF3): dimerization related to hydrogen bonding

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Abstract

The β″-(BEDT-TTF)2CF3CH2SO3 organic conductor has been synthesized by electrocrystallization. The crystal structure was determined by single-crystal X-ray diffraction and electronic properties examined. The polarized IR reflectance of β″-(BEDT-TTF)2SF5CH2SO3 and β″-(BEDT-TTF)2CF3CH2SO3, as well as Raman spectra of β″-(BEDT-TTF)2CF3CH2SO3 have been measured as a function of temperature. Both materials display charge-nonequivalence within the whole temperature range and unusual activation of vibronic modes with lowering the temperature. In particular, electron-molecular vibration coupling is involved in the activation of the ν27 mode. The effect is discussed in terms of lattice dimerization involving hydrogen bonding between the anion layer and the conducting BEDT-TTF layer.

Graphical abstract: IR and Raman spectra of β″-(BEDT-TTF)2RCH2SO3 (R = SF5, CF3): dimerization related to hydrogen bonding

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Supplementary files

Article information


Submitted
11 Dec 2008
Accepted
16 Feb 2009
First published
12 Mar 2009

Phys. Chem. Chem. Phys., 2009,11, 3910-3920
Article type
Paper

IR and Raman spectra of β″-(BEDT-TTF)2RCH2SO3 (R = SF5, CF3): dimerization related to hydrogen bonding

I. Olejniczak, B. Barszcz, A. Szutarska, A. Graja, R. Wojciechowski, J. A. Schlueter, A. N. Hata and B. H. Ward, Phys. Chem. Chem. Phys., 2009, 11, 3910
DOI: 10.1039/B822253C

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