M. Haritopoulou, J. Samios
, D. Dellis and E. Zoidis1
University of Athens, Department of Chemistry, Laboratory of Physical Chemistry, Panepistimiopolis, 157-71 Athens, Greece
Received 13 May 1992. Available online 21 November 2001.
Far-infrared absorption spectra of thiophene in liquid solutions with carbon disulfide
M. Haritopoulou, J. Samios, D. Dellis and E. Zoidis1
University of Athens, Department of Chemistry, Laboratory of Physical Chemistry, Panepistimiopolis, 157-71 Athens, Greece
Received 13 May 1992. Available online 21 November 2001.
The far-infrared absorption spectra of thiophene with carbon disulphide are presented for the first time at three mole fractions of thiophene. The spectral features clearly show that, for the whole range of concentrations of thiophene in CS2 considered, there exists a marked appearance of strong-interaction-induced phenomena between the two kinds of molecules and this is more evident in the absorption characteristics of the 0.75 mole fraction spectrum of thiophene in CS2, since there exist only slight differences from the spectrum of pure thiophene. This result might suggest that thiophene and CS2 probably "associate" to some degree when in a solution. The behaviour of the corresponding concentration-dependent total dipole autocorrelation functions (ACF) is discussed up to 1 ps, in terms of the interaction between solvent and solute. The absorption bands of pure thiophene are presented at two different temperatures, from where it is seen that as the temperature decreases the absorption increases and the spectrum is shifted by a small amount towards higher frequencies.
1 Present address: Department of Chemistry, University of Durham, Durham DH1 3LE, UK.
Correspondence to: J. Samios, University of Athens, Department of Chemistry, Laboratory of Physical Chemistry, Panepistimiopolis, 157-71 Athens, Greece.