Pregled bibliografske jedinice broj: 332600
On the Dynamics of the Phase Transition in Phenanthrene
On the Dynamics of the Phase Transition in Phenanthrene // Journal of molecular structure, 143 (1986), 29-32 doi:10.1016/0022-2860(86)85197-3 (međunarodna recenzija, članak, znanstveni)
CROSBI ID: 332600 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
On the Dynamics of the Phase Transition in Phenanthrene
Autori
Baranović, Goran ; Volovšek, Vesna
Izvornik
Journal of molecular structure (0022-2860) 143
(1986);
29-32
Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni
Ključne riječi
Vibrational spectra ; phenanthrene ; dynamics ; phase transition
Sažetak
The temperature dependence of the phonon frequencies and bandwidths has been studied using Raman spectroscopy between 293 and 350 K. It can be seen that in the region of the phase transition at≈347 K there is a change in the slope of both curves. We have tried to explain these features by means of reorientation of molecules. Calculations have revealed an additional minimum of the lattice energy where the molecules are rotated by an angle of 180° around their axes relatively to their room temperature position. The stability of this proposed structure has been further tested by the calculation of the dispersion curves. No imaginary frequencies have been detected for the wave vectors chosen. Also, there are no great differences in the phonon frequencies of the two structures for k = 0, as has also been observed in the spectra recorded.
Izvorni jezik
Engleski
Znanstvena područja
Fizika, Kemija
POVEZANOST RADA
Ustanove:
Institut "Ruđer Bošković", Zagreb,
Fakultet kemijskog inženjerstva i tehnologije, Zagreb
Citiraj ovu publikaciju:
Časopis indeksira:
- Web of Science Core Collection (WoSCC)
- Science Citation Index Expanded (SCI-EXP)
- SCI-EXP, SSCI i/ili A&HCI
- Scopus
