Low-frequency (10–150 cmˉ¹) Raman spectra of the low-temperature (LT) and high-temperature (HT) polymorphs of the organic semiconductor α-quaterthiophene at 300 and 10 K are reported. Polarized spectra, assisted by quasi-harmonic lattice dynamics (QHLD) calculations, allow characterization of the lattice phonon dynamics and identification of the two phases spectroscopically. The experimental data can be explained by taking into account the coupling between intermolecular (lattice) and low-frequency intramolecular modes. Finally, Raman mapping is used to investigate the phase purity.

Ranzieri, P., Girlando, A., Tavazzi, S., Campione, M., Raimondo, L., Bilotti, I., et al. (2009). Polymorphism and phonon dynamics of α-quaterthiophene. CHEMPHYSCHEM, 10, 657-663 [10.1002/cphc.200800771].

Polymorphism and phonon dynamics of α-quaterthiophene

TAVAZZI, SILVIA;CAMPIONE, MARCELLO;RAIMONDO, LUISA;
2009

Abstract

Low-frequency (10–150 cmˉ¹) Raman spectra of the low-temperature (LT) and high-temperature (HT) polymorphs of the organic semiconductor α-quaterthiophene at 300 and 10 K are reported. Polarized spectra, assisted by quasi-harmonic lattice dynamics (QHLD) calculations, allow characterization of the lattice phonon dynamics and identification of the two phases spectroscopically. The experimental data can be explained by taking into account the coupling between intermolecular (lattice) and low-frequency intramolecular modes. Finally, Raman mapping is used to investigate the phase purity.
Articolo in rivista - Articolo scientifico
molecular dynamics; polymorphism; Raman spectroscopy; statistical thermodynamics; thiophenes
English
657
663
Ranzieri, P., Girlando, A., Tavazzi, S., Campione, M., Raimondo, L., Bilotti, I., et al. (2009). Polymorphism and phonon dynamics of α-quaterthiophene. CHEMPHYSCHEM, 10, 657-663 [10.1002/cphc.200800771].
Ranzieri, P; Girlando, A; Tavazzi, S; Campione, M; Raimondo, L; Bilotti, I; Brillante, A; Della Valle, R; Venuti, E
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/10281/8286
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