Spearman, P., Borghesi, A., Campione, M., Laicini, M., Moret, M. and Tavazzi, S. (2005) Directional dispersion in absorbance spectra of oligothiophene crystals. The Journal of Chemical Physics, 122(1), ISSN (print) 0021-9606Full text not available from this archive.
Due to the large oscillator strength of the first molecular transition in oligothiophenes, a strong directional dispersion of the b(u) exciton transition is expected originating from the macroscopic polarization field. Examining such dispersion unambiguously usually requires different faces to be accessible for the optical measurements. Alternatively, measurements carried out at different angles of incidence are met with intrinsic limits due to the peculiarities of wave propagation in such anisotropic systems. In order to demonstrate these limits along with the experimental difficulties involved, we examine refraction and absorption of light in these crystals and discuss the effects of directional dispersion on the absorbance spectra of quaterthiophene crystals.
|Additional Information:||Article no: 014706.|
|Uncontrolled Keywords:||alpha-oligothiophenes, quaterthiophene|
|Research Area:||Metallurgy and materials|
|Faculty, School or Research Centre:||Faculty of Science (until 2011) > School of Pharmacy and Chemistry|
|Depositing User:||Ban Talal|
|Date Deposited:||19 Mar 2007|
|Last Modified:||20 Jan 2012 14:18|
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