Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10618691 | Synthetic Metals | 2005 | 10 Pages |
Abstract
We report the polarized reflectance spectra (650-6500 cmâ1) as well FT-NIR Raman spectra of βâ³-(BEDT-TTF)3(NO3)2 and δ-(BEDT-TTF)2(NO3)0.9(NO2)0.1 salts as a function of temperature. Additionally, the crystal structure of δ-phase salt was determined at room temperature and the temperature dependence of electrical conductivity was measured. The reflectance spectra of metallic βâ³-phase salt were fitted with the Drude model; the metal-insulator transition at T = 20-27 K has practically no influence on IR spectra. The δ-phase salt shows semiconducting behavior; inside conducting organic layers the BEDT-TTF molecules are arranged in dimers. The specific vibrational features of the δ-salt are discussed in terms of hydrogen bonding between BEDT-TTF and anions.
Related Topics
Physical Sciences and Engineering
Materials Science
Biomaterials
Authors
R. Åwietlik, A. ÅapiÅski, M. PoÅomska, N.D. Kushch, A.N. Chekhlov,