New BEDT-TTF radical cation salt with mixed anions: α'-[BEDT-TTF]2[CuBr2]0.4[CuCl2]0.6

Abstract

A new mixed-anion crystal composed of BEDT-TTF radical cation salt [BEDT-TTF]2(CuBr2)0.4(CuCl2)0.6 with an α'-type donor arrangement with a formal charge of +0.5 per BEDT-TTF was prepared by using a chemical oxidation method and characterized by using X-ray diffraction, four-probe electrical resistivity measurements (semiconductor: ρrt = 2 × 102 Ω cm, Ea = 0.2 eV), and energy band calculations. The results showed that this system had a quasi-one dimensional Fermi surface. © 2011 by the authors; licensee MDPI, Basel, Switzerland.