Abstract
Crystal structure, optical and magnetic properties are reported for a unique class of donor-acceptor charge-transfer (CT) complex (BEDT-TTF)(F 2TCNQ). Charge-transfer from the donor to the acceptor is complete, forming an ionic mixed-stack CT crystal. “Side-by-side” interaction between BEDT-TTF molecules results in a one-dimensional (1D) correlated electronic system that is perpendicular to the donor-acceptor mixed-stack column. Consequently, F 2TCNQ radical spins are strongly isolated from neighboring molecules, showing Curie-like behavior in magnetic susceptibility, followed by an anti-ferromagnetic order at around T N = 30 K.
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