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Control of the Electronic Structure of Organic Conductors as Exemplified by [NMP][TCNQ] Charge‐Transfer Complexes

1987; Wiley; Volume: 26; Issue: 4 Linguagem: Inglês

10.1002/anie.198702871

1521-3773

Joel S. Miller, Arthur J. Epstein,

Molecular Junctions and Nanostructures

Abstract Through replacement of cations with neutral molecules of similar shape and polarizability in a highly conducting “metal‐like” change‐transfer organic conductor, the deliberate control of the electronic structure from a quarter to a half‐filled band is possible. This goal has been achieved with the N ‐methylphenazinium (NMP) salt of the tetracyanoquinodimethane (TCNQ) anion by partial replacement of the cation with phenazine. A detailed study of the optical, electrical, and magnetic properties of these conducting molecular solids has lead to the evolution of a broad understanding of the physics of one‐dimensional organic conductors and a reinterpretation of the mechanism of electron transport in such solids. Phenomena such as switching from a low coulomb repulsion two‐chain conductor to a high coulomb repulsion one‐chain conductor as well as soliton‐assisted electron transport are observed.