Issue 4, 2018

Donor–anion interactions in quarter-filled low-dimensional organic conductors

Abstract

Anions have often been considered to act essentially as electron donors or acceptors in molecular conductors. However there is now growing evidence that they play an essential role in directing the structural and hence electronic properties of many of these systems. After reviewing the basic interactions and different ground states occurring in molecular conductors we consider in detail how anions influence the structure of donor stacks and often guide them toward different types of transitions. Consideration of the Bechgaard and Fabre salts illustrates how anions play a crucial role in directing these salts through complex phase diagrams where different conducting and localized states are in competition. We also emphasize the important role of hydrogen bonding and conformational flexibility of donors related to BEDT-TTF and we discuss how anions have frequently a strong control of the electronic landscape of these materials. Charge ordering, metal to metal and metal to insulator transitions occurring in these salts are considered.

Graphical abstract: Donor–anion interactions in quarter-filled low-dimensional organic conductors

Article information

Article type
Review Article
Submitted
10 Apr 2018
Accepted
07 Jun 2018
First published
07 Jun 2018

Mater. Horiz., 2018,5, 590-640

Donor–anion interactions in quarter-filled low-dimensional organic conductors

J. Pouget, P. Alemany and E. Canadell, Mater. Horiz., 2018, 5, 590 DOI: 10.1039/C8MH00423D

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