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Anion polarity-induced self-doping in a purely organic paramagnetic conductor, α′-α′-(BEDT-TTF) 2 (PO-CONH- m -C 6 H 4 SO 3 )·H 2 O where BEDT-TTF is bis(ethylenedithio)tetrathiafulvalene and PO is the radical 2,2,5,5-Tetramethyl-3-pyrrolin-1-oxyl

Akutsu, Hiroki, Ishihara, Keita, Ito, Soich, Nishiyama, Fumiyoshi, Yamada, Jun-ichi, Nakatsuji, Shin'ichi, Turner, Scott and Nakazawa, Yasuhiro (2017) Anion polarity-induced self-doping in a purely organic paramagnetic conductor, α′-α′-(BEDT-TTF) 2 (PO-CONH- m -C 6 H 4 SO 3 )·H 2 O where BEDT-TTF is bis(ethylenedithio)tetrathiafulvalene and PO is the radical 2,2,5,5-Tetramethyl-3-pyrrolin-1-oxyl Polyhedron, 136. pp. 23-29.

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Abstract

A new BEDT-TTF-based salt with an organic free radical, α′-α′-(BEDT-TTF)2(PO-CONH-m-C6H4SO3)·H2O, has been prepared. The crystal structure consists of alternating donor and anion/water layers propagated along the c axis. The anisotropic radical anions form a head-to-head arrangement, which provides a permanent dipole moment. The effect on the nearest donor layer has been estimated to be 4.0 V. The salt has two crystallographically independent donor layers (A and B), one of which (A) is surrounded by the negative ends of the anion layer dipole whereas the B layers are bordered by the positive ends of the dipole. This structural feature suggests that layers A and B have different Fermi levels. To eliminate the imbalance, self-doping occurs whereby electron density is transferred from layer A to B. The temperature dependence of the magnetic susceptibility has 11.1% of extra Curie spins, from which a doping ratio of 12.7% has been estimated.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Chemistry
Authors :
NameEmailORCID
Akutsu, Hiroki
Ishihara, Keita
Ito, Soich
Nishiyama, Fumiyoshi
Yamada, Jun-ichi
Nakatsuji, Shin'ichi
Turner, ScottS.S.Turner@surrey.ac.uk
Nakazawa, Yasuhiro
Date : 9 February 2017
Identification Number : 10.1016/j.poly.2017.02.001
Copyright Disclaimer : © 2017 Elsevier Ltd. All rights reserved.
Uncontrolled Keywords : Organic conductors; Organic magnetic conductors; Polar anionic layer; Self-doping; BEDT-TTF
Additional Information : CCDC 1524053, 1524055, and 1524056 contain the supplementary crystallographic data for this paper. These data can be obtained free of charge via http://www.ccdc.cam.ac.uk/conts/retrieving.html, or from the Cambridge Crystallographic Data Centre, 12 Union Road, Cambridge CB2 1EZ, UK; fax: (+44) 1223-336-033; or e-mail: deposit@ccdc.cam.ac.uk.
Depositing User : Clive Harris
Date Deposited : 09 Mar 2018 13:34
Last Modified : 13 Mar 2018 15:45
URI: http://epubs.surrey.ac.uk/id/eprint/845973

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