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Title: Mixed-valence gold bis (diselenolene) complex turning metallic under pressure.
Author: Le Gal, Yann
Cui, Hengbo
Alemany i Cahner, Pere
Canadell, Enric, 1950-
Kato, Reizo
Roisnel, Thierry
Dorcet, Vincent
Fourmigué, M.
Lorcy, Dominique
Keywords: Or
Issue Date: 8-Aug-2021
Publisher: Royal Society of Chemistry
Abstract: While oxidation of d8 anionic gold bis(dithiolene) complexes most often affords the corresponding neutral radical single-component conductor, an original gold bis(diselenolene) complex isolated as a Ph4P+ salt affords upon electrocrystallization a mixed-valence 1 : 2 salt, [Ph4P][Au(Me-thiazds)2]2 (Me-thiazds: 2-methyl-1,3-thiazoline-2-thione-4,5-diselenolate). This salt exhibits a rare charge alternation associated with the simultaneous presence of both cis and trans isomers of the gold complex in the conducting layers. The salt is semiconducting (σRT = 3 × 10−2 S cm−1, Eact = 0.137 eV) but, in contrast with other 1 : 2 gold bis(dithiolene) salts, turns metallic under pressure (>10 GPa). [Ph4P][Au(Me-thiazds)2]2 is thus the first metallic, fully characterized, 1 : 2 mixed-valence gold complex, opening the door for the preparation of highly conducting solids of this type.
Note: Versió postprint del document publicat a:
It is part of: Journal of Materials Chemistry C, 2021, vol. 9, num. 36, p. 12291-12302
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ISSN: 2050-7526
Appears in Collections:Articles publicats en revistes (Ciència dels Materials i Química Física)
Articles publicats en revistes (Institut de Química Teòrica i Computacional (IQTCUB))

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