Le Gal, YannCui, HengboAlemany i Cahner, PereCanadell, Enric, 1950-Kato, ReizoRoisnel, ThierryDorcet, VincentFourmigué, M.Lorcy, Dominique2022-10-252022-10-252021-08-082050-7526https://hdl.handle.net/2445/190207While 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.12 p.application/pdfeng(c) Le Gal, Yann et al., 2021OrSemiconductorsPressióGoldSemiconductorsPressureinfo:eu-repo/semantics/article7249492022-10-25info:eu-repo/semantics/openAccess