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Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/190207
Mixed-valence gold bis (diselenolene) complex turning metallic under pressure.
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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.
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LE GAL, Yann, et al. Mixed-valence gold bis (diselenolene) complex turning metallic under pressure. Journal of Materials Chemistry C. 2021. Vol. 9, num. 36, pags. 12291-12302. ISSN 2050-7526. [consulted: 19 of August of 2026]. Available at: https://hdl.handle.net/2445/190207