Li-F polarity-driven stabilization of -VII oxidation state of gold at high pressure.

ABSTRACT: The exploration of unconventional oxidation states is pivotal for expanding fundamental bonding paradigms and accessing exotic matter. Achieving highly negative oxidation states in transition metals remains a significant challenge. Here, we propose a dual-driven strategy combining a strong reductant (Li) and oxidant (F) under high pressure, stabilizing the oxidation state -VII of gold (Au) in a ternary electride Li₁₀AuF. This insulating phase hosts paired interstitial anionic electrons and features an Au center nominally isoelectronic with the noble gas radon, governed by F-enhanced charge polarization, pressure-induced orbital reshuffling, and p-d hybridization that lowers the energy of Au 6p orbitals. Replacing F with I or P progressively reduces Au charge and interstitial ele

SUBMITTER: Zhang X 

PROVIDER: S-EPMC12748924 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature