Proton-electron coupling and mixed conductivity in a hydrogen-bonded coordination polymer.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 39900570.
- Also identified by DOI 10.1038/s41467-025-56541-2 and PMC identifier 11791098.
- Licence recorded as CC BY-NC-ND.
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Abstract
The fundamental understanding of coupled proton-electron transport in mixed protonic-electronic conductors (MPECs) remains unexplored in materials science, despite its potential significance within the broader context of mixed ionic-electronic conductors (MIECs) and the possibility of controlled diffusion of protons using hydrogen-bond networks. To address these limitations, we present a hydrogen-bonded coordination polymer Ni-BAND ({[Ni(bpy)(H<sub>2</sub>O)<sub>2</sub>(DMF)<sub>2</sub>](NO<sub>3</sub>)<sub>2</sub>·2DMF}<sub>n</sub>), which demonstrates high mixed protonic-electronic conductivity at room temperature. Through detailed analysis, we unravel the coupled transport mechanism, offering insights for the rational design of high-performance MPECs. We demonstrate the practical implications of this mechanism by examining the humidity-dependent synaptic plasticity of Ni-BAND, showcasing how MPECs can expand into traditional MIEC applications while leveraging their unique proton-mediated advantages.