ArticleScience advances2026
Molecular-level D-A interaction engineering for high-efficiency photoelectric nanofluidic ion transport.
Article in Science advances, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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6 authors.
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Abstract
Inspired by biological light-driven ion transport, photoelectric nanofluidic systems offer a promising route toward intelligent ion regulation and signal transduction. Unlike traditional semiconductors constrained by rigid band structures, donor-acceptor (D-A) materials present superior tunability and photoelectric conversion efficiency. Here, we demonstrate molecular-level engineering of D-A interactions in covalent organic frameworks (COFs) to achieve efficient light-enhanced nanofluidic ion transport. By systematically varying the electron-donating and electron-accepting strengths of the building blocks, we designed two D-A COFs, namely D-A PCOF and D-A MCOF, with gradually modulated surface charge density. Among them, D-A PCOF, which integrates strong acceptor and donor units into a single crystalline framework, displays optimized optoelectronic properties. This structural and electronic synergy facilitates efficient photoinduced charge separation and directional carrier migration, resulting in significantly enhanced selective ion transport. When applied in osmotic energy conversion, the D-A PCOF membrane delivers a remarkable 74% increase in output power under illumination across a 50-fold salinity gradient and achieves a high-power density of 83.4 W m
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