Ion Diffusion and (Photo)redox Conductivity in a Covalent Organic Framework

Covalent organic frameworks (COFs) have emerged as promising materials for energy-related applications, where precise control over charge and mass transport is critical, such as in electrocatalysis and battery technologies. Despite ongoing debates on the mechanisms of charge transport in COFs─particularly band transport versus electron hopping─experimental evidence for redox conductivity via hopping remains limited. In this work, we investigate redox hopping-mediated charge transport in a naphthalene diimide (NDI)-based redox-active COF (TAPT–NDI COF), examining the influence of ion and solvent environment. We show that electron hopping through ion-coupled self-exchange between oxidized and reduced linkers is…

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  Alexander von Humboldt-Stiftung