Light‐driven Reversible Intermolecular Proton Transfer in Single‐Molecule Junction

Photoresponsive molecular systems are essential for the molecular optoelectronic devices, but most molecular building blocks are non‐photoresponsive. Herein, we employ the photoinduced proton transfer (PIPT) strategy to control the charge transport through single‐molecule azulene junctions with visible light under ambient conditions, which leads to a reversible and controllable photoresponsive molecular device based on non‐photoresponsive molecules and a photoacid. We further demonstrate the application of PIPT in two single‐molecule AND gate and OR gate devices with electrical signal as outputs.

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