Organic chemistry

Fluorene

Organic semiconductor

Electron transfer

Chemistry

Materials science

Acetic acid

Diimide

Perylene

Molecule

Polymer

Photochemistry

Angewandte Chemie International Edition

An organic semiconductor–bacteria biohybrid photosynthetic system is used to efficiently realize CO 2 reduction to produce acetic acid with the non‐photosynthetic bacteria Moorella thermoacetica. Perylene diimide derivative (PDI) and poly(fluorene‐co‐phenylene) (PFP) were coated on the bacteria surface as photosensitizers to form a p‐n heterojunction (PFP/PDI) layer, affording higher hole/electron separation efficiency. The π‐conjugated semiconductors possess excellent light‐harvesting ability and biocompatibility, and the cationic side chains of organic semiconductors could intercalate into cell membranes, ensuring efficient electron transfer to bacteria. Moorella thermoacetica can thus harvest photoexcited electrons from the PFP/PDI heterojunction, driving the Wood–Ljungdahl pathway to synthesize acetic acid from CO 2 under illumination. The efficiency of this organic biohybrid is about 1.6 %, which is comparable to those of reported inorganic biohybrid systems.

Solar‐Powered Organic Semiconductor–Bacteria Biohybrids for CO<sub>2</sub> Reduction into Acetic Acid

Solar‐Powered Organic Semiconductor–Bacteria Biohybrids for CO2 Reduction into Acetic Acid

Solar‐Powered Organic Semiconductor–Bacteria Biohybrids for CO₂ Reduction into Acetic Acid