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Particle on a Rod: Surface-Tethered Catalyst on CdS Nanorods for Enzymatically Active Nicotinamide Cofactor
Lihini Jayasinghe1, Jiaxi Wei1, Jinhyun Kim1,2
1Department of Chemistry, University of California, Berkeley, Berkeley, California 94720, United States.
Nano Letters
|October 14, 2024
Summary
This study demonstrates efficient photochemical generation of nicotinamide cofactor 1,4-NADH using cadmium sulfide (CdS) nanorods and a rhodium catalyst. This breakthrough enhances photosynthetic biohybrid systems and solar-to-chemical synthesis.
Area of Science:
- * Nanotechnology and Materials Science
- * Photochemistry and Catalysis
- * Bioinorganic Chemistry
Background:
- * Inorganic photosensitizers offer a model for studying charge transfer in semiconductor-bacteria interfaces.
- * Current semiconductor nanocrystal systems struggle with efficient visible light conversion for cofactor generation.
- * Photosynthetic Biohybrid Systems (PBSs) require efficient light absorption and charge transfer for solar energy conversion.
Purpose of the Study:
- * To investigate quasi-one-dimensional CdS nanorods as superior light absorbers for photochemical NADH generation.
- * To enhance conversion efficiency in inorganic photosensitizer-based nicotinamide cofactor production.
- * To explore charge transfer kinetics for improved solar-to-chemical synthesis.
Main Methods:
- * Synthesized quasi-one-dimensional CdS nanorods as light absorbers.
- * Surface-modified CdS nanorods with Cp*Rh(4,4'-COOH-bpy)Cl2 catalyst.
- * Assessed product isolation and measured turnover frequency (TOF).
- * Characterized charge transfer kinetics.
Main Results:
- * Achieved a high turnover frequency (TOF) of 175 h⁻¹ for NADH generation.
- * Demonstrated charge transfer kinetics ranging from 10⁶ to 10⁸ s⁻¹.
- * Highlighted superior electron transfer capabilities of CdS nanorods.
- * Enabled easy product isolation for the cofactor generation system.
Conclusions:
- * CdS nanorods with a rhodium catalyst provide highly efficient photochemical nicotinamide cofactor generation.
- * The system demonstrates significant potential for advancing photosynthetic biohybrid systems.
- * Offers critical insights into mimicking natural photosynthesis for sustainable solar-to-chemical synthesis.
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