Remote Optically Controlled Modulation of Catalytic Properties of Nanoparticles through Reconfiguration of the Inorganic/Organic Interface
| Autor: | Mark T. Swihart, Billy Scola, Yue Li, Yang Liu, Randy L. Lawrence, Marc R. Knecht, Chang Keun Lim, Paras N. Prasad |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Photoswitch Ligand General Engineering General Physics and Astronomy Nanoparticle Nanotechnology 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Photochemistry 01 natural sciences 0104 chemical sciences Catalysis Overlayer chemistry.chemical_compound Adsorption Azobenzene chemistry General Materials Science 0210 nano-technology Isomerization |
| Zdroj: | ACS nano. 10(10) |
| ISSN: | 1936-086X |
| Popis: | We introduce here a concept of remote photoinitiated reconfiguration of ligands adsorbed onto a nanocatalyst surface to enable reversible modulation of the catalytic activity. This is demonstrated by using peptide-ligand-capped Au nanoparticles with a photoswitchable azobenzene unit integrated into the biomolecular ligand. Optical switching of the azobenzene isomerization state drives rearrangement of the ligand layer, substantially changing the accessibility and subsequent catalytic activity of the underlying metal surface. The catalytic activity was probed using 4-nitrophenol reduction as a model reaction, where both the position of the photoswitch in the peptide sequence and its isomerization state affected the catalytic activity of the nanoparticles. Reversible switching of the isomerization state produces reversible changes in catalytic activity via reconfiguration of the biomolecular overlayer. These results provide a pathway to catalytic materials whose activity can be remotely modulated, which could be important for multistep chemical transformations that can be accessed via nanoparticle-based catalytic systems. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|