Plasmonic Nanorattles as Next-Generation Catalysts for Surface Plasmon Resonance-Mediated Oxidations Promoted by Activated Oxygen

Author(s)

da Silva, Anderson G. M. ; Rodrigues, Thenner S. ; Correia, Valquirio G. ; Alves, Tiago V. ; Alves, Rafael S. ; Ando, Romulo A. ; Ornellas, Fernando R. ; Wang, Jiale ; Andrade, Leandro H. ; Camargo, Pedro H. C.

• Document type: Journal article
• Source: ANGEWANDTE CHEMIE-INTERNATIONAL EDITION; v. 55, n. 25, p. 7111-7115, JUN 13 2016.
• Web of Science Citations: 37

Abstract

Nanorattles, comprised of a nanosphere inside a nanoshell, were employed as the next generation of plasmonic catalysts for oxidations promoted by activated O-2. After investigating how the presence of a nanosphere inside a nanoshell affected the electric-field enhancements in the nanorattle relative to a nanoshell and a nanosphere, the SPR-mediated oxidation of p-aminothiophenol (PATP) functionalized at their surface was investigated to benchmark how these different electric-field intensities affected the performances of Au@AgAu nanorattles, AgAu nanoshells and Au nanoparticles having similar sizes. The high performance of the nanorattles enabled the visible-light driven synthesis of azobenzene from aniline under ambient conditions. As the nanorattles allow the formation of electromagnetic hot spots without relying on the uncontrolled aggregation of nanostructures, it enables their application as catalysts in liquid phase under mild conditions using visible light as the main energy input. (AU)

• FAPESP's process: 15/21366-9 - HYBRID MATERIALS CONTAINING METAL NANOPARTICLES FOR CATALYTIC APPLICATIONS
• Grantee: Pedro Henrique Cury Camargo
• Support Opportunities: Regular Research Grants
• FAPESP's process: 13/19861-6 - Controlled metal nanomaterials for catalysis applications
• Grantee: Pedro Henrique Cury Camargo
• Support Opportunities: Regular Research Grants