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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Controlling the Selectivity of the Surface Plasmon Resonance Mediated Oxidation of p-Aminothiophenol on Au Nanoparticles by Charge Transfer from UV-excited TiO2

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Wang, Jiale [1] ; Ando, Romulo A. [1] ; Camargo, Pedro H. C. [1]
Total Authors: 3
[1] Univ Sao Paulo, Inst Quim, Dept Quim Fundamental, BR-05508000 Sao Paulo - Brazil
Total Affiliations: 1
Document type: Journal article
Source: ANGEWANDTE CHEMIE-INTERNATIONAL EDITION; v. 54, n. 23, p. 6909-6912, JUN 1 2015.
Web of Science Citations: 51

Although catalytic processes mediated by surface plasmon resonance (SPR) excitation have emerged as a new frontier in catalysis, the selectivity of these processes remains poorly understood. Here, the selectivity of the SPR-mediated oxidation of p-aminothiophenol (PATP) employing Au NPs as catalysts was controlled by the choice of catalysts (Au or TiO2-Au NPs) and by the modulation of the charge transfer from UV-excited TiO2 to Au. When Au NPs were employed as catalyst, the SPR-mediated oxidation of PATP yielded p,p-dimercaptobenzene (DMAB). When TiO2-Au NPs were employed as catalysts under both UVillumination and SPRexcitation, p-nitrophenol (PNTP) was formed from PATP in a single step. Interestingly, PNTP molecules were further reduced to DMAB after the UVillumination was removed. Our data show that control over charge-transfer processes may play an important role to tune activity, product formation, and selectivity in SPR-mediated catalytic processes. (AU)

FAPESP's process: 13/19861-6 - Controlled metal nanomaterials for catalysis applications
Grantee:Pedro Henrique Cury Camargo
Support type: Regular Research Grants
FAPESP's process: 13/05709-8 - Palladium, Silver-Palladium, and Palladium-Platinum Nanomaterials: Maneuvering Shape, Composition, and Structure for Catalytic Applications
Grantee:Jiale Wang
Support type: Scholarships in Brazil - Post-Doctorate