期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 54, 期 23, 页码 6909-6912出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201502077
关键词
catalysis; nanoparticles; oxidation; photochemistry; surface plasmon resonances
资金
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [2013/19861-6]
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq) [471245/2012-7]
- CNPq
- FAPESP [2013/05709-8]
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [13/05709-8] Funding Source: FAPESP
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.
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