43001 2017 eng 7803 7809 11 7 article American Chemical Society Washington 1 -- -- -- The mechanism of the plasmon-catalyzed reaction of p-aminothiophenol (PATP) to 4,4′-dimercaptoazobenzene (DMAB) on the surface of metal nanoparticles has been discussed using data from surface-enhanced Raman scattering of DMAB. Oxides and hydroxides formed in a plasmon-catalyzed process were proposed to play a central role in the reaction. Here, we report DMAB formation on gold nanoparticles occurring in the presence of the metal cations Ag+, Au3+, Pt4+, and Hg2+. The experiments were carried out under conditions where formation of gold oxide or hydroxide from the nanoparticles can be excluded and at high pH where the formation of the corresponding oxidic species from the metal ions is favored. On the basis of our results, we conclude that, under these conditions, the selective oxidation of PATP to DMAB takes place via formation of a metal oxide from the ionic species in a plasmon-catalyzed process. By evidencing the necessity of the presence of the metal cations, the reported results underpin the importance of metal oxides in the reaction. ACS Catalysis 10.1021/acscatal.7b02700 http://pubs.acs.org/doi/abs/10.1021/acscatal.7b02700 2155-5435 Geburtsname von Müller, Anja: Hermanns, A. - Birth name of Müller, Anja: Hermanns, A. 24.11.2017 Zhiyang Zhang V. Merk Anja Müller Wolfgang Unger Janina Kneipp eng uncontrolled Metal ions eng uncontrolled Plasmonic catalysis eng uncontrolled p-aminothiophenol eng uncontrolled 4,4'-dimercaptoazobenzene eng uncontrolled Surface-enhanced Raman scattering Analytische Chemie Verlagsliteratur Datei im Netzwerk der BAM verfügbar ("Closed Access")