Jump to main content
Jump to site search

Issue 2, 2016
Previous Article Next Article

Nanoantioxidant-driven plasmon enhanced proton-coupled electron transfer

Author affiliations

Abstract

Proton-coupled electron transfer (PCET) reactions involve the transfer of a proton and an electron and play an important role in a number of chemical and biological processes. Here, we describe a novel phenomenon, plasmon-enhanced PCET, which is manifested using SiO2-coated Ag nanoparticles functionalized with gallic acid (GA), a natural antioxidant molecule that can perform PCET. These GA-functionalized nanoparticles show enhanced plasmonic response at near-IR wavelengths, due to particle agglomeration caused by the GA molecules. Near-IR laser irradiation induces strong local hot-spots on the SiO2-coated Ag nanoparticles, as evidenced by surface enhanced Raman scattering (SERS). This leads to plasmon energy transfer to the grafted GA molecules that lowers the GA–OH bond dissociation enthalpy by at least 2 kcal mol−1 and therefore facilitates PCET. The nanoparticle-driven plasmon-enhancement of PCET brings together the so far unrelated research domains of nanoplasmonics and electron/proton translocation with significant impact on applications based on interfacial electron/proton transfer.

Graphical abstract: Nanoantioxidant-driven plasmon enhanced proton-coupled electron transfer

Back to tab navigation

Supplementary files

Publication details

The article was received on 23 Jul 2015, accepted on 28 Sep 2015 and first published on 05 Oct 2015


Article type: Paper
DOI: 10.1039/C5NR04942C
Citation: Nanoscale, 2016,8, 796-803
  •   Request permissions

    Nanoantioxidant-driven plasmon enhanced proton-coupled electron transfer

    G. A. Sotiriou, C. O. Blattmann and Y. Deligiannakis, Nanoscale, 2016, 8, 796
    DOI: 10.1039/C5NR04942C

Search articles by author

Spotlight

Advertisements