Nanoantioxidant-driven plasmon enhanced proton-coupled electron transfer.

Area of Science:

• Nanoplasmonics
• Physical Chemistry
• Biochemistry

Background:

• Proton-coupled electron transfer (PCET) is vital in chemical and biological systems.
• Existing research has not explored the enhancement of PCET using plasmonic nanoparticles.

Purpose of the Study:

• To investigate and demonstrate a novel phenomenon: plasmon-enhanced PCET.
• To utilize gallic acid (GA) functionalized nanoparticles for enhanced PCET reactions.

Main Methods:

• Fabrication of SiO2-coated Ag nanoparticles functionalized with gallic acid (GA).
• Characterization of plasmonic properties and particle agglomeration using surface-enhanced Raman scattering (SERS).
• Irradiation with near-IR laser to induce local hot-spots and plasmon energy transfer.

Main Results:

• GA-functionalized nanoparticles exhibited enhanced plasmonic response at near-IR wavelengths.
• Near-IR laser irradiation created localized hot-spots on nanoparticles.
• Plasmon energy transfer significantly lowered the GA-OH bond dissociation enthalpy, facilitating PCET.

Conclusions:

• Demonstrated a novel plasmon-enhanced PCET phenomenon.
• Successfully linked nanoplasmonics with electron/proton transfer research.
• Opened new avenues for applications involving interfacial electron and proton transfer.