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Experimental and Theoretical Study on Isotopic Surface-Enhanced Raman Spectroscopy for the Surface Catalytic Coupling Reaction on Silver Electrodes
- Source :
- The Journal of Physical Chemistry C. 120:11956-11965
- Publication Year :
- 2016
- Publisher :
- American Chemical Society (ACS), 2016.
-
Abstract
- Surface-enhanced Raman Spectroscopy (SERS) as a unique spectroscopic tool has been broadly used to detect surface reactions, yet normal SERS detection and theoretical simulation cannot satisfy the urgent need of revealing detailed reaction mechanisms. Here, we introduce an isotopic SERS method to demonstrate the occurrence of surface chemical reactions theoretically and experimentally. Isotopic effects on Raman vibrational frequency and intensity due to the change of reduced masses and the vibrational coupling were verified by DFT simulations and its corresponding isotopic SERS measurements. Taking surface catalytic coupling reactions of PATP/PNTP to DMAB on silver surfaces as the modeling system, we first created chemically identical yet vibrationally distinct isotopologues of redox species by artificial isotopic substitution. Our theoretical and experimental results both showed the isotopic effects have obviously different features in the fundamental frequencies and the relative intensities in the Raman...
- Subjects :
- Reaction mechanism
Chemistry
Analytical chemistry
02 engineering and technology
Surface-enhanced Raman spectroscopy
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
Redox
0104 chemical sciences
Surfaces, Coatings and Films
Electronic, Optical and Magnetic Materials
Catalysis
symbols.namesake
General Energy
Molecular vibration
symbols
Isotopologue
Physics::Chemical Physics
Physical and Theoretical Chemistry
Nuclear Experiment
0210 nano-technology
Raman spectroscopy
Rotational–vibrational coupling
Subjects
Details
- ISSN :
- 19327455 and 19327447
- Volume :
- 120
- Database :
- OpenAIRE
- Journal :
- The Journal of Physical Chemistry C
- Accession number :
- edsair.doi...........dabf7f4535e5dba4aafaaa837abdbe79