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Relationship between resonant Raman scattering in Ag–C 2 H 4 complexes and SERS
Author(s) -
Brings R.,
Mrozek I.,
Otto A.
Publication year - 1991
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.1250220213
Subject(s) - raman scattering , raman spectroscopy , electron transfer , excitation , molecule , quenching (fluorescence) , chemistry , analytical chemistry (journal) , molecular vibration , oxygen , absorption (acoustics) , scattering , fluorescence , photochemistry , materials science , optics , physics , electrical engineering , organic chemistry , chromatography , composite material , engineering
Concentrations less than 10 −2 of silver dispersed in C 2 H 4 matrices (ratio of Ag atoms and C 2 H 4 molecules in the matrix) induce an absorption band in the visible range by electron transfer excitation and (with the exception of the C–H stretch vibrations) shifted Raman bands, assigned to resonant enhancement by two orders of magnitude by electron transfer in Ag–C 2 H 4 complexes. Both phenomena are absent for Ag dispersed in C 2 H 6 . These results are analogous to the chemical specific and vibrational selective surface‐enhanced Raman scattering (SERS) of C 2 H 4 and C 2 H 6 . The loss of the electron transfer excitation by mixing oxygen into the Ag–C 2 H 4 matrix (as measured by Ozin et al. ) corresponds to the quenching of SERS by oxygen.