Surface enhanced Raman scattering of trans-3-hydroxycinnamic acid adsorbed on silver nanoparticles

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abstract

SERS of trans-3-hydroxycinnamic acid adsorbed on silver colloids have been analyzed in order to detect resonant charge transfer processes similar to a resonance Raman mechanism, involving the photoinduced transfer of an electron from the metal to the adsorbate (SERS-CT). Theoretical SERS-CT intensities for the neutral, anionic and dianionic forms have been calculated and it was found that the active SERS species corresponds to cinnamate ion linked to the metal through its carboxylate group. Moreover, it has been shown that the SERS-CT mechanism is operating in the SERS, explaining the strong enhancement of the band at ca. 1600 cm (1), assigned to the 8a mode. (C) 2008 Elsevier B.V. All rights reserved.

keywords

CHARGE-TRANSFER MECHANISM; RESONANCE RAMAN; SELECTION-RULES; SPECTROSCOPY; ELECTRODE; PYRIDINE; COMPLEX; STATES

subject category

Chemistry; Physics

authors

Sardo, M; Ruano, C; Castro, JL; Lopez-Tocon, I; Ribeiro-Claro, PJA; Otero, JC

our authors

foto Mariana Coutinho Sardo

Mariana Coutinho Sardo

Assistant Researcher
foto Paulo Ribeiro-Claro

Paulo Ribeiro-Claro

Associate Professor with Aggregation

Groups

G1 - Porous Materials and Nanosystems
G6 - Virtual Materials and Artificial Intelligence

acknowledgements

This work was supported by Spanish MEC (projects NAN2004-09312C03-01 and CTQ2006-02330) and the Portuguese Foundation for Science and Technology (FCT)-Laboratorio Associado CICECO. M. S. and C. R. also acknowledge FCT and MEC for their Ph. D. grants SFRH/BD/23400/2005 and BES-2007-17250, respectively.

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Publication Details

type
Journal Article
year
2008
journal
CHEMICAL PHYSICS LETTERS
volume
467
publisher
ELSEVIER SCIENCE BV
issn
0009-2614
issue
1-3
digital object identifier
10.1016/j.cplett.2008.10.083
web of science article identifier
WOS:000261407000022

Journal Metrics (JCR 2019)

Journal Impact Factor
2.029
Journal Impact Factor (5 yrs)
1.724
category normalized journal percentile
40.473

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