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- W2080494821 abstract "The SERS (surface-enhanced Raman scattering) and SERRS (surface-enhanced resonant Raman scattering) spectra of iron(II) phthalocyanine (FePc) adsorbed onto a silver electrode have been investigated. The electrochemical SERRS has shown that the reduction of FePc molecule is reversible at negative potentials below −1.0 V vs Ag/AgCl. The SERS spectra obtained by excitation off resonance contain mainly a1g and a2g vibrational modes. The excitation profiles of these modes show a maximum of SERS intensity that shifts to more positive values as the laser energy is decreased. We discuss the results of the a2g modes as being enhanced by a potential modulated adsorbate to metal charge-transfer mechanism, in which two electronic states of the MPc are coupled by a Herzberg−Teller term. In this case the acceptor state is localized on the Ag−SERS active site and the MPc coupling electronic excited states are of A2u and A1u symmetry, resulting in the enhancement of a2g vibrational modes." @default.
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- W2080494821 date "1998-06-30" @default.
- W2080494821 modified "2023-09-27" @default.
- W2080494821 title "Contribution of the Herzberg−Teller Mechanism to the Surface-Enhanced Raman Scattering of Iron Phthalocyanine Adsorbed on a Silver Electrode" @default.
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- W2080494821 doi "https://doi.org/10.1021/la980062r" @default.
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