Journal
VIBRATIONAL SPECTROSCOPY
Volume 41, Issue 1, Pages 90-96Publisher
ELSEVIER
DOI: 10.1016/j.vibspec.2006.01.012
Keywords
SERS spectra; DFT calculations; RHF calculations; Rhodamine 123
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The adsorption of biologically important Rhodamine 123 molecule on silver colloids has been investigated by Surface enhanced resonance Raman scattering (SERRS) spectroscopy. The SERRS spectra are compared with its FTIR spectrum and normal Raman spectrum (NRS) in solution. The optimized structural parameters and computed vibrational wavenumbers have been estimated from ab initio (Hatree-Fock) and density functional theory (DFT) calculations. Some vibrational modes have been reassigned. From frontier orbital theory, the direction of charge transfer (CT) mechanism is concluded. (C) 2006 Elsevier B.V All rights reserved.
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