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  • Title: SERS studies of the adsorption of guanine derivatives on gold colloidal nanoparticles.
    Author: Pergolese B, Bonifacio A, Bigotto A.
    Journal: Phys Chem Chem Phys; 2005 Oct 21; 7(20):3610-3. PubMed ID: 16294239.
    Abstract:
    Surface enhanced Raman scattering spectra of guanine, guanosine and 2'-deoxyguanosine adsorbed on gold colloidal nanoparticles were obtained. From the striking similarity of the SERS spectra of these compounds, it can be evidenced that guanosine and 2'-deoxyguanosine adsorb on gold nanoparticles through the guanine moiety. The molecular sites involved in the interaction with the gold surface are the same for the 3 compounds: the oxygen of the carbonilic group and the N(7) atom. Guanine, guanosine and 2'-deoxyguanosine adsorb on the gold substrates with a tilted orientation with respect to the metal surface. SERS data were interpreted taking into account density functional theoretical (DFT) calculations of guanine.
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