Raman and surface enhanced raman signals of the sensor 1-(4-mercaptophenyl)-2,4,6-triphenylpyridinium perchlorate

• FREDDY CELIS ^[1] ; MARCELO CAMPOS-VALLETTE ^[2] ; JOSE CÁRCAMO VEGA ^[3] ; JUAN S GÓMEZ-JERIA ^[2] ; CAROLINA ALIAGA ^[4]
  1. [1] Universidad de Playa Ancha Centro de Estudios Avanzados
  2. [2] Universidad de Chile Facultad de Ciencias Departamento de Química
  3. [3] Universidad de Tarapacá Departamento de Antropología Laboratorio de Análisis e Investigaciones Arqueométricas
  4. [4] Universidad de Santiago de Chile Departamento de Ciencias del Ambiente

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• Localización: Journal of the Chilean Chemical Society (Boletín de la Sociedad Chilena de Química), ISSN-e 0717-6309, ISSN 0366-1644, Vol. 60, Nº. 2, 2015, págs. 2944-2948
• Idioma: inglés
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  • The sensor 1-(4-mercaptophenyl)-2,4,6-triphenylpyridinium Perchlorate compound was vibrationally characterized using Raman and the Surface-Enhanced Raman techniques, SERS and Shell-Isolated Nanoparticles-Enhanced Raman Spectroscopy (SHINERS). The Raman spectrum was analyzed and the band assignment was supported using DFT data at the B3LYP/6-31G(d) level. SERS data allowed infer about the orientation of the analyte on the naked Ag surface. EHT calculations for an Ag/analyte model represent well the SERS spectrum supporting the Ag-S bond formation. The SHINERS spectrum was obtained by using Ag@SiO2 nanoparticles prepared at two different time of the SiO2 coating process. The most intense SHINERS spectral signals of the compound (100 nM) were obtained after 20 minutes of the Ag@SiO2 formation. No charge-transfer was concluded from the SHINERS experiments.