Surfactant‐aided surface‐enhanced Raman scattering of Zn(II), Co(II), Ni(II), Cu(II) and free‐base tetrakis(4‐sulphonatophenyl)porphyrins

Ok‐Keun ‐K Song, Eun‐Joo ‐J Shin, Minyung Lee, Dongho Kim, Joo‐Tak ‐T Han, Jong‐Gi ‐G Jee, Minjoong Yoon

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Abstract

Although surface‐enhanced Raman scattering (SERS) has been recognized as a powerful tool for investigating the vibrational structure of molecules, the requirement that the molecules under study should have appropriate functional groups to interact with the metal surface has been a major problem in applying the SERS effect to many chemical or biological systems. It is shown that the introduction of a surfactant such as cetyltrimethylammonium bromide in a silver sol results in a strong Raman signal enhancement of negatively charged water‐soluble metallotetrakis(4‐sulphonatophenyl)porphyrins. Without introducing CTAB into a silver sol, these porphyrin molecules did not show any colour change and consequently no SERS effect was observed. Such a surfactant‐aided SERS effect will provide the possibility of applying SERS to new molecular systems.

Original languageEnglish
Pages (from-to)667-672
Number of pages6
JournalJournal of Raman Spectroscopy
Volume23
Issue number12
DOIs
Publication statusPublished - 1992 Jan 1

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All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Spectroscopy

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