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Surfactant‐aided surface‐enhanced Raman scattering of Zn(II), Co(II), Ni(II), Cu(II) and free‐base tetrakis(4‐sulphonatophenyl)porphyrins
Author(s) -
Song OkKeun,
Shin EunJoo,
Lee Minyung,
Kim Dongho,
Han JooTak,
Jee JongGi,
Yoon Minjoong
Publication year - 1992
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.1250231203
Subject(s) - raman scattering , porphyrin , molecule , pulmonary surfactant , raman spectroscopy , bromide , chemistry , photochemistry , metal , inorganic chemistry , organic chemistry , optics , biochemistry , physics
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.