Abstract
Surface-enhanced Raman scattering (SERS) spectroscopy was shown to be the very potent technique in the study of crown ether styryl dyes (CESDs) [1, 2]. It has been demonstrated that these photochromic ionophores can be traced by the SERS technique in 10−4-10−8 M range of concentrations unachievable with other spectroscopic (spectrophotometry, fluorescence, resonance Raman, NMR) techniques. Combining the Langmuir-Blodgett and SERS techniques the extreme sensitivity of the method was achieved in studying structural organization and aggregation properties of a monolayer of amphiphilic CESD [3]. In opposite to the absorption and fluorescence spectra the vibrational spectra of the dyes bring a wealth of information regarding the state and interaction of functionally important molecular groups.
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