Abstract
Surface-enhanced resonance Raman scattering spectroscopy was applied to measure the vibrational spectra of meso-tetramethylporphine (TMP), meso-tetraethylporphine (TEP), and their nickel complexes in layered structures having CaF 2/sample/Ag (structure I) and CaF 2/Ag/sample (structure II) configurations. The surface spectra clearly prove that, when the samples come into contact with Ag atoms (structure I) or a vacuum-deposited Ag film (structure II), they undergo chemical processes such as metal-incorporation and metal-exchange reactions, and a structural change.
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