Surface vibrational study of macrocycle complexes: Co(II), Ni(II), Cu(II) and Zn(II) bis(phenylhydrazine)-1,10-phenanthroline

Abstract

A complete assignment of the infrared spectra of the title macrocycles was carried out on the basis of well-documented references and a normal coordinate analysis based on a simplified molecular model. The structure of the complexes has been inferred from IR and UV-VIS data. Infrared reflection-absorption (IRRAS) spectra using a smooth copper surface and surface enhanced Raman spectra of samples dissolved in colloidal silver were registered. The non-planar structure of the coordination site and the sterical hindrance imposed by phenyl substituent fragments avoid any adsorbate-substrate interaction.