FT-IR study of some carotenoids

Abstract

Some natural and semisynthetic carotenoids were examined by means of FT-IR spectroscopy. The IR bands of the characteristic functional groups (CH3, CH2, C=C, C=O, OH, etc.) were assigned when possible. Some special functional groups - without H-atoms - such as C=C=C, 'cross epoxides', etc., which cannot be easily identified by 1H-NMR methods, were also detected in the FT-IR spectra.