Abstract
Abstract The Raman and absorption (ultraviolet through infrared) spectra of β-carotene doped with iodine and sulfur trioxide were studied. The doping gave significant effects on the Raman and absorption spectra which were interpreted as arising from the transfer of an electron from a local site in β-carotene to a dopant and the resultant shortening of the length of double-bond conjugation. Definite information on the form of iodine in the β-carotene—iodine complex was obtained.
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