The Ultraviolet Spectra of Chalcones and Aurones
Chalcones and aurones, which are often referred to as the “anthochlor” pigments because many turn red on contact with alkali, are relatively rare types of flavonoids . Detailed spectral analyses, in particular of synthetic chalcones and aurones, have been published elsewhere [2 – 5], but for completeness a number have been included here. The UV spectra of both chalcones and aurones are characterized by an intense Band I and a diminished Band II absorption.
KeywordsBathochromic Shift Hypsochromic Shift Ultraviolet Spectrum Wavelength Absorption Band Fluorescent Yellow Green
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