The Ultraviolet Spectra of Flavones and Flavonols

  • Tom J. Mabry
  • K. R. Markham
  • M. B. Thomas


The methanol spectra of flavones and flavonols exhibit two major absorption peaks in the region 240 – 400 nm1. These two peaks are commonly referred to as Band I (usually 300 – 380 nm, Table V-1 records the λmaxvalues for Band I for all flavones and flavonols examined in the present investigation), and Band II (usually 240 – 280 nm). Band I is considered to be associated with absorption due to the B-ring cinnamoyl system, and Band II with absorption involving the A-ring benzoyl system (see III) [1].


Methyl Ether Bathochromic Shift Hypsochromic Shift Ultraviolet Spectrum Oxidation Pattern 
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Copyright information

© Springer-Verlag New York Inc. 1970

Authors and Affiliations

  • Tom J. Mabry
    • 1
  • K. R. Markham
    • 1
  • M. B. Thomas
    • 1
  1. 1.The Cell Research Institute and Department of BotanyThe University of Texas at AustinUSA

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