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The Ultraviolet Spectra of Flavones and Flavonols

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

Abstract

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].

Keywords

Methyl Ether Bathochromic Shift Hypsochromic Shift Ultraviolet Spectrum Oxidation Pattern 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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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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