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. 1998 May;67(5):538-40.

The origin of the wavelength-dependent photoreactivity of trans-urocanic acid

K M Hanson  1 , J D Simon
Affiliations
  • PMID: 9613237

The origin of the wavelength-dependent photoreactivity of trans-urocanic acid

K M Hanson et al. Photochem Photobiol. 1998 May.

Abstract

Two-color, pulsed-laser photoacoustic calorimetry is used to distinguish between multiple rotamer or electronic state contributions to the absorption spectrum of the epidermal chromophore trans-urocanic acid. The data definitively show that the wavelength-dependent photochemistry of trans-urocanic acid results from the presence of two distinct, weakly coupled electronic states absorbing between 264 nm and 310 nm.

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