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The origin of the wavelength-dependent photoreactivity of trans-urocanic acid
1Department of Chemistry and Biochemistry, University of California at San Diego, La Jolla, USA.
Photochemistry and Photobiology
|June 5, 1998
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.