The origin of the wavelength-dependent photoreactivity of trans-urocanic acid.
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.
Hanson
K M
KM
Department of Chemistry and Biochemistry, University of California at San Diego, La Jolla, USA.
Simon
J D
JD
D002151:Calorimetry / Q000379:methods; D013056:Spectrophotometry, Ultraviolet; D014560:Urocanic Acid / Q000528:radiation effects*
D014560:Urocanic Acid