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The Origin of the Wavelength‐Dependent Photoreactivity of Trans‐Urocanic Acid
Author(s) -
Hanson Kerry M.,
Simon John D.
Publication year - 1998
Publication title -
photochemistry and photobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.818
H-Index - 131
eISSN - 1751-1097
pISSN - 0031-8655
DOI - 10.1111/j.1751-1097.1998.tb09090.x
Subject(s) - urocanic acid , chemistry , wavelength , photochemistry , biochemistry , physics , amino acid , optoelectronics , histidine
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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