TY - JOUR
T1 - Z/E PHOTOISOMERIZATION OF UROCANIC ACID*
AU - Morrison, H.
AU - Avnir, D.
AU - Bernasconi, C.
AU - Fagan, G.
PY - 1980/12
Y1 - 1980/12
N2 - The E ⇆ Z photoisomerization of the title compound (UA) (a naturally occurring sunscreen) has been studied in aqueous solution. At a UA concentration of 6mM and using 313nm excitation, φE→z= 0.52, φZ→E= 0.47 and the photostationary state is 34% E. Under these conditions, loss of UA is minimal. Low energy triplet quenchers fail to impede the isomerization, but the reaction can be induced by several triplet sensitizers. The ET for UA is estimated to be approximately 55 kcal/mol.
AB - The E ⇆ Z photoisomerization of the title compound (UA) (a naturally occurring sunscreen) has been studied in aqueous solution. At a UA concentration of 6mM and using 313nm excitation, φE→z= 0.52, φZ→E= 0.47 and the photostationary state is 34% E. Under these conditions, loss of UA is minimal. Low energy triplet quenchers fail to impede the isomerization, but the reaction can be induced by several triplet sensitizers. The ET for UA is estimated to be approximately 55 kcal/mol.
UR - http://www.scopus.com/inward/record.url?scp=84985478861&partnerID=8YFLogxK
U2 - 10.1111/j.1751-1097.1980.tb04046.x
DO - 10.1111/j.1751-1097.1980.tb04046.x
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AN - SCOPUS:84985478861
SN - 0031-8655
VL - 32
SP - 711
EP - 714
JO - Photochemistry and Photobiology
JF - Photochemistry and Photobiology
IS - 6
ER -