Z/E PHOTOISOMERIZATION OF UROCANIC ACID*

H. Morrison; D. Avnir; C. Bernasconi; G. Fagan

doi:10.1111/j.1751-1097.1980.tb04046.x

Z/E PHOTOISOMERIZATION OF UROCANIC ACID*

H. Morrison^*
, D. Avnir
, C. Bernasconi
, G. Fagan

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

76 Scopus citations

Abstract

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, φ_E→z= 0.52, φ_Z→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 E_T for UA is estimated to be approximately 55 kcal/mol.

Original language	English
Pages (from-to)	711-714
Number of pages	4
Journal	Photochemistry and Photobiology
Volume	32
Issue number	6
DOIs	https://doi.org/10.1111/j.1751-1097.1980.tb04046.x
State	Published - Dec 1980
Externally published	Yes

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title = "Z/E PHOTOISOMERIZATION OF UROCANIC ACID*",

abstract = "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.",

author = "H. Morrison and D. Avnir and C. Bernasconi and G. Fagan",

year = "1980",

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doi = "10.1111/j.1751-1097.1980.tb04046.x",

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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.

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JO - Photochemistry and Photobiology

JF - Photochemistry and Photobiology

IS - 6

ER -

Z/E PHOTOISOMERIZATION OF UROCANIC ACID*

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