In this chapter we are concerned with the mechanisms of organic photochemical reactions. Two important features of mechanisms are the correlation of molecular structure with reactivity and the investigation and establishment of the details of the elementary steps involved in a photochemical process as *R proceeds to P. We shall be concerned with the experimental tools for characterizing the str...

The intramolecular photocycloaddition of aryl aldehydes containing allene side chains is a versatile reaction as it provides a rapid and efficient access to original complex structures such as 1,3,4-tetrahydro-1,4-epoxy-5-alkylidene-2-benzoxepines 2 and substituted 2-oxa-tricyclo[5.2.2.0] (1,5)undeca-4,8,10-triene-9-carbaldehydes 3. Novel polycyclic structures are characterized, and optimized s...

Photochemical processing of aqueous atmospheric brown carbon R. Zhao, A. K. Y. Lee, L. Huang, X. Li, F. Yang, and J. P. D. Abbatt Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, ON, Canada Atmospheric Science and Technology Directorate/Science and Technology Branch, Environment Canada, Toronto, Canada School of Chemistry and Environment, Beihang University, Beijin...