SENSITIZED PHOTOOXYGENATION ACCORDING TO TYPE I MECHANISM (RADICAL MECHANISM) — PART II. FLASH PHOTOLYSIS EXPERIMENTS
- 2 January 1972
- journal article
- Published by Wiley in Photochemistry and Photobiology
- Vol. 15 (1) , 25-32
- https://doi.org/10.1111/j.1751-1097.1972.tb06219.x
Abstract
Abstract— In order to gain further insight into the sensitized photooxygenation of the system thionine, allylthiourea, and oxygen, the influence of the leucothionine, which is formed during the photoreaction, was studied by flash photolysis. In the presence of leucothionine, additional thionine (Λobs= 598 nm) is reformed; i.e., leucothionine is oxidized to thionine by way of a semithionine intermediate (Λbs= 770 nm). This additional semithionine formation due to leucothionine is complete by 30 μsec after the flash. By varying the leucothionine concentration, the flash intensity and the pH it can be shown that the agent which oxidizes leucothionine to semithionine is identical to the agent which transforms semithionine to thionine.Keywords
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- Type II Photooxygenation Reactions in SolutionPublished by Wiley ,1968
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