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Flash photolysis of N-acetyl-L-tryptophanamide; acid-base equilibrium of the radical transients

✍ Scribed by R.F. Evans; C.A. Ghiron; W.A. Volkert; R.R. Kuntz

Publisher: Elsevier Science
Year: 1976
Tongue: English
Weight: 306 KB
Volume: 42
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(76)80547-7

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✦ Synopsis

The transient with a A,, at 570 nm observed in the flash photolysis of Nacetyl-L-tryptophanamide is confirmed to be the positive radical This species 1s in rapid equilibrium with Its deprotonated form (hmax = 5 10 nm) with a pK of 4.3.

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Electron countmg methods show that approximately 50% of the neutral r2dlcals produced m the flash photolysis of N-acetyl-L-tryptophanamide (NATA) are not accompanied by hydrated electron formation. Thus, the rzeutral radical cannot or&ate solely from the photoionlzatlon reaction.