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Flash photolysis of N-acetyl-L-tryptophanamide; proton quenching of radical and electron production

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

Publisher: Elsevier Science
Year: 1976
Tongue: English
Weight: 416 KB
Volume: 42
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(76)80642-2

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✦ Synopsis

Proton quenching of fluorescence, radical and electron production in the flash photorysis of N-acetyl-L-tryptophanamide indicates these processes originate from a common state. An indole photolysis model consistent with these and carlier observations is suggested.

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Flash photolysis of N-acetyl-L-tryptopha

Flash photolysis of N-acetyl-L-tryptophanamide; evidence for radical production without hydrated electron formation

✍ R.F. Evans; C.A. Ghiron; W.A. Volkert; R.R. Kuntz; R. Santus; M. Bazin 📂 Article 📅 1976 🏛 Elsevier Science 🌐 English ⚖ 376 KB

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.

Flash photolysis of N-acetyl-L-tryptopha

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

✍ R.F. Evans; C.A. Ghiron; W.A. Volkert; R.R. Kuntz 📂 Article 📅 1976 🏛 Elsevier Science 🌐 English ⚖ 306 KB

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.