Pulse radiolysis of acryloyl-l-proline methyl ester in dilute aqueous solution

E. Takács, Á Sáfrány, L. Wojnárovits, F. Martellini, M. Yoshida, R. Katakai, S. S. Emmi, M. Carenza

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

The reactions of hydroxyl radical, hydrogen atom, and hydrated electron intermediates of water radiolysis with a hydrogel monomer, acryloyl-L-proline methyl ester, were studied by pulse radiolysis in dilute aqueous solutions. In reactions of OH and H, α-carboxyalkyl radicals form; they absorb the light with a maximum at 460-480 nm, εmax ≈ 1000 mol-1·dm3·cm-1. The electron adduct reversibly protonates, and the protonated form absorbs the light with λmax = 290 nm and εmax = 8000 mol-1·dm3·cm-1. In addition to the reversible protonation, there is also an irreversible protonation which produces also α-carboxyalkyl radicals. These radicals at low concentration (0.1-1 mmol·dm-3) and high dose/ pulse (10-100 Gy) decay in second-order self-termination reactions with 2k = 3 × 108 mol-1·dm3·s-1.

Original languageEnglish
Pages (from-to)1609-1619
Number of pages11
JournalJournal of Macromolecular Science - Pure and Applied Chemistry
Volume33
Issue number11
DOIs
Publication statusPublished - Jan 1 1996

ASJC Scopus subject areas

  • Ceramics and Composites
  • Chemistry(all)
  • Polymers and Plastics
  • Materials Chemistry

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