Electron spin resonance study of spin-trapped radicals from gamma irradiation of fructans

✍ Scribed by J. Triolet; J. Raffi; J-P. Agnel; C. Battesti; C. Thiery; P. Vincent

• Publisher: John Wiley and Sons
• Year: 1992
• Tongue: English
• Weight: 244 KB
• Volume: 30
• Category: Article
• ISSN: 0749-1581
• DOI: 10.1002/mrc.1260301105

✦ Synopsis

Abstract

Fructans (GF~n~) are important constituents of some plants. A study of the radiolysis of fructans in solution was performed using the spin‐trapping method. Electron spin resonance, combined with high‐performance liquid chromatography and followed by spectral analysis with the simulation program Voyons, showed three main trapped radical species in fructans GF~2~ to GF~4~. Similar trapped radical species have already been identified in irradiated sucrose using the same experimental methods, and their structures have been established. A study of the individual contribution of each radical to the global spectra of fructans confirms previous results on the localization of the unpaired electron; the broadening of the radical line widths with the increase of the fructan chain length also shows that radical formation occurs without depolymerization of the parent oligomer. Sucrose therefore provides a good model for a radiolysis study of fructans, at least for low n values.