Identification of paramagnetic radicals in gamma-irradiated natural diatomite minerals by electron paramagnetic resonance


Koseoglu R. , köksal F., Çiftçi E., Akkurt M.

JOURNAL OF MOLECULAR STRUCTURE, cilt.733, ss.151-154, 2005 (SCI İndekslerine Giren Dergi) identifier

  • Cilt numarası: 733
  • Basım Tarihi: 2005
  • Doi Numarası: 10.1016/j.molstruc.2004.08.005
  • Dergi Adı: JOURNAL OF MOLECULAR STRUCTURE
  • Sayfa Sayıları: ss.151-154

Özet

In this study, gamma-irradiated natural diatomite minerals were investigated by electron paramagnetic resonance (EPR) spectroscopy at ambient temperature. The paramagnetic radicals produced by gamma-irradiation in natural diatomite minerals at ambient temperature were free radicals. These centers were found to be perfectly attributed to CH3, PO42-, CO2-, organic (probably, humic or fluvic acid), SO2- and SO3- observable at below 20 mW microwave power. The g values of all the paramagnetic centers were obtained, and some of their a values were reported. The results were found to be consistent with the existing literature data and theoretical predictions for similar paramagnetic centers. (C) 2004 Elsevier B.V. All rights reserved.