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

R. Köseoglu; F. Köksal; E. Çiftci; M. Akkurt

doi:10.1016/j.molstruc.2004.08.005

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

R. Köseoglu, F. Köksal, E. Çiftci, M. Akkurt

Research output: Contribution to journal › Article › peer-review

12 Citations (Scopus)

Abstract

In this study, gamma-irradiated natural diatomite minerals were investigated by electron paramagnetic resonance (EPR) spectroscopy at ambient temperature. The paramagnetic radicals produced by γ-irradiation in natural diatomite minerals at ambient temperature were attributed to ĊH3, ṖO42-, ĊO2-, organic (probably, humic or fluvic acid), ṠO2- and ṠO3- free radicals. These centers were found to be perfectly 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.

Original language	English
Pages (from-to)	151-154
Number of pages	4
Journal	Journal of Molecular Structure
Volume	733
Issue number	1-3
DOIs	https://doi.org/10.1016/j.molstruc.2004.08.005
Publication status	Published - 3 Jan 2005
Externally published	Yes

Keywords

Diatomite
EPR
Free radicals
Gamma-irradiation

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10.1016/j.molstruc.2004.08.005

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title = "Identification of paramagnetic radicals in γ-irradiated natural diatomite minerals by electron paramagnetic resonance",

abstract = "In this study, gamma-irradiated natural diatomite minerals were investigated by electron paramagnetic resonance (EPR) spectroscopy at ambient temperature. The paramagnetic radicals produced by γ-irradiation in natural diatomite minerals at ambient temperature were attributed to ĊH3, ṖO42-, ĊO2-, organic (probably, humic or fluvic acid), ṠO2- and ṠO3- free radicals. These centers were found to be perfectly 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.",

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T1 - Identification of paramagnetic radicals in γ-irradiated natural diatomite minerals by electron paramagnetic resonance

AU - Köseoglu, R.

AU - Köksal, F.

AU - Çiftci, E.

AU - Akkurt, M.

PY - 2005/1/3

Y1 - 2005/1/3

N2 - In this study, gamma-irradiated natural diatomite minerals were investigated by electron paramagnetic resonance (EPR) spectroscopy at ambient temperature. The paramagnetic radicals produced by γ-irradiation in natural diatomite minerals at ambient temperature were attributed to ĊH3, ṖO42-, ĊO2-, organic (probably, humic or fluvic acid), ṠO2- and ṠO3- free radicals. These centers were found to be perfectly 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.

AB - In this study, gamma-irradiated natural diatomite minerals were investigated by electron paramagnetic resonance (EPR) spectroscopy at ambient temperature. The paramagnetic radicals produced by γ-irradiation in natural diatomite minerals at ambient temperature were attributed to ĊH3, ṖO42-, ĊO2-, organic (probably, humic or fluvic acid), ṠO2- and ṠO3- free radicals. These centers were found to be perfectly 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.

KW - Diatomite

KW - EPR

KW - Free radicals

KW - Gamma-irradiation

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DO - 10.1016/j.molstruc.2004.08.005

M3 - Article

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SN - 0022-2860

VL - 733

SP - 151

EP - 154

JO - Journal of Molecular Structure

JF - Journal of Molecular Structure

IS - 1-3

ER -

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

Abstract

Keywords

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