Electron paramagnetic resonance of organic and inorganic centers in γ-irradiated natural sepiolite minerals

Rahmi Köseoǧlu; Fevzi Köksal; Mehmet Akkurt; Emin Çiftçi

doi:10.1515/zna-2006-7-816

Electron paramagnetic resonance of organic and inorganic centers in γ-irradiated natural sepiolite minerals

Rahmi Köseoǧlu^*, Fevzi Köksal, Mehmet Akkurt, Emin Çiftçi

^*Corresponding author for this work

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

Abstract

Natural sepiolite minerals and their γ-irradiated forms were investigated by electron paramagnetic resonance (EPR) at room temperature and at 113 K. The EPR signals in powders of natural sepiolite were observed due to clusters of Fe³⁺ ions. The paramagnetic centers produced by γ-irradiation of natural sepiolite minerals were attributed to the ĊH₃ at room temperature and ṠO₂^- and ṠO₃^- radicals at 113 K. These centers were found to be perfectly observable above 20 mW microwave power. The g values of all paramagnetic centers have been measured and the A values of some of them have been reported. The results were consistent with the literature data for similar paramagnetic centers.

Original language	English
Pages (from-to)	413-417
Number of pages	5
Journal	Zeitschrift fur Naturforschung - Section A Journal of Physical Sciences
Volume	61
Issue number	7-8
DOIs	https://doi.org/10.1515/zna-2006-7-816
Publication status	Published - 2006
Externally published	Yes

Keywords

EPR
Paramagnetic Centers
Sepiolite Minerals
γ-Irradiation

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10.1515/zna-2006-7-816

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title = "Electron paramagnetic resonance of organic and inorganic centers in γ-irradiated natural sepiolite minerals",

abstract = "Natural sepiolite minerals and their γ-irradiated forms were investigated by electron paramagnetic resonance (EPR) at room temperature and at 113 K. The EPR signals in powders of natural sepiolite were observed due to clusters of Fe3+ ions. The paramagnetic centers produced by γ-irradiation of natural sepiolite minerals were attributed to the ĊH3 at room temperature and ṠO2- and ṠO3- radicals at 113 K. These centers were found to be perfectly observable above 20 mW microwave power. The g values of all paramagnetic centers have been measured and the A values of some of them have been reported. The results were consistent with the literature data for similar paramagnetic centers.",

keywords = "EPR, Paramagnetic Centers, Sepiolite Minerals, γ-Irradiation",

author = "Rahmi K{\"o}seoǧlu and Fevzi K{\"o}ksal and Mehmet Akkurt and Emin {\c C}ift{\c c}i",

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doi = "10.1515/zna-2006-7-816",

language = "English",

volume = "61",

pages = "413--417",

journal = "Zeitschrift fur Naturforschung - Section A Journal of Physical Sciences",

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T1 - Electron paramagnetic resonance of organic and inorganic centers in γ-irradiated natural sepiolite minerals

AU - Köseoǧlu, Rahmi

AU - Köksal, Fevzi

AU - Akkurt, Mehmet

AU - Çiftçi, Emin

PY - 2006

Y1 - 2006

N2 - Natural sepiolite minerals and their γ-irradiated forms were investigated by electron paramagnetic resonance (EPR) at room temperature and at 113 K. The EPR signals in powders of natural sepiolite were observed due to clusters of Fe3+ ions. The paramagnetic centers produced by γ-irradiation of natural sepiolite minerals were attributed to the ĊH3 at room temperature and ṠO2- and ṠO3- radicals at 113 K. These centers were found to be perfectly observable above 20 mW microwave power. The g values of all paramagnetic centers have been measured and the A values of some of them have been reported. The results were consistent with the literature data for similar paramagnetic centers.

AB - Natural sepiolite minerals and their γ-irradiated forms were investigated by electron paramagnetic resonance (EPR) at room temperature and at 113 K. The EPR signals in powders of natural sepiolite were observed due to clusters of Fe3+ ions. The paramagnetic centers produced by γ-irradiation of natural sepiolite minerals were attributed to the ĊH3 at room temperature and ṠO2- and ṠO3- radicals at 113 K. These centers were found to be perfectly observable above 20 mW microwave power. The g values of all paramagnetic centers have been measured and the A values of some of them have been reported. The results were consistent with the literature data for similar paramagnetic centers.

KW - EPR

KW - Paramagnetic Centers

KW - Sepiolite Minerals

KW - γ-Irradiation

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DO - 10.1515/zna-2006-7-816

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SN - 0932-0784

VL - 61

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JO - Zeitschrift fur Naturforschung - Section A Journal of Physical Sciences

JF - Zeitschrift fur Naturforschung - Section A Journal of Physical Sciences

IS - 7-8

ER -

Electron paramagnetic resonance of organic and inorganic centers in γ-irradiated natural sepiolite minerals

Abstract

Keywords

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