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Methyl radicals generated by ă-irradiation in the proton form of synthetic rho zeolite exposed to CH4 have been investigated by electron paramagnetic resonance (EPR) in the temperature range 110-370 K. Depending on the methane adsorption temperature two EPR spectra of oCH3 radicals were recorded. The isotropic quartet observed after CH4 adsorption at room temperature was assigned to oCH3 radicals...
Opisano podstawowe etapy radiolizy zachodzącej w polimerach pod wpływem promieniowania elektronowego oraz powstawanie wolnych rodników w polietylenie, polipropylenie i poli(tereftalanie etylenowym) po napromienieniu. Zaprezentowano widma rodników alkilowych, allilowych i nadtlenkowych rejestrowanych metodą EPR. Przeprowadzono badania czasu zaniku wolnych rodników oraz zmiany względnego ich stężenia...
Cationic silver clusters formed in l-irradiated Ag+-exchanged Linde 4A zeolite and isostructural synthetic ZK-4 zeolite with Si/ Al ratio of 1.2 and 2.4 have been studied by electron spin resonance (ESR) spectroscopy. Whereas dehydrated AgNa-A zeolite shows rem.arkable ability for stabilization of Ag(6)n+ clusters in AgNa-ZK-4 zeolites hexameric silver clusters are not formed at all. .In ZK-4 samples...
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