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- W2092628530 abstract "The calcination of H-mordenite or H-ZSM-5 mixtures with CuO results in the migration of copper(II) ions into zeolite channels. The Cu2+-ions which migrate from the outer surface of zeolite crystals are coordinated in the same positions as Cu2+-cations introduced by ion-exchange. The majority of Cu(II) is located in H-ZSM-5 channels as isolated, coordinatively unsaturated, covalent-bonded Cu2+-cations. The coordinative unsaturation of Cu2+-ions is confirmed by the strong influence of O2 adsorption on hyper-fine splitting (hfs) of e.s.r. spectra. The quantity of Cu2+-cations which may be introduced in H-ZSM-5 by the solid state reaction is related linearly to the Al3+ content in the zeolite lattice. The interaction of H-ZSM-5 with CuCl2, CuF2, Cu3(PO4)2 or Cu2S results in the migration of Cu(II) or Cu(I) ions in cationic positions of zeolite. So, the thermal stability of high-silica zeolite frameworks allows the introduction of some polyvalent ions in cationic positions by the solid state reaction." @default.
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- W2092628530 date "1986-05-01" @default.
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- W2092628530 title "Introduction of transition metal ions in cationic positions of high-silica zeolites by a solid state reaction. Interaction of copper compounds with H-mordenite or H-ZSM-5" @default.
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- W2092628530 doi "https://doi.org/10.1016/0144-2449(86)90044-8" @default.
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