Dynamic of water molecules in natrolite

• Autorzy: Paczwa M. , Sergeev N. A. , Olszewski M. , Sapiga A. A. , Sapiga A. V.
• Języki publikacji: EN

Abstrakty

EN

Molecular mobility of water molecules has been investigated in the natural zeolite natrolite (Na2Al2Si3O10 ·2H2O) by 1H NMR. Spin-lattice relaxation times in the laboratory and rotating frames (T1 and T1-) have been measured as a function of temperature for a polycrystalline sample. It has been shown that the spin-lattice relaxations times of 1H are governed by the translation motions of water molecules in the natrolite pores. From experimental T1 data it follows that at T > 286 K the diffusion of water molecules along channels parallel to the c axis is observed. From experimental T1 data it follows that at T > 250 K the diffusion of water molecules in transversal channels of natrolite is observed also. At low temperature (T < 250 K) the dipolar interaction with paramagnetic impurities (presumably with Fe3+ ions) become significant as a relaxation mechanism of 1H nuclei.

Słowa kluczowe

EN

zeolite; NMR; natrolite; water mobility

• Wydawca: Tomasz Mariusz Majka
• Czasopismo: Journal of Education and Technical Sciences
• Rocznik: 2015
• Tom: Vol. 2, nr 1
• Strony: 15--20
• Opis fizyczny: Bibliogr. 20 poz., rys., tab.

Twórcy

autor

Paczwa M.

• Institute of Physics, Department of Mathematical and Physics, University of Szczecin Wielkopolska str.-15, 70-451 Szczecin, Poland

autor

Sergeev N. A.

• Institute of Physics, Department of Mathematical and Physics, University of Szczecin Wielkopolska str.-15, 70-451 Szczecin, Poland

autor

Olszewski M.

• Institute of Physics, Department of Mathematical and Physics, University of Szczecin Wielkopolska str.-15, 70-451 Szczecin, Poland

autor

Sapiga A. A.

• V.I.Vernadsky Crimean Federal University, 295007 Simferopol, Crimea

autor

Sapiga A. V.

• V.I.Vernadsky Crimean Federal University, 295007 Simferopol, Crimea

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