Proton Dipolar Spin–Lattice Relaxation in Nano-channels of Natrolite

• Published in: Applied magnetic resonance Vol. 47; no. 8; pp. 895 - 902
• Main Authors: Paczwa, M., Sapiga, A. A., Olszewski, M., Sergeev, N. A., Sapiga, A. V.
• Format: Journal Article
• Language: English
• Published: Vienna Springer Vienna 01.08.2016; Springer Nature B.V
• Subjects: Atoms and Molecules in Strong Fields; Diffusion; High temperature; Laser Matter Interaction; Low temperature; Magnetic fields; Nanochannels; NMR; Nuclear magnetic resonance; Organic Chemistry; Phase transitions; Physical Chemistry; Physics; Physics and Astronomy; Protons; Relaxation time; Sodium; Solid State Physics; Spectra; Spectroscopy/Spectrometry; Spin-lattice relaxation; Water chemistry; Zeolites; Nuclear Magnetic Resonance Spectrum; Lattice Relaxation Time; Rigid Lattice; Nuclear Magnetic Resonance; 27Al Nuclear Magnetic Resonance
• ISSN: 0937-9347; 1613-7507
• DOI: 10.1007/s00723-016-0805-5

The 1 H nuclear magnetic resonance (NMR) spectra and the dipolar spin–lattice relaxation time T 1D for 1 H in the natural natrolite (Na 2 Al 2 Si 3 O 10 ·2H 2 O) have been measured in the temperature range of 190–390 K. From the temperature transformations of 1 H NMR spectra, it follows that at T  > 300 K, the diffusion of water molecules along the nano-channels is observed. From experimental T 1D data, it follows that the 180° flip motion of the water molecules takes place in natrolite. At low temperature ( T  < 250 K), the dipolar interaction with paramagnetic impurities as a relaxation mechanism of 1 H nuclei becomes significant.