Investigation of molecular mobility and exchange of n-hexane and water in silicalite-1 by 2D 1H NMR relaxometry

Molecular mobility and exchange of adsorbed fluid in porous media of silicalite-1 were studied by two-dimensional nuclear magnetic resonance (NMR) techniques in fully and partly saturated samples. Three porous volumes were determined in silicalite-1 where n-hexane and water molecules are adsorbed: i...

Full description

Saved in:

Bibliographic Details
Published in:	Magnetic resonance in solids Vol. 20; no. 1; p. 18102
Main Authors:	Gizatullin, B I, Savinkov, A V, Shipunov, T V, Melnikova, D L, Doroginitzky, M M, Skirda, V D
Format:	Journal Article
Language:	English
Published:	Kazan Kazanskii (Privolzhskii) Federalnyi Universitet / Kazan (Volga Region) Federal University 01-04-2018 Kazan Federal University
Subjects:	Exchanging molecular exchange NMR Nuclear magnetic resonance Porous media Self diffusion Silicalite silicalite-1 T1-T2 and T2-T2 correlations Water chemistry
Online Access:	Get full text
Tags:	Add Tag No Tags, Be the first to tag this record!

Description
Summary:	Molecular mobility and exchange of adsorbed fluid in porous media of silicalite-1 were studied by two-dimensional nuclear magnetic resonance (NMR) techniques in fully and partly saturated samples. Three porous volumes were determined in silicalite-1 where n-hexane and water molecules are adsorbed: intracrystallite channels, mesopores and intercrystallite space. The molecular exchange between all porous volumes was observed and typical exchange times were estimated for n-hexane and water. Using the exchange times the self-diffusion coefficients were estimated as D ~ 1.11×10−10 for n-hexane and D ~ 6.67×10−11 m2/s for water in fully saturated silicalite-1 and found in a good agreement with literature data.
ISSN:	2072-5981