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Materials 2018, 11(8), 1416; https://doi.org/10.3390/ma11081416

Nuclear Magnetic Resonance Spectroscopy for In Situ Monitoring of Porous Materials Formation under Hydrothermal Conditions

Institut Lavoisier de Versailles, CNRS, UVSQ, Université Paris-Saclay, 45 av. des Etats-Unis, 78330 Versailles, France
Received: 30 July 2018 / Revised: 7 August 2018 / Accepted: 10 August 2018 / Published: 12 August 2018
(This article belongs to the Special Issue Novel In Situ Synthesis of Advanced Functional Materials)
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Abstract

The employment of nuclear magnetic resonance (NMR) spectroscopy for studying crystalline porous materials formation is reviewed in the context of the development of in situ methodologies for the observation of the real synthesis medium, with the aim of unraveling the nucleation and growth processes mechanism. Both liquid and solid state NMR techniques are considered to probe the local environment at molecular level of the precursor species either soluble in the liquid phase or present in the reactive gel. Because the mass transport between the liquid and solid components of the heterogeneous system plays a key role in the synthesis course, the two methods provide unique insights and are complementary. Recent technological advances for hydrothermal conditions NMR are detailed and their applications to zeolite and related materials crystallization are illustrated. Achievements in the field are exemplified with some representative studies of relevance to zeolites, aluminophosphate zeotypes, and metal-organic frameworks. View Full-Text
Keywords: NMR spectroscopy; zeolites; zeotypes; metal-organic frameworks; aluminophosphates; aluminosilicates; synthesis precursors; nucleation and growth; crystallization; mechanism NMR spectroscopy; zeolites; zeotypes; metal-organic frameworks; aluminophosphates; aluminosilicates; synthesis precursors; nucleation and growth; crystallization; mechanism
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Haouas, M. Nuclear Magnetic Resonance Spectroscopy for In Situ Monitoring of Porous Materials Formation under Hydrothermal Conditions. Materials 2018, 11, 1416.

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