129Xenon NMR: Review of recent insights into porous materials

Weiland, Erika; Springuel‐Huet, Marie‐Anne; Nossov, Andreï; Gédéon, A.

doi:10.1016/j.micromeso.2015.11.025

Cited by 69 publications

(43 citation statements)

References 229 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…With NMR spectroscopy it is also possible to probe the uniformity and the connectivity of the pores. 129 Xe chemical shift is a good probe of the inner pore surfaces, because it spans a wide range, and is very sensitive to the shape and size of the void . 129 Xe NMR has been applied to gas hydrates and zeolites, but also to MOF's, organic zeolite analogs and mesoporous materials .…”

Section: Characterization Techniquesmentioning

confidence: 99%

Supramolecular Organization in Confined Nanospaces

Tabacchi

2018

ChemPhysChem

View full text Add to dashboard Cite

Empty spaces are abhorred by nature, which immediately rushes in to fill the void. Humans have learnt pretty well how to make ordered empty nanocontainers, and to get useful products out of them. When such an order is imparted to molecules, new properties may appear, often yielding advanced applications. This review illustrates how the organized void space inherently present in various materials: zeolites, clathrates, mesoporous silica/organosilica, and metal organic frameworks (MOF), for example, can be exploited to create confined, organized, and self-assembled supramolecular structures of low dimensionality. Features of the confining matrices relevant to organization are presented with special focus on molecular-level aspects. Selected examples of confined supramolecular assemblies - from small molecules to quantum dots or luminescent species - are aimed to show the complexity and potential of this approach. Natural confinement (minerals) and hyperconfinement (high pressure) provide further opportunities to understand and master the atomistic-level interactions governing supramolecular organization under nanospace restrictions.

show abstract

Section: Characterization Techniquesmentioning

confidence: 99%

Supramolecular Organization in Confined Nanospaces

Tabacchi

2018

ChemPhysChem

View full text Add to dashboard Cite

show abstract

“…[15] Interestingly the 31 P{ 1 H} SSNMR spectrum now shows sharp signals at d À23. [21] It also shows binding affinity in supramolecular cages, [22] oxide frameworks, [23] MOFs, [24] cryptophanes, [25] and porous coordinationcomplex salts; [26] and has been widely used as an NMR probe for the determination of pore size in framework materials, [27] due to the sensitivity of d( 129 Xe) to its local environment. This transformation is reversible,a nd when [20] V Xe /V cavity = 0.43).…”

mentioning

confidence: 99%

Reversible Encapsulation of Xenon and CH₂Cl₂ in a Solid‐State Molecular Organometallic Framework (Guest@SMOM)

2019

View full text Add to dashboard Cite

Reversible encapsulation of CH 2 Cl 2 or Xe in anonporous solid-state molecular organometallic framework of [Rh(Cy 2 PCH 2 PCy 2 )(NBD)][BAr F 4 ]occurs in single-crystal to single-crystal transformations.T hese processes are probed by solid-state NMR spectroscopy, including 129 Xe SSNMR. Noncovalent interactions with the -CF 3 groups,a nd hydrophobic channels formed, of [BAr F 4 ] À anions are shown to be important, and thus have similarity to the transport of substrates and products to and from the active site in metalloenzymes.Supportinginformation and the ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.

show abstract

“…Furthermore, nuclear spin polarization of 129 Xe can be enhanced by many orders of magnitude by spin-exchange optical pumping (SEOP) technique [13,28]. 129 Xe has also turned out to be an excellent probe for the properties of porous materials [29][30][31][32][33]. Here we describe the first gas phase ultrafast LNMR (diffusion-T2 correlation) experiments for hyperpolarized free xenon gas as well as xenon gas in a mesoporous material.…”

Section: Nmr (Lnmr)mentioning

confidence: 99%

Ultrafast Laplace NMR with hyperpolarized xenon gas

Mankinen

Hollenbach

Ahola

et al. 2018

Microporous and Mesoporous Materials

View full text Add to dashboard Cite

Laplace NMR, consisting of diffusion and relaxation experiments, provides detailed information about dynamics of fluids in porous materials. Recently, we showed that two-dimensional Laplace NMR experiments can be carried out with a single scan based on spatial encoding. The method shortens the experiment time by one to three orders of magnitude, and therefore it is called ultrafast Laplace NMR. Furthermore, the singlescan approach facilitates significantly the use of nuclear spin hyperpolarization for boosting the sensitivity of the experiment, because a laborious hyperpolarization procedure does not need to be repeated. Here, we push the limits of the ultrafast Laplace NMR method by applying it, for the first time, in the investigation of a gas phase substance, namely hyperpolarized xenon gas. We show that, regardless of the fast diffusion of gas, layer-like spatial encoding is feasible, and an ultrafast diffusion T2 relaxation correlation experiment reveals significantly different signals of free gas and gas adsorbed in a mesoporous controlled pore glass (CPG). The observed diffusion coefficients are many orders of magnitude larger than those detected earlier from liquid phase substances, emphasizing the extended application range of the method. The challenges in the methodology, caused by the fast diffusion, are also discussed.

show abstract

129Xenon NMR: Review of recent insights into porous materials

Cited by 69 publications

References 229 publications

Supramolecular Organization in Confined Nanospaces

Supramolecular Organization in Confined Nanospaces

Reversible Encapsulation of Xenon and CH₂Cl₂ in a Solid‐State Molecular Organometallic Framework (Guest@SMOM)

Ultrafast Laplace NMR with hyperpolarized xenon gas

Contact Info

Product

Resources

About

129Xenon NMR: Review of recent insights into porous materials

Cited by 69 publications

References 229 publications

Supramolecular Organization in Confined Nanospaces

Supramolecular Organization in Confined Nanospaces

Reversible Encapsulation of Xenon and CH2Cl2 in a Solid‐State Molecular Organometallic Framework (Guest@SMOM)

Ultrafast Laplace NMR with hyperpolarized xenon gas

Contact Info

Product

Resources

About

Reversible Encapsulation of Xenon and CH₂Cl₂ in a Solid‐State Molecular Organometallic Framework (Guest@SMOM)