Zeolites at high pressure: A review

Gatta, G. Diego; Lee, Yong Jae

doi:10.1180/minmag.2014.078.2.04

Cited by 101 publications

(124 citation statements)

References 135 publications

(244 reference statements)

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“…The compressibility of HS-MOR in m.e.w. can be compared to that of the synthetic Na-MOR studied by Gatta and Lee 54 using the same PTM. HS-MOR has a lower compressibility of up to about 2.8 GPa (DV HS-MOR = À2.40% and DV Na-MOR = À4.60%) and, in contrast, is more compressible at higher P (DV HS-MOR = À5.48% and DV Na-MOR = À4.83% in the 2.8-5.5 GPa range).…”

Section: Structural Deformations Induced By Penetrating Ptmmentioning

confidence: 99%

“…These data indicate an increase in ellipticity of these rings, due to the shortening of their shorter diameters aligned along the b-axis (Table 2). A strong anisotropic elastic behavior of a, b, and c axes (with b 4 c 4 a) was also reported for Na-MOR compressed in m.e.w., 54 whose anisotropic compression was interpreted on the basis of the MOR HT-structural behavior. 52 It was argued that under hydrostatic compression the structure reacts by increasing the original ellipticity of the channels.…”

Section: Structural Deformations Induced By Non-penetrating Ptmmentioning

confidence: 99%

“…However, the lack of structural refinements prevented the unambiguous description of the P-induced effects at the atomic level. 54 A further HP study performed on the same Na-mordenite sample by in situ single-crystal synchrotron XRD, using a 4 : 1 methanol : ethanol mixture as PTM, showed a phase transition from a C-centered to a primitive space group: possibly Pbnm, Pbnn or Pbn2 1 -probably displacive in character -between 1.68(7) and 2.70(8) GPa. 55 The structural refinements enabled the description of the deformation mechanisms in the low-P regime: bulk compression is greatly accommodated by increasing the ellipticity of the large 12-membered ring channels running along [001].…”

Section: Introductionmentioning

confidence: 99%

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Pressure-induced penetration of guest molecules in high-silica zeolites: the case of mordenite

Arletti

Leardini

Vezzalini

et al. 2015

Phys. Chem. Chem. Phys.

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A synthetic high-silica mordenite (HS-MOR) has been compressed in both non-penetrating (silicone oil, s.o.) and penetrating [methanol : ethanol : water (16 : 3 : 1) (m.e.w.), water : ethanol (3 : 1) (w.e.), and ethylene glycol (e.gl.)] pressure transmitting media (PTM). In situ high-pressure (HP) synchrotron X-ray powder diffraction (XRPD) experiments allowed the unit cell parameters to be followed up to 1.6, 1.8, 8.4, and 6.7 GPa in s.o., w.e., m.e.w., and e.gl., respectively. Moreover, e.gl. was also used as a PTM in in situ HP Raman and ex situ IR experiments. The structural refinement of HS-MOR compressed in e.gl.at 0.1 GPa -the lowest investigated pressure -revealed the presence of 3.5 ethylene glycol molecules per unit cell. The infrared spectrum of the recovered sample, after compression to 1 GPa, is consistent with the insertion of ethylene glycol molecules in the pores. XRPD and Raman spectroscopy experiments performed under pressure indicated the insertion of a small number of guest molecules. Ethylene glycol is partially retained inside mordenite upon pressure release. A symmetry lowering was observed in s.o. above 0.8 GPa, while above 1.6 GPa the patterns indicated a rapid loss of long range order. From ambient pressure (P amb ) to 1.6 GPa, a high cell volume contraction (DV = À9.5%) was determined. The patterns collected with penetrating PTM suggested the penetration of guest molecules into the porous host matrix, starting from a very low P regime. The entrapment of PTM molecules inside micropores contributes to the stiffening of the structure and, as a consequence, to the decrease of the compressibility with respect to that measured in s.o. From the structural point of view, HS-MOR reacts to compression and to the penetration of different guest species with appropriate framework deformations. Interestingly, ethylene glycol is partially retained inside mordenite upon pressure release, which is of importance for potential application of this composite material.

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Section: Structural Deformations Induced By Penetrating Ptmmentioning

confidence: 99%

Section: Structural Deformations Induced By Non-penetrating Ptmmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Pressure-induced penetration of guest molecules in high-silica zeolites: the case of mordenite

Arletti

Leardini

Vezzalini

et al. 2015

Phys. Chem. Chem. Phys.

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“…The different pressure response of the composites according to the dye loading is a consequence of the stiffening/template effects of the extra framework content, already observed in several high-pressure studies on zeolites and zeolite-based materials (see, e.g., Refs. [62,63,66,77,81,139,[169][170][171]). …”

Section: Structure Of the Zl/15fl Composite From First-principles Momentioning

confidence: 99%

Unravelling the High-Pressure Behaviour of Dye-Zeolite L Hybrid Materials

et al. 2018

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Self-assembly of chromophores nanoconfined in porous materials such as zeolite L has led to technologically relevant host-guest systems exploited in solar energy harvesting, photonics, nanodiagnostics and information technology. The response of these hybrid materials to compression, which would be crucial to enhance their application range, has never been explored to date. By a joint high-pressure in situ synchrotron X-ray powder diffraction and ab initio molecular dynamics approach, herein we unravel the high-pressure behaviour of hybrid composites of zeolite L with fluorenone dye. High-pressure experiments were performed up to 6 GPa using non-penetrating pressure transmitting media to study the effect of dye loading on the structural properties of the materials under compression. Computational modelling provided molecular-level insight on the response to compression of the confined dye assemblies, evidencing a pressure-induced strengthening of the interaction between the fluorenone carbonyl group and zeolite L potassium cations. Our results reveal an impressive stability of the fluorenone-zeolite L composites at GPa pressures. The remarkable resilience of the supramolecular organization of dye molecules hyperconfined in zeolite L channels may open the way to the realization of optical devices able to maintain their functionality under extreme conditions.

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“…In the past decade MOFs have sparked an international frenzy of research activity. Porous framework materials have been widely investigated by highpressure crystallography: zeolites have been recently reviewed (Gatta & Lee, 2014) and a review on the subject of 'MOFs under high pressure' by S. A. Moggach will appear later in 2015 as a feature article in Acta Crystallographic Section B. In a very recent perspective in Chemistry of Materials, Coudert (2015) provides an inspiring overview of porous and non-porous 'stimuli-responsive' framework materials, i.e.…”

mentioning

confidence: 99%

Probing the structure of framework materials by high pressure and the example of a magnetic, non-porous coordination polymer

Fabbiani

2015

Acta Crystallogr Sect B

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Nestled between the modest pressures employed to study protein folding (a few hundred megapascals) and the very high pressures obtained in shock-wave experiments (in the order of terapascals), a vast pressure scale can be explored experimentally and computationally in the physical and life sciences. Pressure is a powerful thermodynamic variable that enables the structure, bonding and reactivity of matter to be altered. In materials science it has become an indispensable research tool in the quest for novel functional materials. Examples include the target synthesis of new classes of materials with unique physical properties, see for instance the recently reported ultra-thin 'diamond nanothreads' obtained by decompressing benzene from 20 GPa to ambient pressure (Fitzgibbons et al., 2015). Materials scientists can exploit the effectiveness of pressure for probing and tuning structural, mechanical, electronic, magnetic and vibrational properties of materials in situ; crystallography plays a crucial role here, enabling on one hand the unravelling of structural phenomena through a better understanding of interactions, and on the other hand the derivation of structure-property relationships.Crystalline framework materials have long established themselves as the subject of intense interdisciplinary research activity; several classification systems and topological descriptors exist and the terminology found in the literature is rich and varied. In the simple and somewhat arbitrary view of this author, these materials can be divided into two main classes based on property, namely materials that exhibit porosity and those that do not. Porosity allows for potential applications in, inter alia, energy storage, catalysis, separation and capture technologies. Examples of industrially relevant framework materials displaying porosity include zeolites, at the forefront of the family of inorganic open-framework materials (Cheetham et al., 1999), and metal-organic frameworks (MOFs), which in the literature appear under the heading of hybrid inorganic organic framework materials (Cheetham et al., 2006) and, following the preferred definition by IUPAC (Batten et al., 2012(Batten et al., , 2013, under the heading of coordination networks, a subclass of coordination polymers. In the past decade MOFs have sparked an international frenzy of research activity. Porous framework materials have been widely investigated by highpressure crystallography: zeolites have been recently reviewed (Gatta & Lee, 2014) and a review on the subject of 'MOFs under high pressure' by S. A. Moggach will appear later in 2015 as a feature article in Acta Crystallographic Section B. In a very recent perspective in Chemistry of Materials, Coudert (2015) provides an inspiring overview of porous and non-porous 'stimuli-responsive' framework materials, i.e. those framework materials that by virtue of their flexibility undergo marked structural changes ('changes of large amplitude') in response to external stimuli such as pressure, temperature or light.High-pressur...

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Zeolites at high pressure: A review

Cited by 101 publications

References 135 publications

Pressure-induced penetration of guest molecules in high-silica zeolites: the case of mordenite

Pressure-induced penetration of guest molecules in high-silica zeolites: the case of mordenite

Unravelling the High-Pressure Behaviour of Dye-Zeolite L Hybrid Materials

Probing the structure of framework materials by high pressure and the example of a magnetic, non-porous coordination polymer

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