Large Breathing Effect Induced by Water Sorption in the Exceptionally Stable Nonporous Non-MOF Crystalline Material

2021 ◽  
Author(s):  
Michał Magott ◽  
Bartłomiej Gaweł ◽  
Marcin Sarewicz ◽  
Mateusz Reczyński ◽  
Karolina Ogorzały ◽  
...  
Keyword(s):  
Water Sorption ◽  
Sorption Process ◽  
Crystalline Material ◽  
Sorption Properties ◽  
Complete Understanding ◽  
Prussian Blue Analogs ◽  
Epr Signal ◽  
Crystal Phases ◽  
Breathing Mechanism

We report a non-MOF crystalline material {[Mn(imH)]2[Mo(CN)8]}n (imH = imidazole) with exceptional water sorption properties and a very large breathing effect accompanied by an outstanding stability and cyclability – properties that are absolutely unique for this class of compounds (Prussian Blue Analogs). Some previously published PBAs indeed show some sorption properties, but their cyclability is extremely limited - usually 1-3 cycles - followed by significant decomposition/amorphization. Our compound can be cycled more than 50 times without any fatigue and the sorption/desorption proceeds through four different crystal phases, which we have fully characterized structurally enabling the complete understanding of the sorption and breathing mechanism in this material - an achievement rarely reported for MOFs or PBAs. <br>The unique structure of {[Mn(imH)]2[Mo(CN)8]}n enables very strong coupling of its exceptional water sorption performance with the magnetic and photomagnetic properties of the framework, e.g. the sorption process can be followed by in-situ EPR spectroscopy with huge changes in the EPR signal intensity depending on the hydration level.<br><br>

scholarly journals Large Breathing Effect Induced by Water Sorption in the Exceptionally Stable Nonporous Non-MOF Crystalline Material

2021 ◽  
Author(s):  
Michał Magott ◽  
Bartłomiej Gaweł ◽  
Marcin Sarewicz ◽  
Mateusz Reczyński ◽  
Karolina Ogorzały ◽  
...  
Keyword(s):  
Water Sorption ◽  
Sorption Process ◽  
Crystalline Material ◽  
Sorption Properties ◽  
Complete Understanding ◽  
Prussian Blue Analogs ◽  
Epr Signal ◽  
Crystal Phases ◽  
Breathing Mechanism

We report a non-MOF crystalline material {[Mn(imH)]2[Mo(CN)8]}n (imH = imidazole) with exceptional water sorption properties and a very large breathing effect accompanied by an outstanding stability and cyclability – properties that are absolutely unique for this class of compounds (Prussian Blue Analogs). Some previously published PBAs indeed show some sorption properties, but their cyclability is extremely limited - usually 1-3 cycles - followed by significant decomposition/amorphization. Our compound can be cycled more than 50 times without any fatigue and the sorption/desorption proceeds through four different crystal phases, which we have fully characterized structurally enabling the complete understanding of the sorption and breathing mechanism in this material - an achievement rarely reported for MOFs or PBAs. <br>The unique structure of {[Mn(imH)]2[Mo(CN)8]}n enables very strong coupling of its exceptional water sorption performance with the magnetic and photomagnetic properties of the framework, e.g. the sorption process can be followed by in-situ EPR spectroscopy with huge changes in the EPR signal intensity depending on the hydration level.<br><br>

scholarly journals Large breathing effect induced by water sorption in a remarkably stable nonporous cyanide-bridged coordination polymer

2021 ◽  
Author(s):  
Michal Magott ◽  
Bartłomiej A. Gaweł ◽  
Marcin Sarewicz ◽  
Mateusz Reczyński ◽  
Karolina Ogorzały ◽  
...  
Keyword(s):  
Coordination Polymer ◽  
Porous Materials ◽  
Prussian Blue ◽  
Water Sorption ◽  
Metal Organic Frameworks ◽  
Cutting Edge ◽  
Sorption Properties ◽  
Metal Organic ◽  
Prussian Blue Analogs

While metal-organic frameworks (MOFs) are at the forefront of cutting-edge porous materials, extraordinary sorption properties can also be observed in Prussian Blue Analogs (PBAs) and related materials comprising extremely short...

Compositional, thermal and water sorption properties of wheat flour: comparing wild-relatives v/s elite wheat varieties used in current plant breeding

2021 ◽  
Author(s):  
Deepa Agarwal ◽  
William MacNaughtan ◽  
Julie King ◽  
Tim J. Foster
Keyword(s):  
Plant Breeding ◽  
Wheat Flour ◽  
Water Sorption ◽  
Wild Relatives ◽  
Sorption Properties ◽  
Wheat Cultivars ◽  
Wheat Varieties ◽  
Functional Differences ◽  
Water Sorption Properties

This research investigate the structural and functional differences between four main wheat cultivars in comparison to the wild relatives of wheat. “Wheat image from www.freepik.com.”

Degradation of β-carotene in amorphous polymer matrices. Effect of water sorption properties and physical state

2011 ◽  
Vol 91 (14) ◽  
pp. 2587-2593 ◽  
Author(s):  
Ximena A Ramoneda ◽  
Peggy A Ponce-Cevallos ◽  
María del Pilar Buera ◽  
Beatriz E Elizalde
Keyword(s):  
Water Sorption ◽  
Physical State ◽  
Amorphous Polymer ◽  
Polymer Matrices ◽  
Sorption Properties ◽  
Effect Of Water ◽  
Water Sorption Properties ◽  
Β Carotene

Sorption of Water, Ammonia, Ethyl Chloride, and Methane on Na—X Zeolite and Associated Framework Distortion

1974 ◽  
Vol 52 (22) ◽  
pp. 3699-3706 ◽  
Author(s):  
D. L. Rimmer ◽  
R. McIntosh
Keyword(s):  
Water Sorption ◽  
Room Temperature ◽  
Sorption Isotherms ◽  
Length Change ◽  
Sorption Process ◽  
Ethyl Chloride ◽  
Two Dimensional ◽  
X Zeolite ◽  
Methane Sorption ◽  
Multilayer Formation

Length change and sorption isotherms have been determined for water, ammonia, ethyl chloride, and methane on compacted samples of zeolite NaX. Methane sorption at 0 °C and ethyl chloride sorption at −10°C were accompanied by little or no framework distortion as monitored by length change measurements; sorption of ammonia in the temperature range −50 to −70 °C produced more appreciable distortion; and water sorption at room temperature caused large changes. In each case the framework distortion was correlated with different stages in the sorption process. The sorption isotherms for the ammonia/NaX system indicated the possibility at high uptakes of two-dimensional condensation or multilayer formation. The critical temperature for two-dimensional condensation would be −70 °C.

scholarly journals Water sorption properties of HM-pectin and liposomes intended to alleviate dry mouth

2016 ◽  
Vol 506 (1-2) ◽  
pp. 201-206 ◽  
Author(s):  
Małgorzata I. Adamczak ◽  
Ørjan G. Martinsen ◽  
Gro Smistad ◽  
Marianne Hiorth
Keyword(s):  
Water Sorption ◽  
Sorption Properties ◽  
Dry Mouth ◽  
Water Sorption Properties

CHANGES IN THE VANADIUM MIGRATION FORMS ON GEOCHEMICAL BARRIERS IN THE RIVER-SEA MIXING ZONES

2021 ◽  
Author(s):  
Victoria Khoroshevskaya
Keyword(s):  
Software Package ◽  
Sorption Process ◽  
Biologically Active ◽  
Software Systems ◽  
River Waters ◽  
Geochemical Barriers ◽  
Physicochemical Processes ◽  
Estuarine Zone ◽  
Associative Models

The article is devoted to the study of vanadium, a metal capable of stimulating the growth of phytoplankton in situ and has the greatest biological activity in dissolved form. The pattern of an increase in the concentration of vanadium dissolved forms in the mixing zones during the transition from river waters to seawaters is known. In this article, we examine the behavior, ratio and change in the concentrations of vanadium dissolved and suspended forms during the passage of geochemical barriers. The estuarine zone of the Razdolnaya River–Amur Bay (Sea of Japan) is considered as "river-sea" mixing zone. Modelling of physicochemical processes was carried out using the Selector-S and MINTEQA2/PRODEFA2 software systems. Ion-associative models of sea and river water were built and the modelling of the process of their mixing was carried out using the Selector-S software package. The sorption process was simulated using the MINTEQA2/PRODEFA2 software package. The results of modelling physicochemical processes occurring at geochemical barriers help to understand the reasons for changes in concentrations, both total vanadium and biologically active dissolved vanadium forms, during the passage of geochemical barriers in the "river-sea" mixing zones. The results showed that there is a change in the dissolved forms of vanadium migration, their transformation and an increase in the concentration of dissolved forms of vanadium at the geochemical barrier

scholarly journals Unraveling the Guest-Induced Switchability in the Metal-Organic Framework DUT-13(Zn)

2021 ◽  
Author(s):  
Bodo Felsner ◽  
Volodymyr Bon ◽  
Jack D. Evans ◽  
Friedrich Schwotzer ◽  
Ronny Grünker ◽  
...  
Keyword(s):  
Metal Organic Framework ◽  
Conformational Isomerism ◽  
Hysteresis Width ◽  
Size Dependent ◽  
Semiempirical Approach ◽  
Contraction Mechanism ◽  
Metal Organic ◽  
Wide Hysteresis ◽  
Breathing Mechanism

A guest-induced flexibility in the framework DUT-13 was investigated in situ to analyze the breathing mechanism upon physisorption of nitrogen (77 K) and n-butane (273 K). The crystal structure of cp phase, solved from PXRD data using the computation-assisted semiempirical approach, shows two times smaller pore volume, compared to the op phase, which is consistent with the corresponding isotherms. The contraction mechanism is mainly based on the conformational isomerism of the benztb4- linker, which transforms from a staggered conformation in op phase to a more eclipsed in cp phase, leading to the contraction of the larger pore. A nearly complete op → cp → op transition was observed in the case of n-butane adsorption at 273 K, while in case of weakly interacting nitrogen molecules a portion of the sample remains in the op phase in the entire pressure range. Apparently, in case of DUT-13 the contraction is crystallite size-dependent, similarly as in a number of other switchable MOFs, which should be investigated more in detail in the future. Methane adsorption at varying temperatures showed a wide hysteresis at the temperatures between 111 K and 140 K. The hysteresis width decreases until it disappears completely at 170 K leading to a reversible isotherm, typical for rigid frameworks. The fact that breathing is observed in a broader temperature range in comparison to DUT‑49 demonstrates that thermodynamics and kinetics favour the DUT-13 contraction. Linker and hinges in DUT-13 are not stiff enough to support the metastable states required for NGA.

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