New insights into the breathing phenomenon in ZIF-4

Gándara-Loe, Jesús; Missyul, Alexander; Fauth, François; Daemen, Luke L.; Cheng, Yongqiang; Ramirez‐Cuesta, Anibal J.; Ravikovitch, Peter I.; Silvestre-Albero, Joaquín

doi:10.1039/c8ta09713e

Cited by 17 publications

(34 citation statements)

References 15 publications

(30 reference statements)

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“…Developments in gas-handling systems have also paved the way to probe gate-opening and related network-breathing phenomena arising from the unique elastic properties of MOFs—see entries in Table 1 and Refs. [ 151 , 266 , 267 , 268 , 269 , 270 , 271 , 272 , 273 , 274 , 275 , 276 , 277 , 278 , 279 , 280 , 281 , 282 , 283 , 284 , 285 , 286 , 287 , 288 , 289 , 290 ].…”

Section: From Confined Polymers To Soft Supramolecular Frameworkmentioning

confidence: 99%

Dynamics & Spectroscopy with Neutrons—Recent Developments & Emerging Opportunities

2021

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This work provides an up-to-date overview of recent developments in neutron spectroscopic techniques and associated computational tools to interrogate the structural properties and dynamical behavior of complex and disordered materials, with a focus on those of a soft and polymeric nature. These have and continue to pave the way for new scientific opportunities simply thought unthinkable not so long ago, and have particularly benefited from advances in high-resolution, broadband techniques spanning energy transfers from the meV to the eV. Topical areas include the identification and robust assignment of low-energy modes underpinning functionality in soft solids and supramolecular frameworks, or the quantification in the laboratory of hitherto unexplored nuclear quantum effects dictating thermodynamic properties. In addition to novel classes of materials, we also discuss recent discoveries around water and its phase diagram, which continue to surprise us. All throughout, emphasis is placed on linking these ongoing and exciting experimental and computational developments to specific scientific questions in the context of the discovery of new materials for sustainable technologies.

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Section: From Confined Polymers To Soft Supramolecular Frameworkmentioning

confidence: 99%

Dynamics & Spectroscopy with Neutrons—Recent Developments & Emerging Opportunities

2021

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“…A variety of ZIFs have been reported in the literature including the commonly studied examples of ZIF-8, ZIF-7, and ZIF-4. , The framework topology of a ZIF depends upon the interplay between the nonbonding and the bonding interactions in the structure. Stronger nonbonded interactions favor the formation of high-density structures such as ZIF-7, while strong bonding interactions like bending and torsion tend to favor low-density structures such as the large pore form of ZIF-8 . These interaction energies are influenced by the choice of linker functionalization, which varies greatly among ZIFs .…”

Section: Introductionmentioning

confidence: 99%

“…The imidazolate rings can rotate about the nitrogen axis, causing the windows to open or close. As a result, like many other ZIFs, ZIF-4 can adsorb molecules with kinetic diameters larger than the PLD, such as n -alkanes and CO 2 . Gandara et al recently showed that the N 2 isotherm in ZIF-4 at 77 K shows multiple steps.…”

Section: Introductionmentioning

confidence: 99%

“…As a result, like many other ZIFs, ZIF-4 can adsorb molecules with kinetic diameters larger than the PLD, such as n -alkanes and CO 2 . Gandara et al recently showed that the N 2 isotherm in ZIF-4 at 77 K shows multiple steps. These steps correspond to phase transitions from a narrow pore structure to a high-temperature (HT) structure at 30 kPa and from the HT structure to a large pore structure at about 75 kPa.…”

Section: Introductionmentioning

confidence: 99%

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Molecular Siting of C1–C6 n-Alkanes in ZIF-4: A Hybrid Monte Carlo Study

Snurr

2021

J. Phys. Chem. C

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The zeolitic imidazolate framework ZIF-4 is a metal− organic framework made of tetrahedral Zn 2+ nodes connected by imidazolate ligands to form zeolite-like pores. ZIF-4 exhibits many interesting phenomena such as framework flexibility and phase transitions. Recently, the "window effect" has also been demonstrated experimentally in ZIF-4. The window effect refers to an unusual, nonmonotonic trend in the diffusivity of chain molecules in nanoporous materials. In ZIF-4, the diffusivities decrease with chain length from methane to n-butane but with n-pentane having a higher diffusivity than n-butane and n-hexane. This is hypothesized to be due to the difficulty of the longer chains (n-pentane, n-hexane) to coil up inside the cages, causing them to extend out of the cage through the flexible cage windows. As a result, the diffusion mechanisms could change as the chain length increases from n-butane to n-pentane. We investigate this possibility by simulating the adsorption of C1−C6 n-alkanes in ZIF-4 using hybrid Monte Carlo simulations and analyzing the adsorbed configurations for molecular siting differences among the n-alkanes from methane to n-hexane.

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“…ZIFs belong to MOFs microporous crystalline family and is the most primary of these structures because they have one un-substituted Imidazolate linkers. Pore size diameter of ZIF-4 is 0.21 nm windows with an orthorhombic spaces and cag network topology [25]. They have different application such as heterogeneous catalyze, gas separation and sensor because of their high chemical and thermal stability [26].…”

Section: Introductionmentioning

confidence: 99%

Fast, Simple and Sensitive Determination of Coumaric Acid in Fruit Juice Samples by Magnetite Nanoparticles‐zeolitic Imidazolate Framework Material

Şenocak

2020

Electroanalysis

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In this work, magnetic iron nanoparticle (Fe 3 O 4) was functionalized a zeolitic imidalozate framework (ZIF-4) material by co-precipitation process to provide a magnetic hybrid nanomaterial, viz. Fe 3 O 4 @ZIF-4. The structural characterization was performed different spectroscopic, thermal and microscopic techniques. Moreover, voltammetric sensor properties of Fe 3 O 4 @ZIF-4 nanohybrid material for determination of p-coumaric acid (CA) were performed by differential pulse (DPV) and cyclic voltammetry (CV). A reliable and selective electroanalytical method exhibited for the detection of CA. It was found that the deposition of Fe 3 O 4 @ZIF-4 nanohybrid on a glassy carbon electrode (GCE) brought about 2.3, 3.5 and 5.0 fold more sensitive than Fe 3 O 4 /GCE, ZIF-4/GCE and unmodified GCE responses to CA in Britton-Robinson (BÀ R) buffer solution (a pH of 4). The detection, quantification limits and linear range of CA were determined as 0.18, 0.60 μM and 0.50-12.00 μM. The stability, repeatability and selectivity of the suggested Fe 3 O 4 @ZIF-4 modified GCE sensor was fully investigated. In addition, an application of orange juices samples was performed on modified electrode for determination of CA, which was showed by a standard addition method with verifying of High Performance Liquid Chromatography (HPLC) analysis. Besides the ease of synthesis and low price, the suggested Fe 3 O 4 @ZIF-4/GCE sensor offers repeatability, selectivity, stability and easy to apply to real samples.

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New insights into the breathing phenomenon in ZIF-4

Cited by 17 publications

References 15 publications

Dynamics & Spectroscopy with Neutrons—Recent Developments & Emerging Opportunities

Dynamics & Spectroscopy with Neutrons—Recent Developments & Emerging Opportunities

Molecular Siting of C1–C6 n-Alkanes in ZIF-4: A Hybrid Monte Carlo Study

Fast, Simple and Sensitive Determination of Coumaric Acid in Fruit Juice Samples by Magnetite Nanoparticles‐zeolitic Imidazolate Framework Material

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