Retracted Article: Insight into the reversible structural crystalline-state transformation from MIL-53(Al) to MIL-68(Al)

Perea-Cachero, Adelaida; Romero, Enrique; Téllez, Carlos; Coronas, Joaquı́n

doi:10.1039/c7ce02034a

Cited by 10 publications

(5 citation statements)

References 37 publications

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“…The morphological transformation, from hexagonal needle shape to rhombic block shape, can be clearly observed in the corresponding SEM images (figure 2a,b). The analogous crystalline-state transformation between MIL-53(Al) and MIL-68(Al) was reported by Perea-Cachero and co-workers [20]. The transformation mechanism is regarded as the exchange or removal of guest molecules from the pores.…”

Section: Structure Transformation Analysissupporting

confidence: 73%

“…units) intensity (arb. units) 20 30 analogous structural transformation from MIL-68(In) to QMOF-2, and verified that MIL-68(In) is an initial kinetic product and QMOF-2 is a final thermodynamic product of In 3þ with an excess amount of H 2 BDC [25]. To verify the tenability of this conclusion in In 3þ and H 2 BDC_NH 2 system, the amount of the ligand was continuously increased to M : L ¼ 1 : 6, and the reaction time was prolonged to 24 h. The PXRD result validates that exclusive QMOF-2 is formed.…”

Section: Structure Transformation Analysismentioning

confidence: 99%

“…But, related to MIL-type materials, some interesting structural transformations have been reported due to different important factors, such as pH, time, temperature and guest molecules. Perea-Cachero et al described a method for the reversible crystalline transformation between MIL-53(Al) and MIL-68(Al), which had higher thermal stability and crystallinity than the as-synthesized MIL-68(Al) [20]. Carson et al reported topological isomers MIL-101(V) and MIL-88B(V) converted into MIL-47(V) by a thermal treatment (2008C) [21].…”

Section: Introductionmentioning

confidence: 99%

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Impact of the functionalization onto structure transformation and gas adsorption of MIL-68(In)

et al. 2018

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A series of functionalization –NH2, –Br and –NO2 has been performed on MIL-68(In) material in order to improve the porosity features of the pristine material. The functional groups grafted onto the ligand and the molar ratios of the ingredient indicate a profound influence on product formation. With the incremental amount of metal source, product structures undergo the transformation from MIL-68 to MIL-53 or QMOF-2. The situation is different depending on the variation of the ligands. Gas (N2, Ar, H2 and CO2) adsorption–desorption isotherms were systematically investigated to explore the impact of the functionalization on the porous prototypical framework. Comparison of adsorption behaviour of N2 and Ar indicates that the polar molecule exhibits striking interaction to N2 molecule, which has a considerable quadrupole moment. Therefore, as a probe molecule, Ar with no quadrupole moment is more suitable to characterize the surface area with the polar groups. Meanwhile, Ar adsorption result confirms that the negative influence on the surface area stems from the size of the substituting groups. The uptake of H2 and CO2 indicates that the introduction of appropriate polar organic groups can effectively enhance the adsorption enthalpy of relative gases and improve the gas adsorption capacity apparently at low pressure. The introduction of –NO2 is in favour of improving the H2 adsorption capacity, while the grafted –NH2 groups can most effectively enhance the CO2 adsorption capacity.

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Section: Structure Transformation Analysissupporting

confidence: 73%

Section: Structure Transformation Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Impact of the functionalization onto structure transformation and gas adsorption of MIL-68(In)

et al. 2018

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“…In the past two decades, coordination polymers and metal‐organic supramolecular compounds have gained tremendous attention not only for their fascinating structures and new topological prototypes, but also for their potential applications as functional materials in photoluminescence, adsorption, separation, ion exchange, magnetism and catalysis . To date, a large number of metal‐organic compounds with various architectures and good properties have been afforded based on the self‐assembly of appropriate metal ions and organic ligands .…”

Section: Crystallographic Data and Refinement Parameter Formentioning

confidence: 99%

A Unique Five‐Fold Interpenetrating Framework with the dmc Topology that is Supported by Extensive O–H···O Hydrogen Bonds

Wang

Deng

2019

Zeitschrift anorg allge chemie

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A unique supramolecular framework, [Zn 4 (H 2 O) 2 (2,5tdc) 4 (3,3Ј-bpe) 3 ] n (1), was prepared by the self-assembly of Zn(NO 3 ) 2 ·6H 2 O, 2,5-thiophenedicarboxylic acid (2,5-H 2 tdc), and 1,2-bis(3-pyridyl)-ethene (3,3Ј-bpe) under hydrothermal conditions. The coordination network of 1 can be simplified as a (3,4)-connected dmc framework with a point symbol (4·8 2 )(4·8 5 ). The void space of a single network of 1 is filled by mutual interpenetration of four crystallographically equivalent nets, generating a fivefold interpenetrating * Prof. F.-Z. Deng E-Mail: fanzdeng@yeah.net * Prof. J. He E-Mail: jiehe86@sina.cn [a]

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“…Work by Wright et al demonstrated the possibility to prepare Sc 3+ analogues, of Al‐MOFs in terms of reticular chemistry (e.g. MIL‐53, MIL‐68, MIL‐100, and MIL‐101 (M = Al, Sc)). In particular Al‐MIL‐53, which is built up from trans ‐corner sharing AlO 6 polyhedra connected to four adjacent chains by the linker molecules, has been intensively studied due to the breathing behavior and the associated changes in the pores sizes upon exchange or removal of guest molecules.…”

Section: Introductionmentioning

confidence: 99%

Water‐based Synthesis and Properties of a Scandium 1,4‐Naphthalenedicarboxylate

Rönfeldt

Reinsch

Grape

et al. 2020

Zeitschrift anorg allge chemie

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A new scandium naphthalenedicarboxylate with the framework composition [Sc2(1,4‐NDC)3] (H2‐1,4‐NDC = 1,4‐naphthalenedicarboxylic acid) was obtained under hydrothermal synthesis conditions. A structure model could be developed by a combination of 3D electron diffraction measurements and computationally assisted structure determination, which was further validated by a good agreement with the experimental powder X‐ray diffraction pattern. The structure consists of isolated ScO6 octahedra interconnected by the carboxylate groups of linker molecules to form chains. These chains are connected by the naphthalene‐moieties to form a three‐dimensional framework with square‐shaped pores and the organic group pointing into the pores. Although very similar synthesis conditions were chosen, [Sc2(1,4‐NDC)3] is not isostructural to aluminum naphthalenedicarboxylate [Al(OH)(1,4‐NDC)], which crystallizes in a MIL‐53 type structure. This can be traced back to the different inorganic building units that are observed. The compound was thoroughly characterized by elemental analysis, IR spectroscopy, sorption measurements, thermogravimetric analysis and luminescence measurements. [Sc2(1,4‐NDC)3] exhibits a high thermal stability and a ligand‐based blue luminescence in the solid state at room temperature.

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Retracted Article: Insight into the reversible structural crystalline-state transformation from MIL-53(Al) to MIL-68(Al)

Abstract: The reversible crystalline transformation from MIL-53(Al) into MIL-68(Al) was accomplished.

Cited by 10 publications

References 37 publications

Impact of the functionalization onto structure transformation and gas adsorption of MIL-68(In)

Impact of the functionalization onto structure transformation and gas adsorption of MIL-68(In)

A Unique Five‐Fold Interpenetrating Framework with the dmc Topology that is Supported by Extensive O–H···O Hydrogen Bonds

Water‐based Synthesis and Properties of a Scandium 1,4‐Naphthalenedicarboxylate

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