Assembly of two novel coordination polymers constructed from metal-organic framework and Keggin-template

Meng, Fan-Xia; Chen, Ya-Guang; Liu, Hongbo; Pang, Haijun; Shi, Decheng; Sun, Yu

doi:10.1016/j.molstruc.2006.10.054

Cited by 24 publications

(3 citation statements)

References 67 publications

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“…Single-crystal X-ray diffraction analysis reveals that the asymmetric unit of 1 is constructed from one [SiW 12 (2) Å, respectively, which are in the normal ranges and in close agreement with those described in the literature [37,38]. All the crystallographically unique Cu II ions (Cu1, Cu2, Cu3, and Cu4) exhibit distorted octahedral geometries.…”

supporting

confidence: 79%

A new 3D hybrid architecture containing Keggin-type tungstosilicate and Cu4(EGTA)2 metallamacrocyclic cation

Zhang

Chen

et al. 2011

Inorganic Chemistry Communications

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confidence: 79%

A new 3D hybrid architecture containing Keggin-type tungstosilicate and Cu4(EGTA)2 metallamacrocyclic cation

Zhang

Chen

et al. 2011

Inorganic Chemistry Communications

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“…Herein, we report, for the first time, the synthesis of phase-pure 1 , as well as its stability and gas sorption properties. This systematic study demonstrates that controlling the pH of the reaction media is a key to the successful synthesis of phase-pure 1 , which has not been widely recognized in the synthesis of porous MOFs …”

Section: Introductionmentioning

confidence: 99%

Synthesis of Phase-Pure Interpenetrated MOF-5 and Its Gas Sorption Properties

et al. 2011

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For the first time, phase-pure interpenetrated MOF-5 (1) has been synthesized and its gas sorption properties have been investigated. The phase purity of the material was confirmed by both single-crystal and powder X-ray diffraction studies and TGA analysis. A systematic study revealed that controlling the pH of the reaction medium is critical to the synthesis of phase-pure 1, and the optimum apparent pH (pH*) for the formation of 1 is 4.0-4.5. At higher or lower pH*, [Zn(2)(BDC)(2)(DMF)(2)] (2) or [Zn(5)(OH)(4)(BDC)(3)] (3), respectively, was predominantly formed. The pore size distribution obtained from Ar sorption experiments at 87 K showed only one peak, at ~6.7 Å, which is consistent with the average pore size of 1 revealed by single crystal X-ray crystallography. Compared to MOF-5, 1 exhibited higher stability toward heat and moisture. Although its surface area is much smaller than that of MOF-5 due to interpenetration, 1 showed a significantly higher hydrogen capacity (both gravimetric and volumetric) than MOF-5 at 77 K and 1 atm, presumably because of its higher enthalpy of adsorption, which may correlate with its higher volumetric hydrogen uptake compared to MOF-5 at room temperature, up to 100 bar. However, at high pressures and 77 K, where the saturated H(2) uptake mostly depends on the surface area of a porous material, the total hydrogen uptake of 1 is notably lower than that of MOF-5.

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“…The coordinating ability of POM may be affected by the pH condition and so resulting in different structures. [36][37][38] Change in pH may also lead to structural change in the POM itself, and hence the assembly based on these uniquely structured building blocks. [39][40][41] Metal oxidation numbers may also be altered upon pH change of the reaction mixture containing POM, which in turn, induces structural change of the resulting coordination frameworks.…”

Section: Ph Effect On the Structures Of Polyoxometalates-based Metalo...mentioning

confidence: 99%

pH effect on the assembly of metal–organic architectures

Liu

2010

CrystEngComm

241

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Crystal engineering is the rational design and assembly of solid-state structures with desired properties via the manipulation of intermolecular interactions, hydrogen bonding and metalligand complexation in particular. The heart of crystal engineering is to control the ordering of the building blocks, be they molecular or ionic, toward a specific disposition in the solid state. The relatively weak strength of intermolecular forces with respect to chemical bonding renders the assembly of supramolecular constructs sensitive to external physical and chemical stimuli, with pH condition of the reaction mixture being arguably the most prominent and extensively observed. Using selected examples of constructing metal-organic architectures from recent literature, the influences of pH on the specific ligand forms, the generation and metal coordination of hydroxo ligands, ligand transformation promoted by pH condition changes, pH-dependent kinetics of crystallization of a number of metal-organic architectures are discussed. Current status of this particular areas of research in supramolecular chemistry and materials are assessed and personal perspectives as to toward what directions should this chemistry head are elaborated.

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Assembly of two novel coordination polymers constructed from metal-organic framework and Keggin-template

Cited by 24 publications

References 67 publications

A new 3D hybrid architecture containing Keggin-type tungstosilicate and Cu4(EGTA)2 metallamacrocyclic cation

A new 3D hybrid architecture containing Keggin-type tungstosilicate and Cu4(EGTA)2 metallamacrocyclic cation

Synthesis of Phase-Pure Interpenetrated MOF-5 and Its Gas Sorption Properties

pH effect on the assembly of metal–organic architectures

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