Metal–organic frameworks derived from bis-pyridyl-bis-amide ligands :  Effect of positional isomerism of the ligands, hydrogen bonding backbone, counter anions on the supramolecular structures and selective crystallization of the sulfate anion

Two structurally different metal–organic frameworks based on Sr2+ ions and 1,2,4,5-tetrakis(4-carboxyphenyl)benzene linkers have been synthesized solvothermally in different solvent systems and studied with single-crystal X-ray diffraction technique. These are poly[[μ12-4,4′,4′′,4′′′-(benzene-1,2,4,5-tetrayl)tetrabenzoato](dimethylformamide)distrontium(II)], [Sr2(C34H18O8)(C3H7NO)2] n , and poly[tetraaqua{μ2-4,4′-[4,5-bis(4-carboxyphenyl)benzene-1,2-diyl]dibenzoato}tristrontium(II)], [Sr3(C34H20O8)2(H2O)4]. The differences are noted between the crystal structures and coordination modes of these two MOFs, which are responsible for their semiconductor properties, where structural control over the bandgap is desirable. Hydrogen bonding is present in only one of the compounds, suggesting it has a slightly higher structural stability.

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High Capacity Oil Denitrogenation over Azine- and Tetrazine-Decorated Metal–Organic Frameworks: Critical Roles of Hydrogen Bonding

ACS Applied Materials & Interfaces ◽

10.1021/acsami.9b05282 ◽

2019 ◽

Vol 11 (24) ◽

pp. 21711-21719 ◽

Cited By ~ 7

Author(s):

Sayed Ali Akbar Razavi ◽

Ali Morsali

Keyword(s):

Hydrogen Bonding ◽

Metal Organic Frameworks ◽

High Capacity ◽

Metal Organic

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Removal of Acid Orange 7 from Aqueous Solution by Metal-Organic Frameworks

Crystals ◽

10.3390/cryst9010017 ◽

2018 ◽

Vol 9 (1) ◽

pp. 17 ◽

Cited By ~ 12

Author(s):

Sungwon Yoon ◽

James Calvo ◽

Monica So

Keyword(s):

Aqueous Solution ◽

Hydrogen Bonding ◽

Adsorption Capacity ◽

Metal Clusters ◽

Metal Organic Frameworks ◽

Acid Orange 7 ◽

Acid Orange ◽

Zeta Potentials ◽

Metal Organic ◽

Capacity Data

We investigated the removal of a harmful anionic dye, acid orange 7 (AO7), from aqueous solution using metal-organic frameworks (MOFs). We prepared four different MOFs (ZIF-8, ZIF-67, UiO-66, UiO-66-NH2) by solvothermal reactions and then tested their adsorption of AO7. Infrared spectra and adsorption capacity data confirmed the removal of AO7 from aqueous solution. The factors we investigated affecting adsorption capacity include variation of the organic linkers and metal clusters of the MOFs. Our results suggest that the hydrogen bonding, π–π interactions, and zeta potentials facilitate the removal of AO7 from water. Of the four MOFs examined, ZIF-67 exhibited the highest adsorption capacity of AO7 and can be regenerated easily.

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Piecewise 3D Printing of Crystallographic Data for Post-Printing Construction

10.26434/chemrxiv.8233475.v2 ◽

2019 ◽

Author(s):

Matthew Brown ◽

David Hartling ◽

Hamel N. Tailor ◽

Ken Van Wieren ◽

Gary Houghton ◽

...

Keyword(s):

Hydrogen Bonding ◽

3D Printing ◽

Small Molecules ◽

Coordination Polymers ◽

Metal Organic Frameworks ◽

Crystallographic Data ◽

Metal Organic ◽

Hydrogen Bonding Networks ◽

Time Reduction ◽

Size Limits

A method of 3D printing complex or challenging structures by breaking them into parts with connectors, printing each part separately, and then assembling the structure post-printing has been developed. This has advantages such as multicoloured printing, framework optimization and reduction, print time reduction, and can be used to bypass print tray size limits. This method is particularly applicable to extended structures such as coordination polymers, metal-organic frameworks, and hydrogen bonding networks, but examples where it can be used to simplify the printing of small molecules are also shown.

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