Temperature-Dependent Nitrous Oxide/Carbon Dioxide Preferential Adsorption in a Thiazolium-Functionalized NU-1000 Metal-Organic Framework.

Solvent-assisted ligand incorporation (SALI) of the ditopic linker 5-carboxy-3-(4-carboxybenzyl)thiazolium bromide [()Br] into the zirconium metal-organic framework [ZrO(OH)(HO)(TBAPy), where NU = Northwestern University and HTBAPy = 1,3,6,8-tetrakis(-benzoic-acid)pyrene], led to the SALIed material of minimal formula [ZrO(OH)(HO)(TBAPy)()]Br. has been thoroughly characterized in the solid state. As confirmed by powder X-ray diffraction, this material keeps the same three-dimensional architecture of and the dicarboxylic extra linker bridges adjacent [Zr] nodes 8 Å far apart along the crystallographic -axis.

Carbon Dioxide Capture and Utilization with Isomeric Forms of Bis(amino)-Tagged Zinc Bipyrazolate Metal-Organic Frameworks.

Aiming at extending the tagged zinc bipyrazolate metal-organic frameworks (MOFs) family, the ligand 3,3'-diamino-4,4'-bipyrazole (3,3'-H L) has been synthesized in good yield. The reaction with zinc(II) acetate hydrate led to the related MOF Zn(3,3'-L). The compound is isostructural with its mono(amino) analogue Zn(BPZNH ) and with Zn(3,5-L), its isomeric parent built with 3,5-diamino-4,4'-bipyrazole.

Highly Nickel-Loaded γ-Alumina Composites for a Radiofrequency-Heated, Low-Temperature CO Methanation Scheme.

In this work, we joined highly Ni-loaded γ-Al O composites, straightforwardly prepared by impregnation methods, with an induction heating setup suited to control, almost in real-time, any temperature swing at the catalyst sites (i. e., "hot spots" ignition) caused by an exothermic reaction at the heart of the power-to-gas (P2G) chain: CO methanation.

Cobalt(II) Bipyrazolate Metal-Organic Frameworks as Heterogeneous Catalysts in Cumene Aerobic Oxidation: A Tag-Dependent Selectivity.

Three metal-organic frameworks with the general formula (BPZX = 3-X-4,4'-bipyrazolate, X = H, NH, NO) constructed with ligands having different functional groups on the same skeleton have been employed as heterogeneous catalysts for aerobic liquid-phase oxidation of cumene with O as oxidant. O adsorption isotherms collected at = 1 atm and = 195 and 273 K have cast light on the relative affinity of these catalysts for dioxygen. The highest gas uptake at 195 K is found for (3.

Playing with covalent triazine framework tiles for improved CO adsorption properties and catalytic performance.

The rational design and synthesis of covalent triazine frameworks (CTFs) from defined dicyano-aryl building blocks or their binary mixtures is of fundamental importance for a judicious tuning of the chemico-physical and morphological properties of this class of porous organic polymers. In fact, their gas adsorption capacity and their performance in a variety of catalytic transformations can be modulated through an appropriate selection of the building blocks. In this contribution, a set of five CTFs (-) have been prepared under classical ionothermal conditions from single dicyano-aryl or heteroaryl systems.

Tuning Carbon Dioxide Adsorption Affinity of Zinc(II) MOFs by Mixing Bis(pyrazolate) Ligands with N-Containing Tags.

The four zinc(II) mixed-ligand metal-organic frameworks (MIXMOFs) Zn(BPZ)(BPZNO), Zn(BPZ)(BPZNH), Zn(BPZNO)(BPZNH), and Zn(BPZ)(BPZNO)(BPZNH) (HBPZ = 4,4'-bipyrazole; HBPZNO = 3-nitro-4,4'-bipyrazole; HBPZNH = 3-amino-4,4'-bipyrazole) were prepared through solvothermal routes and fully investigated in the solid state. Isoreticular to the end members Zn(BPZ) and Zn(BPZX) (X = NO, NH), they are the first examples ever reported of (pyr)azolate MIXMOFs. Their crystal structure is characterized by a three-dimensional open framework with one-dimensional square or rhombic channels decorated by the functional groups.

Hydrogenolysis of Dinuclear PCN Ligated Pd μ-Hydroxides and Their Mononuclear Pd Hydroxide Analogues.

The hydrogenolysis of mono- and dinuclear Pd hydroxides was investigated both experimentally and computationally. It was found that the dinuclear μ-hydroxide complexes {[(PCN )Pd] (μ-OH)}(OTf) (PCN =1-[3-[(di-tert-butylphosphino)methyl]phenyl]-1H-pyrazole; PCN =1-[3-[(di-tert-butylphosphino)methyl]phenyl]-5-methyl-1H-pyrazole) react with H to form the analogous dinuclear hydride species {[(PCN )Pd] (μ-H)}(OTf). The dinuclear μ-hydride complexes were fully characterized, and are rare examples of structurally characterized unsupported singly bridged μ-H Pd dimers.

Nickel Sulfides Decorated SiC Foam for the Low Temperature Conversion of H₂S into Elemental Sulfur.

The selective oxidation of H₂S to elemental sulfur was carried out on a NiS₂/SiC catalyst under reaction temperatures between 40 and 80 °C using highly H₂S enriched effluents (from 0.5 to 1 vol.%).