Dioxidobis{2-[(E)-p-tolyl­imino­meth­yl]phenolato}molybdenum(VI)

The asymmetric unit of the title compound, [Mo(C14H12NO)2O2], comprises half of the complex with the full mol­ecule generated by the application of twofold symmetry. The MoVI atom is surrounded by two oxide O atoms and the two sets of N,O-donor atoms of the bidentate Schiff base ligands. The resulting N2O4 donor set defines a distorted octa­hedral coordination geometry. Inter­molecular C—H⋯O contacts link mol­ecules into chains along the b axis. The crystal structure is further stabilized by inter­molecular π–π inter­actions [ring centroid–centroid distance = 3.724 (6) Å]

Multifunctional approach to improve water oxidation performance with MOF-based photoelectrodes

Metal-Organic Frameworks (MOFs) are a group of compounds with high porosity and diverse capabilities in photoelectrochemistry. The use of these compounds as photocatalysts and photoelectrodes is still a strong challenge due to bulk and surface recombination issues. To solve this problem, we applied a dual strategy to simultaneously enhance charge separation and catalytic activity in MIL-125-NH2 and UIO-66-NH2 MOF photocatalysts. Mesoporous TiO2 was used as electron-selective contact on the MOF surface (MOF/TiO2) to minimize bulk recombination. On the other hand, to increase the MOF catalytic activity for water oxidation, a well-matched Co3(PO4)2 (CoPi) co-catalyst (CoPi/MOF/TiO2) was used. The obtained results showed that CoPi and TiO2 were introduced in the MOF structure. The (CoPi/MOF/TiO2) photoelectrodes showed a photocurrent density 26 times higher compared to the reference MOF at 1.23 V vs. RHE for PEC water oxidation of artificial seawater, validating the developed strategy for further photocatalytic and photoelectrochemical applications.Funding for open access charge: CRUE-Universitat Jaume IWe acknowledge with appreciation the financial support from the University of Isfahan and Ministry of Science, Research and Technology Center for International Scientific Studies and Collaboration (CISSC). SG acknowledges the financial support from the Ministerio de Ciencia, Innovación y Universidades of Spain through funded project ENE2017-85087-C3-1-R

Bis[μ-(E)-N′-(4-oxido-4-phenyl­but-3-en-2-yl­idene)benzohydrazidato]bis­[pyridine­copper(II)]

In the crystal structure of the title centrosymmetric dimer, [Cu2(C17H14N2O2)2(C5H5N)2], the CuII atom has an almost perfect square-pyramidal geometry. The CuII ion is coordin­ated by the NO2 donor atoms of the hydrazide Schiff base ligand, the N atom of the pyridine group and an O atom of the symmetry-related unit. The dihedral angles between the pyridine ring and the two phenyl rings of the ligand are 21.4 (3) and 24.0 (2)°. The mol­ecular structure is stabilized by intra­molecular C—H⋯O inter­actions

{N,N′-[2,2′-(Ethane-1,2-diyldisulfanediyl)di-o-phenyl­ene]bis­(quinoline-2-carboxamidato)}copper(II)

In the title compound, [Cu(C34H24N4O2S2)] or [Cu(bqdapte)], where H2bqdapte is 1,2-{bis­[2-(quinoline-2-carboxamido)­phen­yl]sulfan­yl}ethane, the CuII ion is coordinated to the dianionic hexa­dentate bqdapte2− ligand by two amide and two quinoline N atoms and two thio­ether S atoms. In the observed conformation of the hexa­dentate ligand, the quinoline rings attain positions related by a twofold axis. The Cu atom displays a Jahn–Teller-distorted octa­hedral CuN4S2 geometry axially compressed along the two trans-configured Cu—Namidate bonds

Efficient buchwald hartwig reaction catalyzed by spions-bis(NHC)-Pd(II)

A powerful and convenient reaction procedure for the C-N coupling reaction (the Buchwald-Hartwig reaction), yielding products of N-arylanilines and N-arylamines in both conventional heating and microwave irradiation has been reported. The protocol utilizes a stable and new supper ferromagnetic nanoparticle chelating N-heterocyclic dicarbene palladium(II) complex (Pd-NHC) as catalyst which helps/allows us to complete the reaction with only 0.002 mol% Pd producing high yield products. We also examined the reusability of the catalyst. It was found that the catalyst could be recovered by external magnetic field and  reused for seven times without obvious loss in catalytic activity

SPION-A-Pd(EDTA) (superparamagnetic iron oxide nanoparticles-A-ethylendiamine tetraacetic acid) as a robust nanocatalyst for Buchwald-Hartwig C-N Coupling Reaction

During thelast20-30 years, palladium-catalyzed reactions have witnessed tremendous advances in the industrial and organic reactions such as hydrogenation, coupling, cyanation and amination. Despite the wide utility of Pd-catalysts in these reactions, they suffer from a number of drawbacks such as recovery, reuse of catalyst and remain as  a contaminant in the products at the end of the reaction. A powerful and convenient reaction procedure for the C-N coupling reaction (the Buchwld-Hartwig reaction), yielding products of N-arylanilines and N-arylamines in conventional heating has been reported. The protocol utilized an high stable Pd(EDTA)2- salt by counter cation of N-methylimidazolium bounded to 1,3,5-triazine-tethered SPIONs (superparamagnetic iron oxide nanoparticles). The reaction products were produced under conventional heating at extremely low catalyst loading (as low as 0.003 mol% Pd).Finally, we also examined the reusability of the catalyst.  It was found that the catalyst could be recovered by external magnetic field and be reused for five times without obvious loss in catalytic activity

N,N′-Bis(4-bromo­benzyl­idene)ethane-1,2-diamine

The mol­ecule of the title Schiff base compound, C16H14Br2N2, lies across a crystallographic inversion centre and adopts an E configuration with respect to the azomethine C=N bond. The imino group is coplanar with the aromatic ring. Within the mol­ecule, the planar units are parallel, but extend in opposite directions from the dimethyl­ene bridge. The crystal structure is stabilized by inter­molecular C—H⋯π inter­actions and Br⋯Br [3.6307 (4) Å] short contacts