Papers: Recent submissions
Now showing items 741-760 of 1293
Synthetic Methods Driven by the Photoactivity of Electron Donor− Acceptor Complexes
The association of an electron-rich substrate with an electron-accepting molecule can generate a new molecular aggregate in the ground state, called an electron donor−acceptor (EDA) complex. Even when the two precursors ...
Polynuclear Fe(II) complexes: Di/trinuclear molecules and coordination networks
We review here the recent progress made in the synthesis of spin crossover (SCO) Fe(II) coordination complexes with two or three metal atoms, as well as coordination polymers, with the main focus on that in the last five ...
Photoinduced Oxygen Evolution Catalysis Promoted by Polyoxometalate Salts of Cationic Photosensitizers
The insoluble salt Cs15K[Co9(H2O)6(OH)3(HPO4)2(PW9O34)3] (CsCo9) is tested as heterogeneous oxygen evolution catalyst in light-induced experiments, when combined with the homogeneous photosensitizer [Ru(bpy)3 ]2+ and the ...
Cobalt hexacyanoferrate supported on Sb-doped SnO2 as a non-noble catalyst for oxygen evolution in acidic medium
This study investigates the activity and stability of a Prussian blue analogue (PBA) as an inexpensive anode catalyst for Polymer Electrolyte Membrane Water Electrolysis (PEMWE). While some PBAs have recently been reported ...
Unravelling MoIecular Aspects of the Migratory Insertion Step in Cp*CoIII Metallacyclic Systems
This Forum Article describes the reactivity and regioselectivity of the insertion of electrophiles, such as alkynes and alkenes, into Co–C bonds in the context of Cp*Co-catalyzed C–H functionalization reactions. The ...
Desymmetrisation of meso-diones promoted by a highly recyclable polymersupported chiral phosphoric acid catalyst
A polystyrene-supported BINOL-derived chiral phosphoric acid has been applied to the desymmetrisation of meso-diones to produce enantioenriched cyclohexenones. The catalytic resin has proven highly active and robust, giving ...
Nickel-Catalyzed Reductive [2+2] Cycloaddition of Alkynes
The nickel-catalyzed synthesis of tetrasubstituted cyclobutenes from alkynes is reported. This transformation is uniquely promoted by the use of a primary aminophosphine, an unusual ligand in nickel catalysis. Mechanistic ...
Optical Supramolecular Sensing of Creatinine
Calix[4]pyrrole phosphonate-cavitands were used as receptors for the design of supramolecular sensors for creatinine and its lipophilic derivative hexylcreatinine. The sensing principle is based on indicator displacement ...
Influence of the Attachment of a Gold(I) Phosphine Moiety at the Upper Rim of a Calix[4]pyrrole on the Binding of Tetraalkylammonium Chloride Salts
We report the synthesis of an unprecedented mono‐gold(I) phosphine complex based on a “two‐wall” aryl‐ethynyl extended calix[4]pyrrole. We describe and compare the binding properties of the parent 10α,20α‐bis‐aryl‐ethynyl ...
Chemistry glows green with photoredox catalysis
Can organic chemistry mimic nature in efficiency and sustainability? Not yet, but recent developments in photoredox catalysis animated the synthetic chemistry field, providing greener opportunities for industry and academia.
Acetylene as a Dicarbene Equivalent for Gold(I) Catalysis: Total Synthesis of Waitziacuminone in One Step
The gold(I)‐catalyzed reaction of acetylene gas with alkenes leads to (Z,Z)‐1,4‐disubstituted 1,3‐butadienes and biscyclopropanes depending on the donor ligand on gold(I). Acetylene was generated in situ from calcium carbide ...
Cobalt Amide Imidate Imidazolate Frameworks as Highly Active Oxygen Evolution Model Materials
Two imidazolate-based Co-MOFs, IFP-5 and IFP- 8 (imidazolate framework Potsdam), with a different peripheral group −R (−Me and −OMe, respectively) have been synthesized by a solvothermal method and tested toward the oxygen ...
Improved Electro- and Photocatalytic Water Reduction by Confined Cobalt Catalysts in Streptavidin
Incorporation of biotinylated aminopyridine cobalt complexes derived from the triazacyclononane scaffold into the streptavidin protein leads to formation of artificial metalloenzymes for water reduction to hydrogen. ...
Reductive Cyclization of Unactivated Alkyl Chlorides with Tethered Alkenes under Visible-Light Photoredox Catalysis
The chemical inertness of abundant and commercially available alkyl chlorides precludes their widespread use as reactants in chemical transformations. Presented in this work is a metallaphotoredox methodology to achieve ...
Site-Selective, Remote sp3 C-H Carboxylation Enabled by the Merger of Photoredox and Nickel Catalysis
A photoinduced carboxylation of alkyl halides with CO2 at remote sp3 C@H sites enabled by the merger of photoredox and Ni catalysis is described. This protocol features a predictable reactivity and site selectivity that can ...
Halogen‐Dependent Surface Confinement Governs Selective Alkane Functionalization to Olefins
The product distribution in direct alkane functionalization by oxyhalogenation strongly depends on the halogen of choice. We demonstrate that the superior selectivity to olefins over an iron phosphate catalyst in oxychlorination ...
Synthesis, X-ray Characterization and Density Functional Theory (DFT) Studies of Two Polymorphs of the , , , , Isomer of Tetra-p-Iodophenyl Tetramethyl Calix[4]pyrrole: On the Importance of Halogen Bonds
This manuscript reports the improved synthesis of the α,α,α,α isomer of tetra-p-iodophenyl tetra-methyl calix[4]pyrrole and the X-ray characterization of two solvate polymorphs. In the solid state, the calix[4]pyrrole ...
Development of C2-Symmetric Chiral Bifunctional Triamines: Synthesis and Application in Asymmetric Organocatalysis
The synthesis and application of a newly designed C2-symmetric chiral bifunctional triamine family (C2-CBT) is reported. These enantiopure chiral triamine scaffolds can be accessed in multigram amounts from simple amino ...
Direct magnetic enhancement of electrocatalytic water oxidation in alkaline media
Industrially profitable water splitting is one of the great challenges in the development of a viable and sustainable hydrogen economy. Alkaline electrolysers using Earth-abundant catalysts remain the most economically ...
Relative hydrophilicities of cis and trans formamides
Many studies have investigated secondary formamides as mixtures of cis and trans isomers. They are widespread in nature, but relatively low energetic barriers to interconversion prevent the isolation and characterization ...
