Articles from Wiley
Doping Copper Ions into an Fe/N/C Composite Promotes Catalyst Performance for the Oxygen Reduction Reaction
Top performer: A two-step method is employed to prepare Fe, Cu, and N-doped rGO/CNT composites as efficient and stable electrocatalysts for the oxygen reduction reaction (ORR). Additional doping of Cu ions into the Fe/N/C catalyst significantly promotes the catalyst ORR performance.
Guo-Qiang Yu, Ping-Jie Wei, Fei-Fei Wang, Jin-Gang Liu
ChemElectroChem, April 07, 2017, https://doi.org/10.1002/celc.201600904 Read article
Solving the problem: The physical phenomenon of gas oversolubility in nanoconfined liquids is applied for the catalytic cycloaddition of carbon dioxide to epoxides to generate cyclic carbonates at room temperature under atmospheric pressure. A hybrid adsorbent based on the MCM-41 silica material exhibits enhanced catalytic properties and multicycle stability, providing an effective and sustainable catalytic system.
Maria V. Zakharova, Freddy Kleitz, Frédéric-Georges Fontaine
ChemCatChem, April 07, 2017, https://doi.org/10.1002/cctc.201700247 Read article
Self-assembly- and Preshaping-assisted Synthesis of Molybdenum Carbide Supported on Ultrathin Nitrogen-doped Graphitic Carbon Lamellas for the Hydrogen Evolution Reaction
In control: The controllable synthesis of highly dispersed Mo2C nanoparticles supported on porous graphitic carbon lamellas is reported. Serious overlapping of carbon and excessive growth of Mo2C are prevented, and Mo2C/C has a 2 D lamellar structure even after high-temperature carburization. The constructed Mo2C/C-lamellas exhibits higher activity in the hydrogen evolution reaction than traditional bulk Mo2C/C and shows long-term stability.
Lishan Peng, Yao Nie, Ling Zhang, Rui Xiang, Jun Wang, Hongmei Chen, Ke Chen, Zidong Wei
ChemCatChem, April 07, 2017, https://doi.org/10.1002/cctc.201700239 Read article
Photo op: A method for the synthesis of 1,2-diketones through the 9,10-dicyanoanthracene (DCA)-sensitized photooxygenation of alkynes upon visible-light irradiation is reported. Mechanistic studies indicate that a radical-cation intermediate might be involved. The first examples of the transformation of alkynes via acetenyl radical cation intermediates are provided.
Hai-Tao Qin, Xiao Xu, Feng Liu
ChemCatChem, April 07, 2017, https://doi.org/10.1002/cctc.201700061 Read article
Disassembling Metal Nanocrystallites into Sub-nanometric Clusters and Low-faceted Nanoparticles for Multisite Catalytic Reactions
Disassembled, but working together: Metal nanocrystallites have saturated atoms, in planes, and unsaturated metal atoms, in corners and vertices, which perform different roles in catalysis: both sites are spatially complementary so their number cannot be independently maximized for a catalytic process. However, by independently adding sub-nanometric Au clusters and metallic Au nanoparticles, not only iodo- and bromobenzenes, but also chlorobenzenes can react with a wide variety of alkynes in the Sonogashira reaction, outperforming any previous Au catalyst and ligand-free Pd and Cu catalysts.
Judit Oliver-Meseguer, Irene Dominguez, Rafael Gavara, Antonio Leyva-Pérez, Avelino Corma
ChemCatChem, April 07, 2017, https://doi.org/10.1002/cctc.201700037 Read article
Supercritical Antisolvent Precipitation of Amorphous Copper–Zinc Georgeite and Acetate Precursors for the Preparation of Ambient-Pressure Water-Gas-Shift Copper/Zinc Oxide Catalysts
Water gives performance: Cu/ZnO catalyst precursors are prepared by supercritical CO2 antisolvent precipitation with water addition effecting the meso- and nanostructure of the resulting material. Optimum catalysts are derived from zincian georgeite, which thermally decompose mildly to give highly dispersed metal-oxide crystallites inside a carbonate matrix.
Paul J. Smith, Simon A. Kondrat, James H. Carter, Philip A. Chater, Jonathan K. Bartley, Stuart H. Taylor, Michael S. Spencer, Graham J. Hutchings
ChemCatChem, April 07, 2017, https://doi.org/10.1002/cctc.201601603 Read article
Spectroscopic and Computational Investigations of Ligand Binding to IspH: Discovery of Non-diphosphate Inhibitors
ISO isoprenoid ligands: Using EPR, HYSCORE, and NRVS spectroscopy, together with in silico screening, we investigated how ligands bind to the isoprenoid biosynthesis enzyme IspH. This resulted in the identification of novel barbiturate inhibitors with Ki values as low as 500 nm.
Bing O'Dowd, Sarah Williams, Hongxin Wang, Joo Hwan No, Guodong Rao, Weixue Wang, J. Andrew McCammon, Stephen P. Cramer, Eric Oldfield
ChemBioChem, April 07, 2017, https://doi.org/10.1002/cbic.201700052 Read article
Going forward: SFM19, a Taq polymerase variant, can synthesize 2′-modified DNA, but with limited product length. Through a combination of biochemical characterization and rational design, we designed novel mutant DNA polymerases capable of improved enzymatic modified-DNA synthesis.
Sydney L. Rosenblum, Aurora G. Weiden, Eliza L. Lewis, Alexie L. Ogonowsky, Hannah E. Chia, Susanna E. Barrett, Mira D. Liu, Aaron M. Leconte
ChemBioChem, April 07, 2017, https://doi.org/10.1002/cbic.201600701 Read article
A Zn–porphyrin complex, Zn-DIGPor, binds to DNA and protects O6-methylguanine from the DNA repair enzyme O6-methylguanine-DNA methyltransferase. Zn-DIGPor succeeded in potentiating the effects of the anticancer drug temozolomide in an MGMT-expressing cell line. This represents the first example of DNA-targeted MGMT inhibition.
Theodor Marsoner, Olivia P. Schmidt, Therese Triemer, Nathan W. Luedtke
ChemBioChem, April 07, 2017, https://doi.org/10.1002/cbic.201600652 Read article
Ermal Ismalaj, Quentin Glenadel, Thierry Billard
Eur. J. Org. Chem., April 06, 2017, https://doi.org/10.1002/ejoc.201700103 Read article
The Fujiwara hydroarylation of alkynes was reinvestigated. Reactions were monitored by 1H NMR spectroscopy, by electrospray ionization mass spectrometry (ESI/MS), and through reactions carried out in the gas phase using MS/MS experiments.
Marla N. Godoi, Francisco de Azambuja, Pablo David G. Martinez, Nelson H. Morgon, Vanessa G. Santos, Thaís Regiani, Denis Lesage, Heloise Dossmann, Richard B. Cole, Marcos N. Eberlin, Carlos Roque D. Correia
Eur. J. Org. Chem., April 06, 2017, https://doi.org/10.1002/ejoc.201700033 Read article
Exploring “Through-Bond” Proximity between the Ion Tag and Reaction Site of an Imidazolium-Proline Catalyst for the Direct Asymmetric Aldol Reaction
Proline tagged with an imidazolium moiety at C-4, cis to COOH, has been synthesised and explored as catalyst for the direct asymmetric aldol reaction in the presence of water under solvent-free conditions. The study further establishes the role of ionic moieties in the enamine route to enantiopure aldol adducts and offers insight on the effect of the proximity of the ion tag to the reaction site.
Meeta Bhati, Shruti Upadhyay, Srinivasan Easwar
Eur. J. Org. Chem., April 06, 2017, https://doi.org/10.1002/ejoc.201700021 Read article
A Direct Synthesis of Isocytosine Analogues by Carbonylative Coupling of α-Chloro Ketones and Guanidines
Martina Capua, Serena Perrone, Fabio Bona, Antonio Salomone, Luigino Troisi
Eur. J. Org. Chem., April 06, 2017, https://doi.org/10.1002/ejoc.201601654 Read article
<i>N</i>-Sulfonylcarboxamide as an Oxidizing Directing Group for Ruthenium-Catalyzed C–H Activation/Annulation
Elina Petrova, Dace Rasina, Aigars Jirgensons
Eur. J. Org. Chem., April 06, 2017, https://doi.org/10.1002/ejoc.201601582 Read article
Oxidative Addition of Aryl Halides to Cationic Bis(phosphane)rhodium Complexes: Application in C–C Bond Formation
Anja König, Christian Fischer, Elisabetta Alberico, Carmen Selle, Hans-Joachim Drexler, Wolfgang Baumann, Detlef Heller
Eur. J. Inorg. Chem., April 06, 2017, https://doi.org/10.1002/ejic.201700051 Read article
A facile method to sort as-prepared graphene quantum dots (GQDs) into different sizes with narrow size distributions by using aluminum ions is developed. The mechanism of separation is investigated. The obtained differently sized GQDs exhibit dissimilar cytotoxicity, which suggests that their effects on cells or organisms could be different.
Jingyuan Liu, Fangwei Zhang, Fei Liu, Hui Liu, Jingyan Zhang, Shouwu Guo
Eur. J. Inorg. Chem., April 06, 2017, https://doi.org/10.1002/ejic.201700047 Read article
Sustainable Hypersaline Microbial Fuel Cells: Inexpensive Recyclable Polymer Supports for Carbon Nanotube Conductive Paint Anodes
Paint it black: A recyclable polymeric support is explored as a sustainable and inexpensive material for the development of anode electrodes to be applied in single-chamber microbial fuel cells operated in field under hypersaline conditions. The support is covered with a carbon-nanotube-based conductive paint to allow biofilms to colonize the electrodes and achieve stable power outputs.
Matteo Grattieri, Nelson D. Shivel, Iram Sifat, Massimiliano Bestetti, Shelley D. Minteer
ChemSusChem, April 06, 2017, https://doi.org/10.1002/cssc.201700099 Read article
Ring sorting: [n]CPPs (n=5, 6, 7, 8, and 10) interact selectively with [n+5]CPPs to form [n+5]CPP⊃[n]CPP complexes, which are the shortest double-walled armchair carbon nanotubes (see figure). The size-selective complex formation illustrates the importance of van der Waals interactions. A ternary complex, CPP⊃CPP⊃C60, is also formed by mixing CPP with CPP⊃C60.
Sigma Hashimoto, Takahiro Iwamoto, Daisuke Kurachi, Eiichi Kayahara, Shigeru Yamago
ChemPlusChem, April 06, 2017, https://doi.org/10.1002/cplu.201700097 Read article
Structure-Based Design and Synthesis of Harmine Derivatives with Different Selectivity Profiles in Kinase versus Monoamine Oxidase Inhibition
Choosing sides: The different orientations of harmine in the X-ray structures of this natural product bound to DYRK1A and monoamine oxidase A (MAO-A) suggest chemical ways to fine-tune the selectivity profile of this compound class. These structure-guided transformations led to the abolition of DYRK1A and/or MAO-A inhibition in harmine derivatives as well as to the synthesis of dual inhibitors of mixed inhibition ratio.
Balázs Bálint, Csaba Wéber, Francisco Cruzalegui, Mike Burbridge, Andras Kotschy
ChemMedChem, April 06, 2017, https://doi.org/10.1002/cmdc.201600539 Read article
Fluorescent probes: A bifunctional fluorescent probe with maleimide and cyclooctyne reactive groups was prepared and used for cross-linking proteins.
Melanie Wallisch, Stefan Sulmann, Karl-Wilhelm Koch, Jens Christoffers
Chem. Eur. J., April 06, 2017, https://doi.org/10.1002/chem.201700774 Read article