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Articles from Wiley

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The latest papers in Chemistry Europe
Aggiornato: 4 settimane 6 giorni fa

Controlled Growth of Sr<sub><i>x</i></sub>Ba<sub>1−<i>x</i></sub>Nb<sub>2</sub>O<sub>6</sub> Hopper- and Cube-Shaped Nanostructures by Hydrothermal Synthesis

30 aprile, 2020 - 00:00

Take shape: Controlling the shape and size of nanostructured materials has been a topic of interest in the field of material science for decades. Here SrxBa1−xNb2O6 (x=0.32-0.82, SBN) was prepared by hydrothermal synthesis, and the morphology is controllably changed from cube-shaped to hollow-ended structures based on a fundamental understanding of the precursor chemistry.

[Full Papers]
Ola G. Grendal, Inger-Emma Nylund, Dr. Anders B. Blichfeld, Dr. Satoshi Tominaka, Dr. Koji Ohara, Prof. Sverre M. Selbach, Prof. Tor Grande, Prof. Mari-Ann Einarsrud
doi.org/10.1002/chem.202000373

Correlating Solution- and Solid-State Structures of Conformationally Flexible Resorcinarenes: Significance of a Sulfonyl Group in Intramolecular Self-Inclusion

30 aprile, 2020 - 00:00

Self-inclusion: An intramolecular self-inclusion complex of a flexible resorcinarene podand stabilised by weak C−H⋅⋅⋅O interactions has been observed in both the crystal structure and in solution (see figure). The solid-state conformation was determined by XRD and the conformation in solution was investigated by NMR and computational methods, with good agreement observed between the different techniques.

[Full Papers]
Małgorzata Pamuła, Prof. Maija Nissinen, Dr. Kaisa Helttunen
doi.org/10.1002/chem.201905211

Surface Nanostructures Based on Assemblies of Polymer Brushes

30 aprile, 2020 - 00:00

Brush strokes: This Minireview outlines progress in the self-assembly of polymer brushes (homopolymer, block-copolymer, and mixed-polymer brushes) and surface co-assembly of polymer brushes and “free” polymer chains. Typical surface nanostructures and properties achieved through surface co-assembly approach are reviewed, and the mechanisms and potential applications of the surface assemblies are discussed.

[Minireviews]
Wangmeng Hou, Yingze Liu, Prof. Hanying Zhao
doi.org/10.1002/cplu.202000112

Enhanced Water Management in PEMFCs: Perforated Catalyst Layer and Microporous Layers

30 aprile, 2020 - 00:00

The lay(er) of the land: The effect of the catalyst layer and microporous layer perforation on water management and performance of PEMFCs is studied. High-resolution operando neutron tomography is used to visualize the liquid water content and distribution beneath the land and channel regions. The perforated layers enhance the performance of the cells at high current densities owing to more efficient water transport through larger pores.

[Communications]
Arezou Mohseninia, Dena Kartouzian, Robert Schlumberger, Dr. Henning Markötter, Dr. Florian Wilhelm, Dr. Joachim Scholta, Dr. Ingo Manke
doi.org/10.1002/cssc.202000542

Response of <i>Pseudomonas putida</i> to Complex, Aromatic-Rich Fractions from Biomass

30 aprile, 2020 - 00:00

Walk on the wild type: Cholinium ionic liquid pretreatment of sorghum produces soluble, aromatic-rich fractions that are converted by Pseudomonas putida, a promising host for aromatic bioconversion. Growth studies and mutational analysis demonstrate that P. putida growth on these fractions depends on the aromatic monomers but unknown factors also contributed.

[Full Papers]
Dr. Mee-Rye Park, Dr. Yan Chen, Dr. Mitchell Thompson, Veronica T. Benites, Bonnie Fong, Dr. Christopher J. Petzold, Dr. Edward E. K. Baidoo, Dr. John M. Gladden, Dr. Paul D. Adams, Prof. Jay D. Keasling, Dr. Blake A. Simmons, Dr. Steven W. Singer
doi.org/10.1002/cssc.202000268

Hydro(deoxygenation) Reaction Network of Lignocellulosic Oxygenates

30 aprile, 2020 - 00:00

Adding value step by step: Hydrodeoxygenation is a key transformation step to convert lignocellulosic oxygenates into high-value hydrocarbons. This review focuses on concise mechanistic analysis of biorefinery oxygenates (C10-35) for their deoxygenation processes, with a special emphasis on their interactions with active sites in a complex chemical environment.

[Minireviews]
Saikat Dutta
doi.org/10.1002/cssc.202000247

“Waste to Wealth”: Lignin as a Renewable Building Block for Energy Harvesting/Storage and Environmental Remediation

30 aprile, 2020 - 00:00

Waste to Wealth: Lignin is the second most earth-abundant organic material that exhibits various attractive physicochemical properties; however, it has been underutilized due to its recalcitrant nature. This Review introduces recent developments in lignin processing, integration, and applications in the areas of energy conversion, energy storage, and environmental remediation.

[Reviews]
Ding Wang, Dr. Sahng Ha Lee, Jinhyun Kim, Prof. Dr. Chan Beum Park
doi.org/10.1002/cssc.202000394

Composition-Defined Bimetallic Mo-Pt Sub-Nanosized Particles

30 aprile, 2020 - 00:00

This work demonstrated for the first time to produce composition defined Mo-Pt bimetallic nanoparticles with sub nano-size, by using the phenylazomethine dendrimer as the molecular template. Mo-Pt (Mo/Pt = 1/2 or 1/6) sub-nanosized particles were confirmed and analyzed by the scanning transmission electron microscopy with energy dispersive X-ray spectrometry and X-ray photoelectron spectroscopy.

[Communications]
Dr. Masanori Wakizaka, Hisanori Muramatsu, Dr. Takane Imaoka, Prof. Dr. Kimihisa Yamamoto
doi.org/10.1002/ejic.202000055

Ligand Effects in Calcium Catalyzed Ketone Hydroboration

30 aprile, 2020 - 00:00

A series of calcium amidinate complexes with various anionic ligands or counterions were shown to catalyze ketone hydroboration. The influence of ligand variation is discussed. Catalysts with inactive ligands {I- or B(C6F5)4-} follow a Lewis acid mechanism while those with reactive ligands {H- or (Me3Si)2N-} follow a hydride or borate mechanism.

[Full Papers]
Steffen Brand, Andrea Causero, Holger Elsen, Jürgen Pahl, Jens Langer, Sjoerd Harder
doi.org/10.1002/ejic.202000264

[Mn(terpy)Sb<sub>2</sub>S<sub>4</sub>]<i><sub>n</sub></i>, a 1D Network of MnSb<sub>4</sub>S<sub>5</sub> Rings Exhibiting a Pronounced Magnetocaloric Effect and Luminescence

30 aprile, 2020 - 00:00

A remarkable large magnetocaloric effect is observed for the coordination polymer [Mn(terpy)Sb2S4]n. The compound was prepared under solvothermal conditions with either Na3SbS3 or Na3SbS4·9H2O in the presence of [Mn(terpy)2](ClO4)2 or Mn(ClO4)2·6H2O and terpy. The network topology is unique among all thioantimonate(III)-containing structures.

[Full Papers]
Felix Danker, Dr. Carolin Anderer, Dr. Michael Poschmann, Prof. Dr. Huayna Terraschke, Prof. Dr. Christian Näther, Dr. Dr. Jan van Leusen, Prof. Dr. Wolfgang Bensch, Prof. Dr. Paul Kögerler
doi.org/10.1002/ejic.202000225

Polyoxometalate Composites in Cancer Therapy and Diagnostics

30 aprile, 2020 - 00:00

A new role: Beyond the classic antitumoural activity of polyoxometalates, their emergent role in radiotherapy and photothermal therapy is expected to impact the research devoted to cancer therapy. This Minireview covers the application of POM-based composites as photothermal agents, radiosensitizers, biosensors, and the latest advances in the development POM theranostic systems.

[Minireview]
Gabriela Guedes, Dr. Shiqi Wang, Prof. Dr. Hélder A. Santos, Dr. Filipa L. Sousa
doi.org/10.1002/ejic.202000066

Fe<sub>3</sub>O<sub>4</sub>@MOF Magnetic Nanocomposites: Synthesis and Applications

30 aprile, 2020 - 00:00

A combination of Fe3O4 magnetic nanoparticles and metal-organic frameworks leads to the formation of magnetic framework composites with unique design principles by various synthesis methods. Promising applications in different areas such as catalysis, biomedical, extraction, are discussed. The recent advances are summarized, and evaluations are given in this review.

[Minireview]
Milad Aghayi-Anaraki, Dr. Vahid Safarifard
doi.org/10.1002/ejic.202000012

Organophotochemical S<sub>N</sub>Ar Reactions of Mildly Electron-Poor Fluoroarenes

30 aprile, 2020 - 00:00

C-F functionalization of arenes with a range of alcohol and pyrazole nucleophiles has been achieved without the need for metal catalysts or highly electron-poor substrates. Treatment of fluoroarenes with alcohols or pyrazoles and DDQ under irradiation by blue LED light provides the corresponding substituted products.

[Communications]
Thomas Sheridan, Hatice G. Yayla, Yajing Lian, Julien Genovino, Nat Monck, Jonathan W. Burton
doi.org/10.1002/ejoc.202000337

Expedient Pd-Catalyzed α-Arylation towards Dibenzoxepinones: Pivotal Manske's Ketone for the Formal Synthesis of Cularine Alkaloids

30 aprile, 2020 - 00:00

We report on the intramolecular Pd-catalysed α-arylation/cyclization sequence for the synthesis of dibenz[b,f]oxepin-10-ones from diaryl ethers. The substrate scope was investigated by varying substitution pattern on both aryl rings. The present work demonstrates the shortest route to Manske's ketone, a pivotal intermediate for the synthesis of four of the Cularine alkaloids.

[Communications]
Julie A. Deichert, Dr. Hideya Mizufune, Dr. Jignesh J. Patel, Dr. Timothy E. Hurst, Dr. Ashish Maheta, Dr. Mathew O. Kitching, Prof. Avena C. Ross, Prof. Victor Snieckus
doi.org/10.1002/ejoc.202000424

Gram-Scale Synthesis of Tomatidine, a Steroid Alkaloid with Antibiotic Properties Against Persistent Forms of <i>Staphylococcus aureus</i>

30 aprile, 2020 - 00:00

The first synthesis of the Solanum alkaloid tomatidine was achieved in 24.9 % (longest linear sequence) through addition of a chiral organolithium fragment to a protected dinorcholanic lactone derived from commercially available diosgenin. This approach enabled the multigram synthesis with the goal to support further studies of its antibiotic properties against persistent forms of Staphylococcus aureus.

[Full Papers]
Chad Normandin, François Malouin, Eric Marsault
doi.org/10.1002/ejoc.202000051

Protecting-Group-Directed Diastereoselective Synthesis of Substituted Tetrahydropyrroloquinolines

30 aprile, 2020 - 00:00

A novel synthetic method for chiral tricyclic tetrahydropyrroloquinolines following a protecting-group-directed domino reaction consisting of Michael addition and Mannich cyclization under mild reaction conditions was developed.

[Full Papers]
Tohasib Yusub Chaudhari, N. Arjunreddy Mallampudi, Deepak Bansal, Debendra K. Mohapatra, Vibha Tandon
doi.org/10.1002/ejoc.202000348

Hollow MoS<sub>3</sub> Nanospheres as Electrode Material for “Water-in-Salt” Li-Ion Batteries

27 aprile, 2020 - 00:00

A WISE choice: Hollow MoS3 nanospheres are synthesized via a scalable template-based method to be used as anode for Li-ion batteries (LIBs) using “water-in-salt” electrolytes (WISE). High specific capacity and excellent stability are achieved in WIS-LIBs and the working mechanism of MoS3 in aqueous LIBs is reviewed.

[Articles]
Ting Quan, Dr. Yaolin Xu, Dr. Michael Tovar, Dr. Nicolas Goubard-Bretesché, Dr. Zhaolong Li, Dr. Zdravko Kochovski, Dr. Holm Kirmse, Kai Skrodczky, Dr. Shilin Mei, Dr. Hongtao Yu, Dr. Daniel Abou-Ras, Dr. Marnix Wagemaker, Prof. Yan Lu
doi.org/10.1002/batt.202000042

Nitroreductase-Mediated Release of Inhibitors of Lysine-Specific Demethylase 1 (LSD1) from Prodrugs in Transfected Acute Myeloid Leukaemia Cells

27 aprile, 2020 - 00:00

Site-specific targeting: Nitroaromatic prodrugs were activated by the bacterial nitroreductase NfsB (NTR) to selectively inhibit lysine-specific demethylase 1 (LSD1) in transfected leukaemic cells. The effects of LSD1 inhibition and cytotoxicity of the side products were distinguished by negative controls. This system may be applied in targeting approaches to reach site-specific LSD1 inhibition.

[Full Papers]
Eva-Maria Herrlinger, Mirjam Hau, Dr. Desiree Melanie Redhaber, Dr. Gabriele Greve, Dr. Dominica Willmann, Simon Steimle, Prof. Dr. Michael Müller, Prof. Michael Lübbert, Dr. Christoph Cornelius Miething, Prof. Roland Schüle, Prof. Manfred Jung
doi.org/10.1002/cbic.202000138

Optochemical Control of Protein Degradation

27 aprile, 2020 - 00:00

Stereochemistry matters: Optochemical approach has been used to regulate cellular protein degradation with a high resolution of spatiotemporal control. Two recent studies combining reversible optochemical functionalities with bifunctional proteolysis targeting chimeras, PHOTACs and photoPROTACs, are highlighted here to illustrate light-controlled degradation of desired protein.

[Highlights]
Dr. Peng Wu, Dr. Debasish Manna
doi.org/10.1002/cbic.202000113

Recent Development of Photothermal Agents (PTAs) Based on Small Organic Molecular Dyes

27 aprile, 2020 - 00:00

Photothermal therapy being a noninvasive cancer therapy, there is intense interest in synthesizing highly efficient PTAs that can convert light into heat. In this paper, we highlight recent developments in PTAs based on small-molecule dyes and discuss the main factors limiting their translation into clinical applications.

[Minireviews]
Shibo Lv, Yuyang Miao, Dr. Dapeng Liu, Prof. Fengling Song
doi.org/10.1002/cbic.202000089

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