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Articles from Wiley

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The latest papers in Chemistry Europe
Updated: 2 weeks 3 days ago

Remarkable Energy Barrier for Magnetization Reversal in 3D and 2D Dysprosium-Chloranilate-Based Coordination Polymers

25 June, 2020 - 00:00

CP magnets : Dysprosium(III) chloranilate (Cl2An) based coordination polymers (CPs) [{Dy(Cl2An)1.5(CH3OH)} 4.5 H2O]n (1 ) and [Dy(Cl2An)1.5(DMF)2]n (2 ) were synthesized and characterized. Magnetic investigations revealed field-induced slow magnetic relaxation behavior in both CPs. The larger ground-state QTM in 2 compared with 1 results in a higher energy barrier for magnetization reversal in the latter.

[Full Papers]
Arpan Mondal, Dr. Subhadip Roy, Prof. Dr. Sanjit Konar
doi.org/10.1002/chem.202000438

Synthesis, Structure, Reactivity and Catalytic Implications of a Cationic, Acetylide-Bridged Trigold-JohnPhos Species

25 June, 2020 - 00:00

Multinuclear gold : A new family of tri-AuI complexes have been characterised as intermediates during the [AuIL][SbF6] catalytic preparation of acetaldehyde acetals. These well-characterised cationic AuI intermediates lend support to the proposed reaction mechanism. An analogous copper complex revealed different behaviour, leading to a vinylphosphonium and copper nanoparticles.

[Full Papers]
Dr. Abdessamad Grirrane, Dr. Eleuterio Álvarez, Prof. Dr. Hermenegildo García, Prof. Dr. Avelino Corma
doi.org/10.1002/chem.202000420

Review and Prospect: Deep Learning in Nuclear Magnetic Resonance Spectroscopy

25 June, 2020 - 00:00

Applying automation : The applications of deep learning in NMR spectroscopy are summarized, and a perspective for deep learning as an entirely new approach that is likely to transform NMR spectroscopy into a much more efficient and powerful technique in chemistry and life sciences is outlined.

[Minireviews]
Dicheng Chen, Zi Wang, Prof. Di Guo, Prof. Vladislav Orekhov, Prof. Xiaobo Qu
doi.org/10.1002/chem.202000246

Evolution of High-Valent Nickela-Electrocatalyzed C−H Activation: From Cross(-Electrophile)-Couplings to Electrooxidative C−H Transformations

25 June, 2020 - 00:00

Go electro ! Nickela-electrocatalyzed C−H activations have emerged as a sustainable platform in molecular sciences that avoid substrate prefunctionalizations and chemical oxidants by electricity. The robust nickela-electrooxidations enabled C−C, C−O, and C−N formations with ample scope under exceedingly mild conditions.

[Reviews]
Shou-Kun Zhang, Dr. Ramesh C. Samanta, Dr. Antonio Del Vecchio, Prof. Dr. Lutz Ackermann
doi.org/10.1002/chem.202001318

Female Faculty: Why So Few and Why Care?

25 June, 2020 - 00:00

Diversity in academia : Data shows that there are few female faculty in academia today, with the percentage decreasing the higher the rank. There are many common responses to gender equality efforts that hamper progress of women in academia. Herein, we counteract such comments and discuss possible solutions along with concerns about how the COVID-19 pandemic may affect diversity in academia.

[Science Voices]
Prof. Dr. Shina Caroline Lynn Kamerlin, Prof. Dr. Pernilla Wittung-Stafshede
doi.org/10.1002/chem.202002522

Rationally Designed Polypharmacology: α-Helix Mimetics as Dual Inhibitors of the Oncoproteins Mcl-1 and HDM2

25 June, 2020 - 00:00

The anti-apoptotic protein Mcl-1 and E3 ubiquitin ligase HDM2 are both frequently upregulated in cancer. A small-molecule inhibitor can be developed by mimicking their protein binding partners, Bim and p53, to restore apoptosis in oncogenic cells. Through a polypharmacology approach, we have developed small-molecule α-helix mimetics with isoxazole, pyrazole, and thiazole scaffolds that function as dual inhibitors of Mcl-1 and HDM2.

[Communications]
Ivie L. Conlon, Dr. Brandon Drennen, Dr. Maryanna E. Lanning, Samuel Hughes, Rebecca Rothhaas, Dr. Paul T. Wilder, Dr. Alexander D. MacKerell Jr., Dr. Steven Fletcher
doi.org/10.1002/cmdc.202000278

Enhancement of Negative Photochromic Properties of Naphthalene-Bridged Phenoxyl-Imidazolyl Radical Complex

25 June, 2020 - 00:00

A fast, switchable negative photochromic molecule is useful as a photo-switch for functional materials applications. The authors succeed in controlling the thermal back reaction rates and enhancing the visible-light sensitivity of the naphthalene-bridged phenoxyl-imidazolyl radical complex (Np−PIC). These insights will be important for the future development of fast, switchable negative photochromic molecules.

[Articles]
Hiroki Ito, Dr. Katsuya Mutoh, Prof. Jiro Abe
doi.org/10.1002/cphc.202000296

Dependency of the Dimethyldihydropyrene Photochromic Properties on the Number of Pyridinium Electron-Withdrawing Groups

25 June, 2020 - 00:00

While substitution with one or two pyridinium electron-withdrawing groups improves the dimethyldihydropyrene (DHP) photoswitchability, the use of four pyridinium groups has a surprising detrimental effect. The authors report a theoretical study comparing the excited-state properties of these DHP compounds. A rationale for this unexpected behavior is provided based on topological features of the potential energy surfaces and symmetry arguments.

[Articles]
Elise Lognon, Dr. Marie-Catherine Heitz, Dr. Assil Bakkar, Dr. Saioa Cobo, Prof. Frédérique Loiseau, Prof. Eric Saint-Aman, Prof. Guy Royal, Dr. Martial Boggio-Pasqua
doi.org/10.1002/cphc.202000304

Reactive Extraction Enhanced by Synergic Microwave Heating: Furfural Yield Boost in Biphasic Systems

25 June, 2020 - 00:00

It's not just a phase : Reactive extraction of xylose to furfural is boosted by a synergic combination of microwave heating and biphasic operation to deliver a hot aqueous phase for reaction and a colder organic phase for extraction.

[Communications]
Luca Ricciardi, Dr. Willem Verboom, Prof. Dr. Jean-Paul Lange, Prof. Dr. Jurriaan Huskens
doi.org/10.1002/cssc.202000966

Fractionating and Purifying Softwood Kraft Lignin with Aqueous Renewable Solvents: Liquid-Liquid Equilibrium for the Lignin-Ethanol-Water System

25 June, 2020 - 00:00

Synergism in phase : The global phase behavior for lignin-ethanol-water mixtures is determined over a range of temperatures, solvent-to-lignin ratios, and EtOH/H2O solvent mixtures. Regions of liquid-liquid equilibrium are located in which lignin can be simultaneously fractionated and cleaned through the ALPHA process. The solvent-water synergism previously discovered for the renewable solvents acetic acid and acetone continues to be present for ethanol.

[Full Papers]
Graham W. Tindall, Josh Chong, Evan Miyasato, Prof. Dr. Mark C. Thies
doi.org/10.1002/cssc.202000701

Aqueous Calcium-Ion Battery Based on a Mesoporous Organic Anode and a Manganite Cathode with Long Cycling Performance

25 June, 2020 - 00:00

Abundant and durable : An aqueous calcium-ion battery (CIB) based on mesoporous silica SBA-15 with a two-dimensional hexagonal through-hole structure is reported. Poly(3,4,9,10-perylentetracarboxylic diimide) (PPTCDI) organic material supported on SBA-15 is used as the anode, with good stability and performance. The SBA-15@PPTCDI‖ Ca2MnO4 aqueous CIB demonstrates a high energy density with a high capacity and excellent cycling stability.

[Full Papers]
Dr. Ruibai Cang, Chunlin Zhao, Prof. Ke Ye, Prof. Jinling Yin, Dr. Kai Zhu, Prof. Jun Yan, Prof. Guiling Wang, Prof. Dianxue Cao
doi.org/10.1002/cssc.202000812

Ternary Cathode Blend Electrodes for Environmentally Friendly Lithium-Ion Batteries

25 June, 2020 - 00:00

More than the sum of its parts ! Moving from binary to ternary blends of active materials in cathode materials for lithium ion batteries provides a versatile design beyond the properties of the individual components. Synergistic effects improve the rate capability, power, thermal, and chemical stability of the blend. Overall advantageous performance is achieved while economizing 25 % cobalt and nickel of a NMC622 based electrode.

[Full Papers]
Nicola Michael Jobst, Dr. Alice Hoffmann, Dr. Andreas Klein, Stefan Zink, Dr. Margret Wohlfahrt-Mehrens
doi.org/10.1002/cssc.202000251

Tuning of the Oxygen Species Linker on the Surface of Polymeric Carbon Nitride to Promote the Photocatalytic Hydrogen Evolution Performance

25 June, 2020 - 00:00

Good connection : Effective charge separation is achieved by tuning the surface oxygen species linking site of polymeric carbon nitride, resulting in a high photocatalytic hydrogen production rate of approximately 10 225 μmol h−1 g−1 under visible light irradiation (λ>420 nm) and an apparent quantum efficiency of 5.7 % at 430 nm. The high hydrogen production was associated with the transformation of the oxygen species linker from −C=O to N=C−OH and then −C−O−C−.

[Full Papers]
Qin Lei, Dr. Rongzhi Chen, Yurong Zhao, Huanyu Chen, Xinxin Long, Dr. Jihua Tan, Prof. Xinming Wang
doi.org/10.1002/cssc.202001027

Oxygen-Defect-Rich Cobalt Ferrite Nanoparticles for Practical Water Electrolysis with High Activity and Durability

25 June, 2020 - 00:00

Active vacancies : The spinel oxide CoFe2O4 is transformed into a pH universal, bifunctional electrocatalyst for the hydrogen and oxygen evolution reactions by regulating the oxygen defects in the material. Application of this electrocatalyst for overall water splitting of freshwater, as well as real and artificial seawater is explored.

[Full Papers]
Bharati Debnath, Sahanaz Parvin, Harsha Dixit, Prof. Dr. Sayan Bhattacharyya
doi.org/10.1002/cssc.202000932

Transition-Metal Phosphorus Trisulfides and its Vacancy Defects: Emergence of a New Class of Anode Material for Li-Ion Batteries

25 June, 2020 - 00:00

Triple threat : The potential of transition-metal phosphorus trisulfide (TMPS3) monolayers as an anode material is explored towards Li-ion battery (LIB) application by using first-principle calculations. Both the pristine as well as the vacancy-defect surfaces exhibit great promise towards LIB application.

[Full Papers]
Rajkumar Jana, Dr. Chandra Chowdhury, Prof. Ayan Datta
doi.org/10.1002/cssc.202001302

Lignin-Based Micro- and Nanomaterials and their Composites in Biomedical Applications

25 June, 2020 - 00:00

Material gains : Lignin-based materials with good bioactivities initiate a new design not only for biomedical materials from natural resources but also for high-value utilization of lignin. In this Review, the status, limitations, and challenges of lignin-based materials in biomedical applications are discussed.

[Reviews]
Rui Liu, Prof. Dr. Lin Dai, Prof. Dr. Chunlin Xu, Prof. Dr. Kai Wang, Dr. Chunyang Zheng, Prof. Dr. Chuanling Si
doi.org/10.1002/cssc.202000783

A new mechanism for selective recognition of cyanide in organic and aqueous solution

25 June, 2020 - 00:00

We report that 3,5-dinitro-(N -phenyl)benzamide is proposed as a simple colorimetric and fluorimetric chemosensor for selective determination of cyanide anion in organic and aqueous solutions via novel chemodosimeter approach named as nucleophilic aromatic substitution of hydrogen (NASH). Moreover, novel biological important benzisoxazole derivative has been synthesized with cyanide-induced ring closing mechanism.

[Full Papers]
Ergin Keleş, Assoc. Prof. Dr. Burcu Aydıner, Assoc. Prof. Dr. Yahya Nural, Prof. Dr. Nurgül Seferoğlu, Prof. Dr. Ertan Şahin, Zeynel Seferoğlu
doi.org/10.1002/ejoc.202000342

The Suzuki-Miyaura Cross-Coupling as the Key Step in the Synthesis of 2-Aminobiphenyls and 2,2'-Diaminobiphenyls: Application in the Synthesis of Schiff Base Complexes of Zn

25 June, 2020 - 00:00

The Suzuki-Miyaura reaction is used as a key step for the synthesis of 2-aminobiphenyls and 2,2'-diaminobiphenyls, which in turn can be utilized to make Schiff base complexes of Zn. Special emphasis is on the cross-coupling reaction between 2-bromoanilines and a 2-nitro-substituted arylboronic acid, for which there is little existing precedence.

[Full Papers]
Knut Tormodssønn Hylland, Dr. Sigurd Øien-Ødegaard, Prof. Mats Tilset
doi.org/10.1002/ejoc.202000599

A Decade of Indium-Catalyzed Multicomponent Reactions (MCRs)

25 June, 2020 - 00:00

Indium catalysis applied to multicomponent reactions is a thriving field in organic synthesis. In this work, we revisited the main achievements in indium-catalyzed multicomponent reactions, showcasing the versatility of the different indium-based catalysts, from simple indium powder, to inexpensive and easily available indium salts, to more complex heterogeneous catalytic systems, such as indium-based metal-organic frameworks and nanoparticles.

[Minireview]
Pedro Brandão, Prof. Dr. Anthony J. Burke, Prof. Dr. Marta Pineiro
doi.org/10.1002/ejoc.202000596

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