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Articles from Wiley

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The latest papers in ChemPubSoc Europe
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Towards Long Wavelength Absorbing Photodynamic Therapy Photosensitizers via the Extension of a [Ru(bipy)<sub>3</sub>]<sup>2+</sup> Core

15 agosto, 2019 - 00:00

The preparation and characterization of new RuII-containing photosensitizers, that are based on a [Ru(bipy)3]2+ core (bipy: 2,2′-bipyridine) and that are extended with methyl groups or vinyl dimethylamino groups is described. Their in-depth photophysical properties as well as (photo-)cytotoxicity against cervical cancerous HeLa cells is reported.

[Full Papers]
Johannes Karges, Olivier Blacque, Philippe Goldner, Hui Chao, Gilles Gasser
doi.org/10.1002/ejic.201900569

A Highly Stable All-Inorganic CsPbBr<sub>3</sub> Perovskite Solar Cell

15 agosto, 2019 - 00:00

In recent years, the instability of hybrid organic-inorganic halide perovskite solar cells (PSCs) has been an important challenge. This work aims to address these issues by using all-inorganic CsPbBr3 perovskite as a light absorber material.

[Full Papers]
Masood Mehrabian, Sina Dalir, Ghodrat Mahmoudi, Barbara Miroslaw, Maria G. Babashkina, Anna V. Dektereva, Damir A. Safin
doi.org/10.1002/ejic.201900562

Incorporation of PdCl<sub>2</sub>P<sub>2</sub> Complexes in Ni-MOF for Catalyzing Heck Arylation of Functionalized Olefins

15 agosto, 2019 - 00:00

Ni-MOF {[Ni8(OH)4(OH2)2(L)6]n} was used as a support for two palladium complexes of PdCl2P2 type [P = tri(1-piperidinyl)phosphine and triphenylphosphine]. The new Pd@Ni-MOF composites catalyzed the Heck arylation of estragole by iodobenzene to the corresponding stilbene with high efficiency. In contrast, more bulky eugenol was not activated under these conditions.

[Full Papers]
Stanisława Tarnowicz-Ligus, Adam Augustyniak, Anna M. Trzeciak
doi.org/10.1002/ejic.201900618

Electrochemical Oxidative C(sp<sup>2</sup>)-H Bond Selenylation of Activated Arenes

15 agosto, 2019 - 00:00

Electrochemical C-H bond selenylation of (hetero)arenes: By using an electrochemical oxidative C(sp2)-H selenylation of activated arenes approach, the desired selenylated products were regioselectively obtained in good to excellent yields. The reaction is mediated by the iodine, obtained from the oxidation of KI at the anode.

[Communications]
Anne G. Meirinho, Vinícius F. Pereira, Guilherme M. Martins, Sumbal Saba, Jamal Rafique, Antonio L. Braga, Samuel R. Mendes
doi.org/10.1002/ejoc.201900992

A Novel Catalyst-Free Synthesis of 2,2-Diaryl Enamides from Stilbenes via a Nitrene Transfer Reaction

15 agosto, 2019 - 00:00

An unexpected nitrene transfer from iminoiodinane to stilbene in absence of catalyst has been described, directly giving a series of 2,2-diaryl enamides in 28-75 % yields. This reaction involved aziridination, ring-opening of aziridine, and aromatic rearrangement, in which iminoiodinane played a dual role.

[Communications]
Yuanyuan Zhang, Wenjing Ye, Hui Zhang, Xiao Xiao
doi.org/10.1002/ejoc.201900885

Transition-Metal-Free Dehydrogenative N-N Coupling of Secondary Amines with KI/KIO<sub>4</sub>

15 agosto, 2019 - 00:00

Iodine brother do it together: With KI/KIO4, a transition-metal-free dehydrogenative N-N coupling of secondary amines has been accomplished. A diverse range of diphenylamines, carbazoles, and N-alkylanilines readily undergo N-N homo-coupling effectively. Notably, the N-N cross-coupling of two different arylamines is also demonstrated, providing a straightforward approach to complex N-N structures.

[Communications]
Dehang Yin, Jian Jin
doi.org/10.1002/ejoc.201900763

Regioselective Synthesis of 1,4,5-Trisubstituted-1,2,3-Triazoles from Aryl Azides and Enaminones

15 agosto, 2019 - 00:00

Total regioselective synthesis of 1,4,5-trisubstituted-1,2,3-triazoles has been achieved from aryl azides and enaminones. The reaction consists of a cascade starting with a water-promoted 1,3-dipolar cycloaddition followed by a base-promoted retro-aza-Michael reaction. DFT calculations support the mechanism.

[Full Papers]
Antonio De Nino, Vincenzo Algieri, Matteo A. Talllarida, Paola Constanzo, Manuel Pedrón, Tomás Tejero, Pedro Merino, Loredana Maiuolo
doi.org/10.1002/ejoc.201900889

Streamlined Routes to Phenacyl Azides and 2,5-Diarylpyrazines Enabled by Deep Eutectic Solvents

15 agosto, 2019 - 00:00

A valuable approach for the preparation of phenacyl azides and 2,5-diarylpyrazines, under mild reaction conditions and in Deep Eutectic Solvents (DESs) as environmentally responsible reaction media, is illustrated. Telescoped, one-pot, two-steps processes have also been successfully accomplished.

[Full Papers]
Paola Vitale, Luciana Cicco, Francesco Messa, Filippo Maria Perna, Antonio Salomone, Vito Capriati
doi.org/10.1002/ejoc.201900722

Synthesis of Fluorine-Containing Molecular Entities Through Fluoride Ring Opening of Oxiranes and Aziridines

15 agosto, 2019 - 00:00

The current minireview highlights the most relevant methodologies for the synthesis of fluorinated scaffolds through transformations of three-membered heterocycles (oxiranes and aziridines) involving their opening with various nucleophilic fluorinating agents reported over recent years.

[Minireview]
Attila Márió Remete, Loránd Kiss
doi.org/10.1002/ejoc.201900981

A Photoswitchable Trivalent Cluster Mannoside to Probe the Effects of Ligand Orientation in Bacterial Adhesion

12 agosto, 2019 - 00:00

Photocontrol for antiadhesive therapy: Bacterial adhesion to human cell surfaces was controlled through light-mediated reorientation of a multivalent carbohydrate epitope; this underlined the importance of orientational effects in carbohydrate recognition and likewise the value of photoswitchable glycoconjugates for their study.

[Full Papers]
Dr. Guillaume Despras, Dr. Leonhard Möckl, Dr. Anne Heitmann, Insa Stamer, Prof. Dr. Christoph Bräuchle, Prof. Dr. Thisbe K. Lindhorst
doi.org/10.1002/cbic.201900269

Photocatalytic Transformation of Amines to Imines by Meso-Porous Copper Sulfides

12 agosto, 2019 - 00:00

A to I: A visible-light-driven catalytic procedure to transform amines to imines using mesoporous copper sulfide has been demonstrated here. Surface chemistry of this heterogeneously catalyzed process was investigated using various spectroscopic methods, reaction kinetics, and by determining reactive oxygen species. The plausible reaction mechanism was found to be consistent with the reaction energies determined by Density-Functional -Theory calculations.

[Communications]
Biswanath Dutta, Laura A. Achola, Ryan Clarke, Dr. Vinit Sharma, Dr. Junkai He, Peter Kerns, Prof. Steven L. Suib
doi.org/10.1002/cctc.201900673

Nitrogen-Doped NiO Nanosheet Array for Boosted Electrocatalytic N<sub>2</sub> Reduction

12 agosto, 2019 - 00:00

It's dope! A nitrogen-doped NiO nanosheet array on carbon cloth (N-NiO/CC) exhibited enhanced NRR performance with a NH3 yield of 22.7 μg h−1 mg−1 and an FE of 7.3 % in 0.1 M LiClO4 at −0.5 V (vs. RHE), far superior to those of undoped counterparts (NiO/CC). DFT calculations revealed that the N-doping could induce enhanced surface conductivity and an upraised d-band center, leading to promoted *NNH stabilization, a reduced reaction energy barrier, and thus improved NRR performance.

[Communications]
Xiao-hu Wang, Jing Wang, Yu-biao Li, Prof. Ke Chu
doi.org/10.1002/cctc.201901075

Construction of 2D MOFs@reduced Graphene Oxide Nanocomposites with Enhanced Visible Light-induced Fenton-like Catalytic Performance by Seeded Growth Strategy

12 agosto, 2019 - 00:00

GO RGO, go! A novel construction way of 2D-nanocomposite has been reported by controlling the nucleation and growth of metal-organic frameworks (MOFs) rod-shaped particles on the surface of graphene oxide (GO) nanosheets in a facile two-step wet chemistry process. RGO is capable of acting as a template to direct the formation of 2D nanostructures and behave as an electron reservoir to modulate the separation and migration of photo-generated electrons from the MOFs.

[Full Papers]
Xiaojun Hou, Kangze Hu, Huan Zhang, Zhang Tao, Prof. Mu Yang, Prof. Ge Wang
doi.org/10.1002/cctc.201900760

Electrochemical Oxygen Reduction Reaction Performance Boosted by N, P Doped Carbon Layer over Manganese Dioxide Nanorod

12 agosto, 2019 - 00:00

Polymerization: MnO2@PANI-800 obtained by a facile approach via an in situ anile polymerization reaction based on aniline and phytic acid following thermal annealing has an outstanding catalytic performance for ORR. It can be attributed to the conductivity improvement and the synergistic effect of the intrinsic activity of manganese oxide and N, P-doped carbon layer.

[Full Papers]
Chengang Pei, Ruifu Ding, Dr. Xu Yu, Prof. Ligang Feng
doi.org/10.1002/cctc.201900886

In-situ Growth of a Bimetallic Cobalt-Nickel Organic Framework on Iron Foam: Achieving the Electron Modification on a Robust Self-supported Oxygen Evolution Electrode

12 agosto, 2019 - 00:00

Double doping: The cobalt and nickel double-doped materials in-situ grown on Fe foam exhibited an excellent electrocatalytic activity and remarkable durability with a current density of 10 mA cm−2 in a 0.1 M KOH solution with the overpotential of 264 mV and the Tafel slope of 54.3 mV dec−1. The improved OER performances were benefited from the synergy effect of electrons derived from the multi-metal and the enhanced adhesion between the MOFs and the conductive substrate.

[Full Papers]
Dr. Pei Luo, Dr. Shixiong Li, Yasi Zhao, Guojie Ye, Dr. Cong Wei, Prof. Yun Hu, Prof. Chaohai Wei
doi.org/10.1002/cctc.201900972

Reusable Pd@PEG Catalyst for Aerobic Dehydrogenative C−H/C−H Arylations of 1,2,3-Triazoles

12 agosto, 2019 - 00:00

Aerobic C−H arylations were accomplished in benign polyethylene glycol solvent. The easily reusable catalyst Pd(OAc)2 proved to be highly effective for the intramolecular oxidative C−H arylation of 1,2,3-triazoles, thus, enabling a step-economical synthesis of bio-active derivatives in a sustainable fashion (see scheme).

[Communications]
Francesco Ferlin, Dr. Santhivardhana Reddy Yetra, Dr. Svenja Warratz, Prof. Dr. Luigi Vaccaro, Prof. Dr. Lutz Ackermann
doi.org/10.1002/chem.201902901

Lattice Shrinkage by Incorporation of Recombinant Starmaker-Like Protein within Bioinspired Calcium Carbonate Crystals

12 agosto, 2019 - 00:00

Controlled growth: The starmaker-like (Stm-l) protein promotes calcium carbonate nucleation and anisotropic tailoring of crystal morphology. Intracrystalline incorporation of protein results in shrinkage of the crystal lattice volume (see figure). The ring pattern, which is composed of a protein-enriched region flanked by protein-depleted regions, is a result of both the Ostwald-like ripening process and intrinsic properties of Stm-l.

[Full Papers]
Mirosława Różycka, Ismael Coronado, Katarzyna Brach, Joanna Olesiak-Bańska, Marek Samoć, Mirosław Zarębski, Jerzy Dobrucki, Maciej Ptak, Eva Weber, Dr. Iryna Polishchuk, Dr. Boaz Pokroy, Jarosław Stolarski, Prof. Andrzej Ożyhar
doi.org/10.1002/chem.201902157

Rational Synthesis of Iron/Nitrogen-Doped Carbon Catalyst through a Spatial Isolation Strategy for Efficient Oxygen Reduction in Acidic and Alkaline Media

12 agosto, 2019 - 00:00

Adding active sites: A highly efficient iron/nitrogen-doped carbon (Fe/N-C) catalyst is synthesized through a spatial isolation strategy, involving the pyrolysis of bioinspired polydopamine (PDA)-based hybrid microsphere precursors loaded with atomically dispersed Fe3+/Zn2+ ions and N-rich melamine (see figure). The Fe-N/C catalyst exhibits superior and similar oxygen reduction reaction activities to that of Pt/C in alkaline and acidic solutions, respectively.

[Full Papers]
Bomin Feng, Xiuju Wu, Ling Li, Wei Gao, Dr. Weihua Hu, Prof. Chang Ming Li
doi.org/10.1002/chem.201902521

Ternary Complexes Stabilized by Chalcogen and Alkaline-Earth Bonds: Crucial Role of Cooperativity and Secondary Noncovalent Interactions

12 agosto, 2019 - 00:00

Cooperativity in ternary complexes: The cooperativity between chalcogen bonds and alkaline-earth bonds in ternary complexes reinforces the weakest one more (see figure).

[Full Papers]
Otilia Mó, M. Merced Montero-Campillo, Ibon Alkorta, José Elguero, Manuel Yáñez
doi.org/10.1002/chem.201901641

A Sterically Overcrowded, Isopropyl-Substituted, Lanthanide-Chelating Tag for Protein Pseudocontact Shift NMR Spectroscopy: Synthesis of its Macrocyclic Scaffold and Benchmarking on Ubiquitin S57 C and hCA II S166 C

12 agosto, 2019 - 00:00

Rigidified tag for protein NMR: Pseudocontact shifts (PCS) generated by lanthanide-chelating tags (LCTs) yield valuable structural restraints for the analysis of structure, dynamics, and ligand-binding of proteins in solution. We present here a highly rigidified LCT (see graphic) that induces strong PCS and residual dipolar couplings when attached to ubiquitin S57 C and human carbonic anhydrase II S166 C.

[Full Papers]
Daniel Joss, Maria-Sophie Bertrams, Dr. Daniel Häussinger
doi.org/10.1002/chem.201901692

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