Results 141 to 150 of about 973 (203)

Silylium‐Ion‐Initiated Disulfidation of Internal Alkynes With Disulfides

Chemistry – A European Journal, EarlyView.
Silylium‐ion initiation enables the disulfidation of internal alkynes with diaryl disulfides. The catalytic turnover is maintained by the sulfonium ion ArS(ArSSAr)+ as a sulfenium‐ion carrier that reacts with an alkyne to form a thiirenium ion. Its ring opening by disulfide addition yields the 1,2‐bis(arylthio)‐substituted alkene product with E:Z > 95 ...
Dáiríne M. Morgan, Hendrik F. T. Klare, Martin Oestreich   +2 more
wiley   +1 more source

Sustainable Germanium Recovery From Germanium Dioxide via Halogen‐Free Chemical Vapor Transport

Chemistry – A European Journal, EarlyView.
Recovery of the critical element Ge from GeO2 and SiO2/GeO2 mixtures was investigated based on an endothermic chemical vapor transport via GeO, formed with natural gas or a hydrogen(10%)‑argon(90%) mixture and water vapor. (This picture was partly created with AI, engine: Adobe Firefly).
Julian Burkhart, Christian A. Bömer, Jana Milanovic, Victoria S. Drescher, Igor Atanasov, Moritz Maxeiner, Klaus Müller‑Buschbaum   +6 more
wiley   +1 more source

Extracellularly Activatable Conjugates of RGD Peptidomimetics and Cryptophycin for αVβ3‐Targeted Cancer Therapy

Chemistry – A European Journal, EarlyView.
Integrin αVβ3‐targeting small‐molecule drug conjugates (SMDCs) were synthesized by conjugating a cryptophycin payload through a neutrophil elastase‐cleavable NPV‐PABC linker. RGD peptidomimetic and linker epimers served as controls for targeting and enzymatic cleavage, and the resulting conjugates displayed subnanomolar cytotoxicity in vitro.
Dominic Seißenschmidt, Henriette Hartung, Jonah Kammer, Norbert Sewald   +3 more
wiley   +1 more source

Nitrooxylation in Organic Synthesis: From Classical Nitrate Ester Formation to Modern Catalytic Strategies

Chemistry – A European Journal, EarlyView.
Nitrooxylation—the installation of nitrate esters (–ONO2) has evolved from classical mixed‐acid protocols to catalytic and mechano‐, flow‐, photo‐, and electrochemical strategies. This review delineates ionic and radical manifolds for C–ONO2 bond formation, emphasizing mechanistic control, selected substrate scope, and selectivity.
Jayanta Dey, Dmitry Katayev
wiley   +1 more source

Mild C─F Activation of Azido(per)Fluoroalkanes

Chemistry – A European Journal, EarlyView.
Mild and selective activation of C(sp3)–F bonds in azido(per)fluoroalkanes using thiolates was developed, leading to novel functionalized azides. The reaction is initiated by nucleophilic attack of the sulfur atom to the terminal nitrogen of the azido group, followed by fluoride ion elimination.
Olena Shaitanova, María Martínez Mallo, Sergii Suikov, Blanka Klepetářová, Josef Filgas, Petr Slavíček, Lucie Bednárová, Petr Beier   +7 more
wiley   +1 more source

The Rich Chemistry of Ionized Methanol With Sulfur Dioxide: Pathways to Prebiotic and Elusive Species in Earth's Atmosphere and Space

Chemistry – A European Journal, EarlyView.
The reaction between the methanol radical cation and sulfur dioxide is remarkably fast and forms several ionic and neutral products (HOSOH+, CH2OSO+, CH2OH+, CH2O, H2O, HSO2). The chemistry goes beyond simple proton or hydrogen transfer, revealing a close interaction between the two species, relevant to atmospheric and astrochemical environments where ...
Mauro Satta, Daniele Catone, Mattea Carmen Castrovilli, Antonella Cartoni   +3 more
wiley   +1 more source

Syntheses and Properties of Pentafluoroethylplumbanes in the Oxidation States +II, +III, and +IV

Chemistry – A European Journal, EarlyView.
Syntheses of pentafluoroethyl substituted plumbanes in the formal oxidation states +II, +III, and +IV are reported. The compounds were characterized by multinuclear NMR spectroscopy, including 207Pb NMR spectroscopy, mass spectrometry and single‐crystal x‐ray diffraction experiments. ABSTRACT Mono‐, bis‐, and tris(pentafluoroethyl)plumbanes of the type
Michael Grasse, Lukas Hartmann, Beate Neumann, Hans‐Georg Stammler, Berthold Hoge   +4 more
wiley   +1 more source

Bismuth Chalcogenide‐Based Photocatalysts for Nitrogen Reduction: Recent Progress and Prospects

Chemistry – A European Journal, EarlyView.
Bismuth chalcogenides emerge as promising visible‐light photocatalysts for sustainable ammonia synthesis, driven by tunable electronic structures and strong N2 activation. Recent advances reveal how defects, doping and heterojunction design synergistically enhance charge separation and reactivity. Key challenges and future directions highlight pathways
Mukesh K. Verma, Muhammad D. Bala, Phindile B. Khoza, Tshephiso R. Papo, Mzamo L. Shozi   +4 more
wiley   +1 more source

Influence of Particle Size, Moisture, and Cloud Density on Wood Dust Ignition

Chemie Ingenieur Technik, EarlyView.
The ignition and combustion of particle clouds are strongly affected by particle interactions. This study uses spectroscopy to examine effects of particle size, water content, and cloud density. Results show ignition delay rises with larger size and density, whereas combustion duration depends mainly on water and density due to moisture‐driven ...
Matteo Giesen, Daniel Bernhardt, Michael Beckmann   +2 more
wiley   +1 more source

Internal Carbon Cycles in the Steel Industry: Pathways for CO2 Management and Carbon Capture Utilization

Chemie Ingenieur Technik, EarlyView.
The steel industry accounts for about 7%‐9% of global CO2 emissions. While H2‐based direct reduction is a long‐term route, near‐term solutions are needed for existing plants. Internal carbon cycles reuse steelworks off‐gases and by‐products, enabling circular carbon use and supporting CCU integration.
Florian Haakmann, Nina Kolbe, Julian Suer, Cássia Castro Müller, Nils Jäger   +4 more
wiley   +1 more source