Results 71 to 80 of about 13,481 (251)

Tailoring Liquid Crystalline Self‐Assembly and Photophysical Properties of Unsymmetrical Fluorenones via Polar Terminal Groups

Chemistry – A European Journal, EarlyView.
Novel liquid crystalline fluorenones bearing various head groups were synthesized and characterized. By alteration of the head group, N, SmC, or SmA phases were obtained, and emission properties could be tuned depending on solvent or temperature. ABSTRACT In this work, a series of novel unsymmetrical fluorenone derivatives bearing various head groups ...
Falk Feucht, Franziska Müller, Johanna Osterbrink, Anna Zens, Yann Molard, Sabine Laschat   +5 more
wiley   +1 more source

The Radical Chemistry of 2,3‐Diguanidinopyridines: Coordination and Visible‐Light Photochemistry

Chemistry – A European Journal, EarlyView.
Substitution at the pyridine core of 2,3‐diguanidinopyridines was used to develop novel redox‐active molecules with three interconvertible redox states. They are applied as redox‐active ligands in coordination chemistry. Visible‐light irradiation of the pyridine N‐benzylated molecules leads to photoconversion to a higher‐energetic isomer.
Hanna Koepcke, Etienne Engels, Elisabeth Kaifer, Hans‐Jörg Himmel   +3 more
wiley   +1 more source

Nuclear Matryoshka: Russia’s Nuclear Deployment to Belarus

Scandinavian Journal of Military Studies
In 2021, Russia announced its intention to deploy nuclear weapons to Belarus. While the presence of nuclear delivery vehicles is confirmed, it remains unclear whether nuclear warheads followed. Scholars have debated the motivations behind the deployments,
Alexander Sorg, Liviu Horovitz
doaj   +1 more source

A Homoleptic Copper(I) Acetylene Complex

Chemistry – A European Journal, EarlyView.
Ligand substitution of weakly coordinated N2 in [(N2)Cu{Al(ORF)4}] (RF = C(CF3)3) leads to the homoleptic acetylene complex [Cu(C2H2)3]+[Al(ORF)4]−, which was characterized by single crystal x‐ray diffraction, NMR, and Raman spectroscopy, as well as by extensive quantum chemical calculations. ABSTRACT We report the synthesis and characterization of the
Julie Willrett, Elisa Zöllner, Burkhard Butschke, Ingo Krossing   +3 more
wiley   +1 more source

Hydrogen Release From Silicon─Hydrogen Systems: From Surface Chemistry to Higher‐Coordinate Molecular Mechanisms

Chemistry – A European Journal, EarlyView.
Hydrogen‐release processes in silicon chemistry occur across a broad spectrum of systems, including crystalline silicon surfaces, nanoporous materials, Zintl phases, and molecular hydrides. This Review highlights how Si─H activation and H2 evolution are governed by structure, coordination environment, and dynamic access to reactive geometries, with ...
Robin Rothfelder, Jonathan O. Bauer
wiley   +1 more source

Influencing Parameters at Drum Screens for Packaging Screening

Chemie Ingenieur Technik, EarlyView.
Drum (trommel) screens are extensively utilized in the classification of packaging waste according to its particle size. The present study aims to quantify the size‐classification behaviour of elongated, hollow packaging‐like items (representing bottles, tubes and cups) using cylindrical and tubular test pieces.
Konstantin Schinkel, Bastian Küppers, Dirk Burth, Michael Rudolf Sommer, Sven Sängerlaub   +4 more
wiley   +1 more source

(Hoch‐)Spannende Experimente zur Plasmachemie

CHEMKON, EarlyView.
In den im Artikel vorgestellten Experimenten wird die Chemie atmosphärischer Luft‐Plasmen mithilfe eines kostengünstigen Tesla‐Transformators untersucht und anhand schulgeeigneter Modelle veranschaulicht. Im Mittelpunkt stehen Experimente zur Oberflächenmodifikation, Plasma‐Reinigung sowie zum Nachweis ausgewählter reaktiver Sauerstoff‐ und ...
Christoph Weidmann, Lena Bohnert, Thomas Waitz   +2 more
wiley   +1 more source

Restrict for Health or for Thinness? Liking but Not Approach Bias Differentiates Orthorexic Eating Behavior From Anorexia Nervosa in Responses to High‐Caloric Healthy vs. High‐Caloric Unhealthy Foods

International Journal of Eating Disorders, EarlyView.
ABSTRACT Objective Individuals with high levels of orthorexic eating behavior (OEB) show a (pathological) fixation on healthy eating. Shared characteristics of OEB with individuals with anorexia nervosa (AN) raised debate over whether orthorexia nervosa constitutes a distinct disorder. Distinctions may lie in preference for and approach behavior toward
Hannah van Alebeek, Mareike Röttger, Jana Strahler, Katharina Eichin, Isabella Forwick, Jens Blechert, Ulrich Voderholzer, Julia Reichenberger   +7 more
wiley   +1 more source

Selective N‐Functionalization of Pyrazoles

European Journal of Organic Chemistry, EarlyView.
This review traces the evolution of regioselective N‐functionalization strategies for pyrazoles, a key class of nitrogen heterocycles widely used in medicinal chemistry. Due to rapid tautomerism, N‐functionalization often lacks selectivity, leading to poor and unpredictable regioisomeric outcomes.
Lucas Popek, Matthias Schrader, Christopher J. Teskey   +2 more
wiley   +1 more source

Modular Synthesis of Di‐ and Triazadibenzoazulenes by a Cross‐Coupling/Cycloisomerization Strategy

European Journal of Organic Chemistry, EarlyView.
Two series of regioisomeric di‐ and triazadibenzoazulenes were prepared from dihalogenated imidazo[1,2‐a]pyridines and imidazo[1,2‐a]pyrazines. Imidazo[1,2‐a]pyridines and imidazo[1,2‐a]pyrazines are important nitrogen‐containing heterocycles with applications in medicinal and materials chemistry.
Karyna Kulyk, Artyom Petrosyan, Karsten Paul Lüdtke, Jonas Surkau, Martin Köckerling, Peter Ehlers, Peter Langer   +6 more
wiley   +1 more source