Angewandte Chemie

Wiley Online Library : Angewandte Chemie

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Titanium defective sites in TS‐1: structural insights by combining spectroscopy and simulation

Ti silicates, and in particular Titanium Silicalite‐1 (TS‐1), are nowadays important catalysts for several partial oxidation reactions in the presence of aqueous H 2 O 2 as oxidant. Despite the numerous studies dealing with this material, some fundamental aspects are still unfathomed. In particular, the structure and the catalytic role of defective...

Mechanistic Insights into C(sp2)‐C(sp)N Reductive Elimination from Gold(III) Cyanide Complexes

A new family of phosphine‐ligated dicyanoarylgold(III) complexes has been prepared and their reactivity towards reductive elimination has been studied in detail. Both, a highly positive entropy of activation and a primary 12/13 C KIE suggest a late concerted transition state while Hammett analysis and DFT calculations indicate that the process is...

Unravelling the Enigma of Nonoxidative Conversion of Methane on Iron Single‐Atom Catalysts

The direct, nonoxidative conversion of methane on silica‐confined single‐atom iron catalyst (Fe 1 ©SiO 2 ) by Bao et al . ( Science , 2014, 344 , 616) is a landmark discovery in catalysis science. However, the initially proposed gas‐phase reaction mechanism has been much debated. Here, we report a surface reaction mechanism by comprehensive...

Exploiting Two‐Dimensional Bi2O2Se for Trace Oxygen Detection

Two‐dimensional (2D) materials host great potential for environmental gaseous molecules detection in the age of emerging Internet of things owing to their fascinating electronic properties, large surface‐to‐volume ratio and feasibility to high integration. However, it remains a challenge to develop trace oxygen sensing 2D materials and devices with...

Interfacially Bridging Covalent Network Yields Hyperstable and Ultralong Virus‐based Fibers for Engineering Functional Materials

Virus and virus‐like particles (VLPs) are very attractive biological subjects for self‐assembly manipulation and templated synthesis of nanomaterials. However, the fundamental studies and applications are often constrained by problems associated with their structural weakness. Here we present a strategy of interfacially bridging covalent network within...

Spin Filtering Along Chiral Polymers

Spin‐dependent conduction and polarization in chiral polymers were studied for polymers organized as self‐assembled monolayers with conduction along the polymer backbone, namely, along its longer axis. Large spin polarization and magnetoresistance effects were observed, showing a clear dependence on the secondary structure of the polymer. The results...

Single‐molecule 3D orientation imaging reveals nanoscale compositional heterogeneity in lipid membranes

In soft matter, thermal energy causes molecules to continuously translate and rotate, even in crowded environments, thereby impacting the spatial organization and function of most molecular assemblies, such as lipid membranes. Directly measuring the orientation and spatial organization of large collections (>3000 molecules/µm 2 ) of single molecules...

Revealing the A‐site effect of lead‐free A3Sb2Br9 perovskite in photocatalytic C (sp3)‐H bonds activation

Lead‐free halide perovskite of A 3 Sb 2 Br 9 is utilized as photocatalyst for the first time to C (sp 3 )‐H bonds activation. A 3 Sb 2 Br 9 nanoparticles (A 3 Sb 2 Br 9 NPs) with different ratios of Cs and MA show different photocatalytic activity for toluene oxidation and the photocatalytic performance is enhanced when increasing...

Functional genome mining reveals a novel class V lanthipeptide containing a D‐amino acid introduced by an F420H2‐dependent reductase

Lantibiotics are a type of ribosomally synthesized and post‐translationally modified peptides (termed lanthipeptides) with often potent antimicrobial activity. Herein, we report the discovery of a new lantibiotic, lexapeptide, using the Library EXpression Analysis System (LEXAS) approach. Lexapeptide has rare structural modifications, including N‐terminal...

Beyond polysulfides shuttle and Li dendrite formation: addressing the sluggish S redox kinetics for practical high energy Li‐S batteries

Electrolyte modulation has been reported to simultaneously suppress polysulfide shuttle effect and lithium dendrite formation of lithium‐sulfur (Li‐S) batteries. However, the sluggish S redox kinetics, especially under high S loading and lean electrolyte operation, has been intensively ignored, which dramatically limits the cycle life and energy density...

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