Chemistry - A European Journal

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Proton‐Functionalized Graphitic Carbon Nitride for Efficient Metal‐Free Disinfection of Escherichia Coli under Low‐Power Light Irradiation

Universal access to clean water has been the global ambition over the years. Photocatalytic water disinfection via advanced oxidation processes has been regarded as one of the promising methods in breaking down microbials. The forefront of this research focuses on the application of metal‐free photocatalysts for disinfection to prevent secondary pollution....

Rhodium‐Catalyzed Chemodivergent Regio‐ and Enantioselective Allylic Alkylation of Indoles

The control of C3/N1 chemo‐selectivity with the same electrophiles is still challenging in the indole alkylation. A Rh/bisoxazolinephosphine‐catalyzed chemodivergent regio‐ and enantioselective allylic alkylation of unbiased indoles has been developed. Chiral C3‐ and N1‐allylindoles can be selectively obtained in high branch/linear ratio and up to 99%...

Catalytic Arylative Endo Cyclization of Gold Acetylides: Access to 3,4‐Diphenyl Isoquinoline, 2,3‐Diphenyl Indole, and Mesoionic Normal NHC–Gold Complex

Cyclization: 3,4‐Diphenyl isoquinoline and 2,3‐diphenyl indole have been synthesized by catalytic bis‐arylative endo cyclization of gold acetylides. By this synthetic approach, a six‐membered mesoionic NHC–complex has also been obtained, which could be used as precursors for the synthesis of 1,3‐NHDC Au2 and Au/Ag complexes. Catalytically relevant vicinal...

Photocontrolled DNA Origami Assembly by Using Two Photoswitches

Let there be light! An arylazopyrazole (AAP) photoswitching system is introduced to extend the variety of available wavelengths of photoswitches to control the photoinduced assembly and disassembly of DNA origami nanostructures. Different assembly configurations are also achieved by using two photoswitches, AAP and azobenzene, in tandem with different...

Ultrafast Charge Delocalization Dynamics of Ambient Stable CsPbBr3 Nanocrystals Encapsulated in Polystyrene Fiber

Perovskites in polystyrene: The stability of perovskites is a major concern for practical applications. To overcome this problem, ambient stable CsPbBr3 nanocrystals (NCs) encapsulated in transparent polystyrene fibers (CsPbBr3@PS) were prepared by electrospinning. The encapsulated fibers were found to be stable under water for months while retaining...

Galectin–Glycan Interactions: Guidelines for Monitoring by 77Se NMR Spectroscopy, and Solvent (H2O/D2O) Impact on Binding

Selenoglycosides offer attractive benefits over natural O‐glycans for studying molecular recognition processes, such as access to specific 77Se NMR spectroscopy. We evaluate NMR methods for 1H,77Se correlation, including the new selective HeHaHa experiment. We show that the thermodynamics of selenodigalactoside binding to human galectins remains unaltered,...

Enhanced Adsorption of Polysulfides on Carbon Nanotubes/Boron Nitride Fibers for High‐Performance Lithium‐Sulfur Batteries

Endurance cyclists: We developed a novel sulfur cathode by intertwining multi‐walled carbon nanotubes (CNTs) and boron nitride fibers (BNFs). The intertwined structure served to localize the lithium polysulfide dissolved in the electrolyte within the cathode region, leading to low active sulfur loss and improved cycling stability. Cycled at 4 C, the...

Stimuli‐Sensitive Self‐Assembled Tubules Based on Lysine‐Derived Surfactants for Delivery of Antimicrobial Proteins

Self‐assembled tubules composed by novel lysine‐derived surfactants form hydrogels and undergo a temperature‐driven transition to micelles or vesicles. The tubule‐based hydrogels are able to efficiently load lysozyme (LZM), a model antimicrobial enzyme, and to release it upon temperature or pH changes. Both the neat surfactant and surfactant/LZM hydrogels...

Aerobic Copper‐Catalyzed Salicylaldehydic Cformyl–H Arylations with Arylboronic Acids

We report a challenging copper‐catalyzed Cformyl−H arylation of salicylaldehydes with arylboronic acids, which involves unique salicylaldehydic copper‐species differing from reported salicylaldehydic rhodacycle and palladacycle. Also, this protocol has high chemoselectivity for the Cformyl−H bond compared to the phenolic O−H bond involving copper catalysis...

Total Synthesis of (‐)‐Lepadin F based on a stereoselective Diels‐Alder reaction controlled by a ketolactone‐type dienophile

An effcient approach to the type III lepadin alkaloids (lepadins F and G) has been developed via a key Diels−Alder reaction, in which a novel ketolactone‐type dienophile with chiral diol unit is employed to generate the desirable all‐cis‐trisubstituted cyclohexene in excellent regio‐ and stereoselectivity control. The subsequent selective sulfonylation...

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