Results 101 to 110 of about 32,232 (288)

The Effect of Pore Functionality in Multicomponent Covalent Organic Frameworks on Stable Long‐Term Photocatalytic H2 Production

open access: yesAdvanced Energy Materials, EarlyView.
Five COFs are synthesized through a multicomponent reaction, preserving a similar backbone while introducing varying pore functionalities. All COFs demonstrate excellent chemical stability and sustained H2 production under sunlight for 7‐15 days. The imidazole‐functionalized COF exhibits the highest H2 production, which can be attributed to its high ...
Prasenjit Das   +18 more
wiley   +1 more source

Direct Activation of Sulfides by C–H Oxidation with Photoexcited Nitroarenes: Formal Manipulations of the C─S Bond

open access: yesAngewandte Chemie, EarlyView.
Photochemical anaerobic oxidation of sulfides, using nitroarenes as bifunctional reagents, enables the formal manipulation of the C─S bond. The method allows direct and selective access to versatile carbonyl compounds from largely inert sulfides by C–H oxidation, thus avoiding multistep activation by sulfur oxidation.
Valentina D. Cuomo   +2 more
wiley   +2 more sources

Evaluation and Characterization of SEI Composition in Lithium Metal and Anode‐Free Lithium Batteries

open access: yesAdvanced Energy Materials, EarlyView.
This article emphasizes the pivotal role of solid electrolyte interphase (SEI) stability in enhancing the performance of lithium‐metal and anode‐free batteries. It illustrates how innovative additives, fluorinated electrolytes, and in situ methods improve SEI conductivity, durability, and its development under real‐world conditions.
Karthik Vishweswariah   +5 more
wiley   +1 more source

Ir‐Catalyzed Sulfur‐Directed Vinylic C─H Activation for the Stereoselective Synthesis of 1,3‐Dienes Using Alkynoates

open access: yesAsian Journal of Organic Chemistry, EarlyView.
Ir‐catalyzed sulfur‐directed C─H alkenylation of alkynoates proceeded by using aryl methallyl sulfides. When DMAD was employed, 1,3‐dienes were initially formed and subsequently underwent thermal 1,5‐sigmatropic rearrangement to yield secondary products with high stereoselectivitiy.
Takanori Shibata, Haru Marumo
wiley   +1 more source

Advancing Sulfinyl Radical Chemistry: An Asymmetric Smiles Rearrangement with Chiral Sulfoxides

open access: yesAngewandte Chemie, EarlyView.
A visible‐light‐driven, asymmetric sulfinyl‐Smiles rearrangement enables the enantioselective trifunctionalization of chiral sulfoxides via radical addition, 1,5‐aryl migration, and sulfinyl radical interception. By tuning the redox potentials of key components, this cascade forms two C─C and one C─S bond in a single step, yielding enantioenriched ...
Yawen Hu, Till Schreyer, Cristina Nevado
wiley   +2 more sources

Click Chemistry‐Enabled Synthesis of Diversely Functionalized Cyclobutenes

open access: yesAsian Journal of Organic Chemistry, EarlyView.
This work expands the synthetic scope of a [2 + 2] click chemistry cycloaddition between ethene‐1,1‐disulfonyl fluoride (EDSF) and a diverse library of alkynes to access 29 highly functionalized cyclobutenes. Substrate variation, including electron‐withdrawing and electron‐donating groups, enables precise regiocontrol.
Christopher J. Smedley
wiley   +1 more source

Versatile Halide‐Pair‐Driven Multicomponent Polymerization for Library Synthesis of Sequence‐Controlled Semiconducting Dendronized Polymers

open access: yesAngewandte Chemie, EarlyView.
A halide‐pair‐driven multicomponent polymerization (MCP) strategy enables the efficient synthesis of diverse sequence‐controlled semiconducting poly(triarylamine)s (PTAAs), including dendronized variants, advancing the development of next‐generation organic materials.
Hae‐Nam Choi   +9 more
wiley   +2 more sources

π‐Electron Donation at the Sulfoximidoyl Nitrogen Atom

open access: yesAngewandte Chemie, EarlyView.
Density functional theory (DFT)‐based evidence for a strong positive mesomeric effect (+M‐effect) of the sulfoximidoyl group at N is presented. Our findings contrast with common characterizations of the sulfoximidoyl group as an exclusively electron‐withdrawing moiety.
Benjamin J. Statham   +2 more
wiley   +2 more sources

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