Results 141 to 150 of about 2,584,295 (232)

Dimensional Reduction of Transition Metal Dichalcogenides by Oxide Insertion: Quasi‐1D Oxychalcogenide Semiconductors

open access: yesAngewandte Chemie, EarlyView.
Molecular Scissors: Oxide insertion slices the layers of MQ2 transition metal dichalcogenides (TMDs) into one‐dimensional [M3Q6] nanoribbons, giving a new family of A2Hf3Q6O (A = K, Rb, Cs; Q = S, Se) oxychalcogenides. The heteroanion‐driven dimensional reduction yields direct‐gap semiconductors with optical absorption that is tunable across the ...
Ayat Tassanov   +6 more
wiley   +2 more sources

Reverse Haptic Alerting: Human‐Centered Intelligent Systems That Turn Chemical and Biomedical Signals Into Felt Cues

open access: yesAdvanced Intelligent Systems, EarlyView.
Wearable sensors usually warn through sight or sound, channels that become unreliable under protective equipment or in noise. Reverse haptic alerting inverts this flow: Stimuli‐responsive materials convert chemical and biological signals into cues felt through the skin, while a machine‐learned digital twin of tactile perception personalizes the body ...
Hwanhee Yoo   +5 more
wiley   +1 more source

Mechanochemical Defluorination of Polytetrafluoroethylene (PTFE) With Base Metals

open access: yesAngewandte Chemie, EarlyView.
Polytetrafluoroethylene (PTFE) mechanochemically reacts with safe‐to‐handle, abundant, and inexpensive base metals Zn and Al, as well as with metals like Cd and Pb, to produce sp2‐carbon and industrially important metal fluorides. The reactivity presents PTFE as a mechanochemical fluorination agent, with opportunities for closed‐loop reductive ...
Anže Zupanc   +10 more
wiley   +2 more sources

Disorder Beats Order: Carbon Microstructure Steers Radical Versus Cationic Pathways in Kolbe Electrolysis

open access: yesAngewandte Chemie, EarlyView.
Less graphitic, more Kolbe: carbon microstructure steers selectivity in Kolbe electrolysis. Disordered, sp3‐rich carbon electrodes with high charge‐transfer resistance favor surface radical pathways, giving about an order of magnitude more Kolbe dimer than graphitized sp2‐rich counterparts.
Md Mosaddek Hossen   +3 more
wiley   +2 more sources

Double Reduction of Ph3B to a Dianionic Borane With a Powerful SrI Intermediate

open access: yesAngewandte Chemie, EarlyView.
Although dianionic boranes follow the octet rule and are isoelectronic to carbanions or amines, the high electron density combined with the electropositive nature of the B center make them highly unstable species. In this study, we present synthesis and full characterization of a complex in which Ph3B2− is sandwiched between two Sr2+ ions and describe ...
Michael Morasch   +4 more
wiley   +2 more sources

Operando X‐Ray Micro‐Imaging Reveals Spatiotemporal Evolution of the Oxidation State of Nickel During Dry Methane Reforming

open access: yesAngewandte Chemie, EarlyView.
Operando X‐ray micro‐imaging enables quantitative determination of spatially resolved nickel redox rates during the process of dry reforming of methane and its subsequent regeneration. The support composition governs the local nickel redox dynamics, thereby exhibiting different local nickel reduction and oxidation rates. The spatiotemporal Ni oxidation
Sofie Ferwerda   +6 more
wiley   +2 more sources

Polypyridyl Coordination Motifs as Precursors for Ordered Carbonaceous Frameworks Toward High‐Density Ru Single‐Atom Catalysts

open access: yesAngewandte Chemie, EarlyView.
Here, we introduce a molecular design principle that fundamentally expands the bottom‐up synthesis of single‐atom catalysts (SACs). Coordinatively flexible polypyridyl units enable bottom‐up formation of ordered carbonaceous frameworks containing atomically dispersed Ru (∼11 wt%) by simple carbonization.
Koki Chida   +13 more
wiley   +2 more sources

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