Results 101 to 110 of about 665,789 (291)

Convergent Asymmetric Disproportionation Reactions: Metal Broslash;nsted Acid Relay Catalysis for Enantioselective Reduction of Quinoxalines

open access: yes, 2011
Convergent Asymmetric Disproportionation Reactions: Metal/Broslash;nsted Acid Relay Catalysis for Enantioselective Reduction of ...
段英   +6 more
core  

Pulsed Oxidative–Reductive Electrolysis Over Dual Cu and Co Single‐Atom Sites for Urea Electrosynthesis

open access: yesAdvanced Materials, EarlyView.
Alternating oxidative–reductive pulses synchronize CO2‐derived *CO and NH3‐derived *NHx intermediates over dual Cu and Co single‐atom sites, enabling urea and ethyl urea formation with a total C─N Faradaic efficiency of 42 ± 4%. In situ spectroscopy and theoretical calculations elucidate complementary Cu and Co functions, while oxidative controls ...
Putri Ramadhany   +8 more
wiley   +1 more source

Organocatalytic atroposelective construction of axially chiral arylquinones

open access: yesNature Communications, 2019
Axially chiral compounds have widespread use in asymmetric catalysis. Here, the authors disclose a highly enantioselective synthesis of axially chiral o-naphthoquinones by chiral phosphoric acid catalysis and central-to-axial chirality conversion.
Shuai Zhu   +8 more
doaj   +1 more source

Chiral Phonon–Driven Ultrafast Spin Currents in a Non‐Magnetic Ferroelectric

open access: yesAdvanced Materials, EarlyView.
Broadband terahertz emission spectroscopy shows signatures of ultrafast spin‐current generation in non‐magnetic ferroelectric β$\beta$’‐In2Se3${\rm In}_2{\rm Se}_3$. Reversal of the emitted field upon sample inversion and substitution of Pt with W indicates spin‐Hall‐mediated charge conversion, while polarization‐resolved measurements reveal ...
Thomas B. Gill   +16 more
wiley   +1 more source

From Dark Photocatalysis to Photobattery‐Type Operation: A Re‐Functionalized Ti‐MOF for Solar Energy Storage

open access: yesAdvanced Materials, EarlyView.
ReCl47‐bpy is developed as a solar‐rechargeable, Re‐functionalized two‐dimensional metal–organic framework (MOF) for light‐driven charge storage and dark utilization. Re–bipyridine sites stabilize photoinduced electrons, enabling two complementary configurations: a MOF suspension for long‐lived charge retention and dark H2 evolution, and a spin‐coated ...
Shufan Wu   +8 more
wiley   +1 more source

Allenes in Asymmetric Catalysis: Asymmetric Ring Opening of meso-Epoxides Catalyzed by Allene-Containing Phosphine Oxides

open access: yes, 2016
Allenes in Asymmetric Catalysis: Asymmetric Ring Opening of meso-Epoxides Catalyzed by Allene-Containing Phosphine ...
Xiangbing Qi (2053555)   +2 more
core   +3 more sources

Chiral phosphonium ion-pairing catalysis: From structural innovation to asymmetric synthesis

open access: yesChemical Engineering Journal Advances
Chiral phosphonium salt catalysis has emerged as a crucial component of asymmetric ion-pairing catalysis, demonstrating growing significance in the field of asymmetric catalytic synthesis.
Wenchao Chen   +3 more
doaj   +1 more source

Synthesis of Ti2B2Clx MBenes in Molten Salts From Theoretical and Experimental Perspectives

open access: yesAdvanced Materials, EarlyView.
By integrating a theoretical framework with experiments, Ti2InB2 was selectively etched with ZnCl2 to produce a multilayer (ml) Ti2B2Clx MBene. The In atoms are completely removed, with simultaneous incorporation of chlorine surface terminations. in situ x‐ray diffraction indicates a direct biphasic transformation from Ti2InB2 to ml‐MBene, with no ...
Rodrigo M. Ronchi   +15 more
wiley   +1 more source

Wafer‐Scale Direct Growth of Ultraclean Monolayer Amorphous Carbon on c‐Sapphire by Remote Catalytic Dehydrogenation

open access: yesAdvanced Materials, EarlyView.
Remote catalytic dehydrogenation enables the direct growth of monolayer amorphous carbon on a 2‐inch sapphire wafer by thermal CVD. Spatial separation of the catalyst from the growth substrate eliminates metallic residue and post‐growth processing, yielding a wafer‐scale uniform film with a random polygonal sp2‐hybridized carbon network that exhibits ...
Muhammad Sabbtain Abbas   +8 more
wiley   +1 more source

Asymmetric Catalysis with Libraries of Palladium β-Turn Phosphine Complexes

open access: yes, 2016
Asymmetric Catalysis with Libraries of Palladium β-Turn Phosphine ...
Scott R. Gilbertson (1546036)   +2 more
core   +1 more source

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