Results 51 to 60 of about 39,473 (242)

Catalysis by Activated Copper Sulphide [PDF]

open access: yesNature, 1941
60 gm. carefully purified acetaldehyde and 30 gm. copper sulphide, activated by oxidizing a part of its surface into cupric sulphate, were sealed in a tube of Pyrex glass and kept at 15–20° for 24 days. At the end of this time, 60 per cent of the reactant was converted into paraldehyde, which was identified by determining the boiling point, the melting
openaire   +1 more source

Chitin‐Derived Carbon‐Metal Functional Materials

open access: yesAdvanced Functional Materials, EarlyView.
Functional carbon materials are synthesized from combination of biopolymer (chitin) and iron precursors. The resultant material exhibits superior surface area and adsorptive properties compared to carbon materials synthesized directly from pure chitin.
Herry Fang   +7 more
wiley   +1 more source

Photocatalytic enantioselective α-aminoalkylation of acyclic imine derivatives by a chiral copper catalyst

open access: yesNature Communications, 2019
Copper-based asymmetric photocatalysis has great synthetic potential, however it has been rarely exploited due to challenges inherent to such systems. Here, a chiral bisoxazoline copper catalyst is involved in a SET process, photoredox catalysis, Lewis ...
Bowen Han, Yanjun Li, Ying Yu, Lei Gong
doaj   +1 more source

Pd-CuFe Catalyst for Transfer Hydrogenation of Nitriles: Controllable Selectivity to Primary Amines and Secondary Amines

open access: yesiScience, 2018
Summary: A multicomponent nanocatalyst system was fabricated for the transfer hydrogenation of nitrile compounds. This catalyst system contains palladium, copper, and iron, which are supported on the magnetite nanospheres, and the loading of palladium ...
Lei Liu   +13 more
doaj   +1 more source

Photo and copper dual catalysis for allene syntheses from propargylic derivatives via one-electron process

open access: yesNature Communications, 2022
Transition-metal-catalyzed couplings of propargylic alcohol derivatives with organometallic reagents proceeds via two-electron transformations, which present limitations in scope and selectivity.
Qi Liu   +3 more
doaj   +1 more source

Programming Nanoscale Reaction Environments via Peptide Localization for Gold Nanoparticle Growth in Liposomal Nanoreactors

open access: yesAdvanced Functional Materials, EarlyView.
The liposome nanoreactor method enables uniform metal nanoparticle synthesis using the interior as a reaction environment. We demonstrate that peptide sequences and lipid compositions act as a functional molecular switch to control reaction environments in liposome nanoreactors.
Yuya Abe   +6 more
wiley   +1 more source

Recent Advances in Enhancing Functionalization of Atomically Precise Copper Hydride Clusters

open access: yesAggregate
Copper hydride clusters have become especially fascinating in the field of functional cluster‐based materials due to the various compositions and architectures as well as intriguing properties especially hydride‐related applications.
Miao‐Miao Zhang   +6 more
doaj   +1 more source

Electrocatalytic water oxidation by Cu(ii) complexes: influence of ternarification and chelate ring size [PDF]

open access: yesRSC Advances
The electrocatalytic water oxidation activity of two mononuclear ternary copper(ii) complexes, 1 [CuII(L1H)(L2)](ClO4)2 [L1H = N1-(2-aminoethyl)ethane-1,2-diamine and L2 = pyridin-2-ylmethanamine] and 2 [CuII(L1H)(L3)](ClO4)2 [L3 = 2-(pyridin-2-yl)ethan ...
Pranjal Das   +3 more
doaj   +1 more source

High-valent organometallic copper and palladium in catalysis [PDF]

open access: yesNature, 2012
Copper and palladium catalysts are critically important in numerous commercial chemical processes. Improvements in the activity, selectivity and scope of these catalysts could drastically reduce the environmental impact, and increase the sustainability, of chemical reactions.
Amanda J, Hickman, Melanie S, Sanford
openaire   +2 more sources

Dimensionality‐Driven Interfacial Electronic Coupling in Carbon‐Supported Gd‐CuO Catalysts for Selective CO2 Electroreduction to Ethylene

open access: yesAdvanced Functional Materials, EarlyView.
The 2D carbon‐supported Gd–CuO exhibits strong interfacial electronic coupling, abundant oxygen vacancies, and highly exposed active sites, enabling efficient CO enrichment and C─C coupling toward selective and durable CO2‐to‐C2H4 conversion. ABSTRACT Copper‐based catalysts are promising for electrochemical CO2 reduction toward value‐added chemicals ...
Xueya Zhu   +11 more
wiley   +1 more source

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