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Advanced Search Results For "COBALT"

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 "COBALT"
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Exploring potential opportunities for the efficient development of the cobalt industry in China by quantitatively tracking cobalt flows during the entire life cycle from 2000 to 2021.

Publication Type:Academic Journal

Source(s):Journal of environmental management [J Environ Manage] 2022 Sep 15; Vol. 318, pp. 115599. Date of Electronic Publication: 2022 Jun 30.

Abstract:Owing to its key role in high-tech industry and clean energy technology, cobalt has been regarded as a critical material in many countries. In this paper, material flow analysis was used to quantitatively track cobalt material flows in China throughout...

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Cobalt/Salox-Catalyzed Enantioselective Dehydrogenative C-H Alkoxylation and Amination.

Publication Type:Academic Journal

Source(s):Angewandte Chemie (International ed. in English) [Angew Chem Int Ed Engl] 2022 Sep 19; Vol. 61 (38), pp. e202210106. Date of Electronic Publication: 2022 Aug 17.

Abstract:The past decade has witnessed a rapid progress in asymmetric C-H activation. However, the enantioselective C-H alkoxylation and amination with alcohols and free amines remains elusive. Herein, we disclose the first enantioselective dehydrogenative C-H ...

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Plasma-Assisted Dinitrogen Activation on Small Cobalt Clusters: Co 4 N 9 + with Enhanced Stability.

Publication Type:Academic Journal

Source(s):Chemphyschem : a European journal of chemical physics and physical chemistry [Chemphyschem] 2022 Sep 05; Vol. 23 (17), pp. e202200288. Date of Electronic Publication: 2022 Jun 29.

Abstract:We have performed a study on the accommodation of nitrogen doping toward superatomic states of transition metal clusters. By reacting cobalt clusters with N 2 in the presence of plasma radiation, a large number of odd-nitrogen clusters were observed, t...

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Assessing the environmental risk and mobility of cobalt in sediment near nonferrous metal mines with risk assessment indexes and the diffusive gradients in thin films (DGT) technique.

Publication Type:Academic Journal

Source(s):Environmental research [Environ Res] 2022 Sep; Vol. 212 (Pt C), pp. 113456. Date of Electronic Publication: 2022 May 12.

Abstract:The Jialing River is the tributary of the Yangtze River with the largest drainage area. In recent years, the Jialing River has suffered a series of environmental problems, such as discharge of industrial effluent and sand mining activities, which have ...

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Crucial Roles of a Pendant Imidazole Ligand of a Cobalt Porphyrin Complex in the Stoichiometric and Catalytic Reduction of Dioxygen.

Publication Type:Academic Journal

Source(s):Angewandte Chemie (International ed. in English) [Angew Chem Int Ed Engl] 2022 Aug 22; Vol. 61 (34), pp. e202208143. Date of Electronic Publication: 2022 Jul 13.

Abstract:A cobalt porphyrin complex with a pendant imidazole base ([(L 1 )Co II ]) is an efficient catalyst for the homogeneous catalytic two-electron reduction of dioxygen by 1,1'-dimethylferrocene (Me 2 Fc) in the presence of triflic acid (HOTf), as compared ...

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Azole-Directed Cobalt-Catalyzed Asymmetric Hydrogenation of Alkenes.

Publication Type:Academic Journal

Source(s):Chemistry (Weinheim an der Bergstrasse, Germany) [Chemistry] 2022 Aug 04; Vol. 28 (44), pp. e202201517. Date of Electronic Publication: 2022 Jun 20.

Abstract:The azole-directed cobalt-catalyzed asymmetric hydrogenation of alkenes has been developed with high efficiency. With this approach, chiral pyrazole compounds were obtained in quantitative yields and excellent enantioselectivities (up to 99 % ee) under...

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Pyridoxal water-soluble cobalt(II) helicates: Synthesis, structural analysis, and interactions with biomacromolecules.

Publication Type:Academic Journal

Source(s):Journal of inorganic biochemistry [J Inorg Biochem] 2022 Aug; Vol. 233, pp. 111854. Date of Electronic Publication: 2022 May 13.

Abstract:Helical complexes composed of organic ligand strands and metallic centers, called helicates, present interactions with biomacromolecules, such as deoxyribonucleic acid, as one of their main biological applications in bioinorganic chemistry. Despite the...

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Cobalt-Catalyzed Asymmetric Sequential Hydroboration/Isomerization/Hydroboration of 2-Aryl Vinylcyclopropanes.

Publication Type:Academic Journal

Source(s):Angewandte Chemie (International ed. in English) [Angew Chem Int Ed Engl] 2022 Jul 25; Vol. 61 (30), pp. e202205619. Date of Electronic Publication: 2022 Jun 10.

Abstract:A cobalt-catalyzed asymmetric sequential hydroboration/isomerization/hydroboration of 2-aryl vinylcyclopropanes was for the first time reported for the preparation of valuable chiral 1,5-bis(boronates) in good yields with excellent enantioselectivity v...

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Use of a Hydrophobic Azo Dye for the Centrifuge-Less Cloud Point Extraction-Spectrophotometric Determination of Cobalt.

Publication Type:Academic Journal

Source(s):Molecules (Basel, Switzerland) [Molecules] 2022 Jul 24; Vol. 27 (15). Date of Electronic Publication: 2022 Jul 24.

Abstract:The hydrophobic azo dye 6-hexyl-4-(2-thiazolylazo)resorcinol (HTAR, H 2 L) was studied as part of a system for the centrifuge-less cloud point extraction (CL-CPE) and spectrophotometric determination of traces of cobalt. The extracted 1:2 (Co:HTAR) com...

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A New Supramolecular Tetraruthenated Cobalt (II) Porphyrazine Displaying Outstanding Electrocatalytical Performance in Oxygen Evolution Reaction.

Publication Type:Academic Journal

Source(s):Molecules (Basel, Switzerland) [Molecules] 2022 Jul 19; Vol. 27 (14). Date of Electronic Publication: 2022 Jul 19.

Abstract:A new supramolecular electrocatalyst for Oxygen Evolution Reaction (OER) was synthesized from a central multibridging cobalt tetrapyridylporphyrazine (CoTPyPz) species by attaching four [Ru(bpy) 2 Cl] + groups. Both CoTPyPz and the tetraruthenated coba...

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