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1. Copper(I)-Catalyzed Formation of Isoquinoline and Quinoline Substituted Isobenzofurans

Author:
Chittala Emmaniel Raju; Sridhar Balasubramanian; Galla V. Karunakar
Source:
Organic letters 2022 v.24 no.15 pp. 2899-2904
ISSN:
1523-7052
Subject:
copper,   etc   ; catalysts; quinoline;     Show all 3 Subjects
Abstract:
... An efficient synthetic organic transformation was developed to access isoquinoline-substituted isobenzofurans by reaction of substituted 1,5-diynes with isoquinoline N-oxides. Moderate to excellent yields of isoquinoline-derived isobenzofurans were achieved by formation of a new C–C and two C–O bonds in the presence of copper catalyst in one pot. whereas quinoline-substituted isobenzofurans were o ...
DOI:
10.1021/acs.orglett.2c00864

2. Laser induced breakdown spectroscopy (LIBS) as a technique to detect copper in plastic and microplastic waste

Author:
Sebastián Tognana; Cristian D'Angelo; Susana Montecinos; Mariana Pereyra; Walter Salgueiro
Source:
Chemosphere 2022 v.303 pp. 135168
ISSN:
0045-6535
Subject:
copper,   etc   ; microplastics; streams;     Show all 3 Subjects
Abstract:
... Plastic waste is an environmental problematic, not only because of its own contamination, but also because it can act as a vector for other pollutants, particularly metals. In this work, taking advantage of the sensitivity of the LIBS technique, the presence of copper in plastics and microplastics present in a stream that receives effluents from a medium-sized city was determined. The influence of ...
DOI:
10.1016/j.chemosphere.2022.135168

3. Identification and analysis of iron transporters from the fission yeast Schizosaccharomyces pombe

Author:
Fawad Ahmad; Ying Luo; Helong Yin; Yun Zhang; Ying Huang
Source:
Archives of microbiology 2022 v.204 no.2 pp. 152
ISSN:
0302-8933
Subject:
copper; copper metabolism,   etc   ; Schizosaccharomyces pombe; amino acid sequences; iron; ligands; microbiology; oxidoreductases; toxicity;     Show all 9 Subjects
Abstract:
... Iron is an essential trace metal ion required for all living organisms, and is taken up by iron transporters. Here, we identified and characterized three-candidate high-affinity (Fio1, Frp1 and Frp2) and two-candidate low-affinity iron transporters (Fet4 and Pdt1) from the fission yeast Schizosaccharomyces pombe. Protein sequence analyses revealed that Fio1 is a multicopper oxidase that contains t ...
DOI:
10.1007/s00203-021-02683-y

4. Burkholderia cepacia strain IrV1 multi-resistant to copper and dyes isolated from laboratory wastewater effluent

Author:
WAHYU IRAWATI; VALENTINE LINDARTO; REINHARD PINONTOAN; TRIWIBOWO YUWONO; FEBRI MANGOMO MANGUNSONG; DESTYA WATY SILALAHI
Source:
Biodiversitas 2022 v.23 no.5 pp. -
ISSN:
2085-4722
Subject:
copper; copper sulfate,   etc   ; Burkholderia cepacia; bioremediation; color; decolorization; genes; methylene blue; nucleotide sequences; wastewater;     Show all 10 Subjects
Abstract:
... Irawati W, Lindarto V, Pinontoan R, Yuwono T, Mangunsong FM, Silalahi DW. 2022. Burkholderia cepacia strain IrV1 multi-resistant to copper and dyes isolated from laboratory wastewater effluent. Biodiversitas 23: 2614-2620. Copper and dye multi-resistant bacteria may be cultivated to increase the efficiency of waste bioremediation processes. Multi-resistant bacteria can be isolated from waste conta ...
DOI:
10.13057/biodiv/d230544

5. Impact assessment of biofouling resistant nano copper oxide–polyaniline coating on aquaculture cage nets

Author:
Pachareentavita Muhamed Ashraf; Nalini Manju Lekshmi; Shunmugavel Chinnadurai; Sajeevan Anjitha; Mathath Archana; Chirayil Meethalepurayil Vineeth Kumar; Kavitha Mandhiram Sandhya; Ambarish Purackattu Gop
Source:
Aquaculture and fisheries 2022 pp. -
ISSN:
2468-550X
Subject:
copper; copper nanoparticles,   etc   ; aquaculture; aquatic environment; bioaccumulation; biofouling; cages; fish; innovation adoption; polyaniline; polyethylene;     Show all 11 Subjects
Abstract:
... Biofouling is a major issue in aquaculture cages and nano materials based antifouling strategies became more prominent in recent years. Polyethylene aquaculture cage net surface which is modified with polyaniline and nano-copper oxide (CuO), reported to have biofouling resistance. Leaching of nano CuO from the net to the aquatic environment and its bioaccumulation in fish is the major concern agai ...
DOI:
10.1016/j.aaf.2022.01.002

6. Copper-based fungicide copper hydroxide accelerates the evolution of antibiotic resistance via gene mutations in Escherichia coli

Author:
Sumei Yu; Yingnan Wang; Fan Shen; Hua Fang; Yunlong Yu
Source:
Science of the total environment 2022 v.815 pp. 152885
ISSN:
0048-9697
Subject:
copper; copper hydroxide,   etc   ; Escherichia coli K12; antibiotic resistance; chloramphenicol; environment; fungicides; genes; porins; tetracycline; transporters;     Show all 11 Subjects
Abstract:
... The extensive use of copper-based fungicides in orchards, especially in vineyards, leads to the accumulation of copper, which has caused growing concern. However, data on the acquisition of antibiotic resistance in opportunistic pathogens under copper-based fungicides are scarce. In this study, we investigated the potential development of antibiotic resistance in Escherichia coli K12 under selecti ...
DOI:
10.1016/j.scitotenv.2021.152885

7. Effective and selective electroreduction of aqueous nitrate catalyzed by copper particles on multi-walled carbon nanotubes

Author:
Heba Nassar; Ahed Zyoud; Hamza H.S. Helal; Tae Woo Kim; Hikmat S. Hilal
Source:
Journal of environmental management 2022 v.305 pp. 114420
ISSN:
0301-4797
Subject:
copper; copper nanoparticles,   etc   ; carbon nanotubes; drinking water; electrodes; electrolysis; environmental management; fluorine; nitrates; pH; temperature; tin;     Show all 12 Subjects
Abstract:
... Drinking-water contamination with nitrate ions is inevitable and wide spreading, which demands feasible removal. Water de-nitration by potentiostatic electroreduction is described here. A novel electrocatalyst based on nano-copper particles, supported onto multi-walled carbon nanotubes (MWCNTs), and spray-deposited onto fluorine doped tin oxide-glass substrates, is described. The Cu/MWCNT/FTO elec ...
DOI:
10.1016/j.jenvman.2021.114420

8. Copper(I)-Catalyzed Direct Oxidative Annulation of 1,3-Dicarbonyl Compounds with Maleimides: Access to Polysubstituted Dihydrofuran Derivatives

Author:
Wen-Kang Wang; Hong-Ru Tan; Ning-Ning Wang; Hong-Li Ruan; Sheng-Yin Zhao
Source:
Journal of organic chemistry 2022 v.87 no.5 pp. 2711-2720
ISSN:
1520-6904
Subject:
copper,   etc   ; organic chemistry; oxidation; pyrroles;     Show all 4 Subjects
Abstract:
... An efficient annulation method for the synthesis of polysubstituted dihydrofurans from 1,3-dicarbonyl compounds and maleimides is described. The reactions can afford furo[2,3-c]pyrrole derivatives with satisfactory yields. The developed strategy realizes the direct oxidative double C(sp³)–H functionalization in the presence of copper(I) salts and 2-(tert-butylperoxy)-2-methylpropane. Meanwhile, th ...
DOI:
10.1021/acs.joc.1c02648

9. Enhancement on the degradation of naproxen in Cu0 activated peroxymonosulfate system by complexing reagents

Author:
Huizhong Chi; Wenbiao Jin; Jianqiao Zhang; Yibin Xiu; Tao Xu
Source:
Journal of hazardous materials 2022 pp. 129416
ISSN:
0304-3894
Subject:
copper,   etc   ; electron transfer; oxidants; pH;     Show all 4 Subjects
Abstract:
... In recent years, there has been growing interest in the mechanism (radical or nonradical) of persulfate activation processes. In this study, the enhancement of naproxen (NPX) degradation in a Cu⁰/peroxymonosulfate (PMS) system by complexing reagents was investigated. Surprisingly, neocuproine (NCP) alters the nature of reactive species in the Cu⁰/PMS system. A high-valent copper species, Cu(III)-N ...
DOI:
10.1016/j.jhazmat.2022.129416

10. MOFs-derived hollow Copper-based sulfides for optimized electromagnetic behaviors

Author:
Wenbo Li; Jun Chen; Peng Gao
Source:
Journal of colloid and interface science 2022 v.606 pp. 719-727
ISSN:
0021-9797
Subject:
copper,   etc   ; absorption; electromagnetic radiation; nanocomposites;     Show all 4 Subjects
Abstract:
... The preparation of hollow materials is one of the most feasible ways to obtain efficient electromagnetic wave (EMW) absorbers. Herein, using the copper-based metal–organic frameworks (Cu-MOF-74) as templates, hollow copper-based sulfides with various morphologies (rod-like, cubic, and dodecahedral) were designed and synthesized. The outer Cu₂S and/or Cu₃₁S₁₆ shell possesses excellent electronic co ...
DOI:
10.1016/j.jcis.2021.08.019

11. Microstructure and oxidation behavior of CoCrxCuFeMnNi high-entropy alloys fabricated by vacuum hot-pressing sintering

Author:
Bo Ren; Rui-feng Zhao; Ai-yun Jiang; Yuan Yu
Source:
Micron 2022 v.158 pp. 103291
ISSN:
0968-4328
Subject:
copper,   etc   ; alloys; microstructure; oxidation; oxygen;     Show all 5 Subjects
Abstract:
... Herein, CoCrₓCuFeMnNi (x = 0, 0.5, 1.0, 1.5, and 2.0, in molar ratio) high-entropy alloys (HEAs) are fabricated by vacuum hot-pressing sintering (VHPS). The effect of Cr content on the microstructure and oxidation behavior are studied. When x ≤ 1.5 mol, the phases of the four alloys were all composed of FCC2 major phase and FCC1 secondary phase, while Cr₂.₀ alloy consisted of a small amount of FCC ...
DOI:
10.1016/j.micron.2022.103291

12. Validation of Density Functional Theory Methods for Predicting the Optical Properties of Cu-Based Multinary Chalcogenide Semiconductors

Author:
Qi Wang; Honglin Ma; Bilian Ni; Yi Li; Shuping Huang; Wei Lin; Yongfan Zhang
Source:
Journal of physical chemistry 2022 v.126 no.9 pp. 4684-4697
ISSN:
1932-7455
Subject:
copper,   etc   ; absorption; density functional theory;     Show all 3 Subjects
Abstract:
... Copper-based chalcogenide semiconductors are particularly attractive materials for photovoltaic and nonlinear optical applications. Unfortunately, accurate theoretical understanding of the optical responses of these materials is hindered by the presence of strongly localized Cu 3d electrons. To assess the validity of calculation schemes for determining the optical properties of Cu-based chalcogeni ...
DOI:
10.1021/acs.jpcc.1c10510

13. Al³⁺ Dopants Induced Mg²⁺ Vacancies Stabilizing Single-Atom Cu Catalyst for Efficient Free-Radical Hydrophosphinylation of Alkenes

Author:
Qi Xu; Chenxi Guo; Beibei Li; Zedong Zhang; Yajun Qiu; Shubo Tian; Lirong Zheng; Lin Gu; Wensheng Yan; Dingsheng Wang; Jian Zhang
Source:
Journal of the American Chemical Society 2022 v.144 no.10 pp. 4321-4326
ISSN:
1520-5126
Subject:
copper nanoparticles,   etc   ; alkenes; catalysts; durability; nanosheets;     Show all 5 Subjects
Abstract:
... Utilizing heterogeneous catalysts to overcome obstacles for homogeneous reactions is fascinating but very challenging owing to the difficult fabrication of such catalysts based on the character of target reactions. Herein, we report a Al³⁺ doping strategy to construct single-atom Cu on MgO nanosheets (Cu₁/MgO(Al)) for boosting the free-radical hydrophosphinylation of alkenes. Al³⁺ dopants in MgO b ...
DOI:
10.1021/jacs.2c01456

14. Copper-Catalyzed [4 + 1] Annulation of Enaminothiones with Indoline-Based Diazo Compounds

Author:
Zilong Huang; Yuan He; Liandi Wang; Jiying Li; Bao-Hua Xu; Yong-Gui Zhou; Zhengkun Yu
Source:
Journal of organic chemistry 2022 v.87 no.6 pp. 4424-4437
ISSN:
1520-6904
Subject:
copper,   etc   ; carbenes; diazo compounds; organic chemistry;     Show all 4 Subjects
Abstract:
... A concise synthetic route to spiroindoline-fused S-heterocycles was developed through copper-catalyzed [4 + 1] annulation using enaminothiones as donor–acceptor synthons. Both 3-diazoindolin-2-imines and 3-diazooxindoles were amenable to work as effective C1 building blocks. The reaction proceeds via a copper-catalyzed cascade process involving the in situ generation of copper(I) carbene and C–S/C ...
DOI:
10.1021/acs.joc.2c00137

15. Green synthesis of copper nanoparticles using Sesbania aculeata to enhance the plant growth and antimicrobial activities

Author:
V. Tamil Elakkiya; R. V. Meenakshi; P. Senthil Kumar; V. Karthik; K. Ravi Shankar; P. Sureshkumar; A. Hanan
Source:
International journal of environmental science and technology 2022 v.19 no.3 pp. 1313-1322
ISSN:
1735-1472
Subject:
copper; copper metabolism; copper nanoparticles,   etc   ; Brassica nigra; Curvularia lunata; Remotididymella destructiva; Sesbania bispinosa; anti-infective agents; antimicrobial properties; biofertilizers; citrates; copper sulfate; cupric oxide; environmental science; germination; leaf extracts; nicotinamide; phloem; phytochelatins; plant growth; plant protection; potassium; sap; tissue culture; toxicity; transmission electron microscopy; xylem;     Show all 27 Subjects
Abstract:
... Green synthesis of copper oxide nanoparticles (CuONPs) was performed using Sesbania aculeata leaf extract. The characteristics of CuONPs were studied using the selected area electron diffraction analysis. The effect of nanoparticles on the plant growth including germination efficiency was studied in Brassica nigra at different concentrations (25, 30, 100 mg/100 ml) using plant tissue culture techn ...
DOI:
10.1007/s13762-021-03182-9

16. Uranium and Thorium water decontamination via novel coated Cu-based nanoparticles; the role of chemistry and environmental implications

Author:
Fotini Noli; Argyro Dafnomili; Georgios Sarafidis; Catherine Dendrinou-Samara; Nikolaos Pliatsikas; Maria Kapnisti
Source:
Science of the total environment 2022 v.838 pp. 156050
ISSN:
0048-9697
Subject:
copper; copper nanoparticles,   etc   ; X-ray photoelectron spectroscopy; decontamination; environment; equations; nitrates; pH; sorbents; temperature; thermodynamics; thorium; uranium; water treatment;     Show all 14 Subjects
Abstract:
... The removal of radioactive contaminants from aquifers is a matter of great concern. In this paper, coated copper-based nanoparticles (Cu-based NPs) were investigated as sorbent materials to remove uranium and thorium from low-level wastes, and especially from water, considering the influences of temperature, time, concentration, and pH. Cu-based NPs were derived through a hydrothermal synthesis fr ...
DOI:
10.1016/j.scitotenv.2022.156050

17. Inhalation toxicity of copper compounds: Results of 14-day range finding study for copper sulphate pentahydrate and dicopper oxide and 28-day subacute inhalation exposure of dicopper oxide in rats

Author:
Craig A. Poland; Sue A. Hubbard; Len Levy; Carol Mackie
Source:
Toxicology 2022 v.474 pp. 153221
ISSN:
0300-483X
Subject:
copper; copper sulfate,   etc   ; biomarkers; epithelium; fibrosis; histiocytosis; histology; hyperplasia; inflammation; inhalation exposure; inhalation toxicity; lungs; macrophages; neutrophils; pH; satellites; toxicology;     Show all 17 Subjects
Abstract:
... Inhalation exposure to copper may occur during a range of occupational activities and the purpose of this study was to characterise the toxicological response to repeated inhalation of two copper compounds, representative of copper substances in large-scale production/use. Crl:CD(SD) rats were repeatedly exposed to aerosols of dicopper oxide (Cu₂O) or copper sulphate pentahydrate (CuSO₄.5 H₂O) for ...
DOI:
10.1016/j.tox.2022.153221

18. A comparative study of oxide-derived Cu electrocatalysts through electrochemical vs. thermal reduction

Author:
Fang Ye; Qingye Ren; Lifeng Zhang; Langli Luo
Source:
Chemical communications 2022 v.58 no.41 pp. 6120-6123
ISSN:
1364-548X
Subject:
copper nanoparticles,   etc   ; carbon dioxide; comparative study; electrochemistry;     Show all 4 Subjects
Abstract:
... Herein, we demonstrated how the processing routes of OD-Cu affected the surface structure and electrochemical reduction of CO₂. We found that the OD-Cu obtained by H₂ annealing is large Cu nanoparticles (>100 nm) while the OD-Cu processed by electrochemical reduction possesses a porous structure of aggregated small Cu + Cu₂O nanoparticles (∼5 nm). These structural differences lead to a distinct pe ...
DOI:
10.1039/d2cc01534j

19. Comment on “High-Resolution Microscopical Studies of Contact Killing Mechanisms on Copper-Based Surfaces”

Author:
Edward Sacher
Source:
ACS applied materials & interfaces 2022 v.14 no.15 pp. 16959-16960
ISSN:
1944-8252
Subject:
copper,   etc   ; Bacillus subtilis; Gram-positive bacteria; peptidoglycans;     Show all 4 Subjects
Abstract:
... In the original paper, Chang and co-workers describe the contact killing of Bacillus subtilis, a Gram-positive bacterium, on copper-containing substrates and offer a mechanism for its accomplishment. The present Comment offers support for that mechanism and adds a necessary initial step, the degradation of the overlying peptidoglycan lattice. Degradation is necessary because the lattice is too thi ...
DOI:
10.1021/acsami.2c03324

20. Conformationally Fixed Chiral Bisphosphine Ligands by Steric Modulators on the Ligand Backbone: Selective Synthesis of Strained 1,2-Disubstituted Chiral cis-Cyclopropanes

Author:
Hiroaki Iwamoto; Yu Ozawa; Yuta Hayashi; Tsuneo Imamoto; Hajime Ito
Source:
Journal of the American Chemical Society 2022 v.144 no.23 pp. 10483-10494
ISSN:
1520-5126
Subject:
copper,   etc   ; Lewis acids; cyclization reactions; ligands; phosphine;     Show all 5 Subjects
Abstract:
... A new series of C₁-symmetric P-chirogenic bisphosphine ligands of the type (R)-5,8-Si-Quinox-tBu₃ (Silyl = SiMe₃, SiEt₃, SiMe₂Ph) have been developed. The bulky silyl modulators attached to the ligand backbone fix the phosphine substituents to form rigid chiral environments that can be used for substrate recognition. The ligand showed high performances for a copper(I)-catalyzed asymmetric borylati ...
DOI:
10.1021/jacs.2c02745