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1. Regulation of defects and nitrogen species on carbon nanotube by plasma-etching for peroxymonosulfate activation: Inducing non-radical/radical oxidation of organic contaminants

Author:
Shiqi Liu; Siyuan Yin; Zichen Zhang; Li Feng; Yongze Liu; Liqiu Zhang
Source:
Journal of hazardous materials 2023 v.441 pp. 129905
ISSN:
0304-3894
Subject:
phenol,   etc   ; carbon nanotubes; nitrogen; oxidation; species identification;     Show all 5 Subjects
Abstract:
... The structural defects and heteroatom dopants of carbonaceous materials play critical roles in their activation of peroxymonosulfate (PMS) for organic pollutants’ removal. This study uses plasma-etching technology to control the levels of structural defects and nitrogen species in nitrogen-doped carbon nanotubes (N-CNTs) for excellent PMS activation. The vacancy defects, CO, pyrrolic N and graphit ...
DOI:
10.1016/j.jhazmat.2022.129905

2. Ni(NH3)62+ more efficient than Ni(H2O)62+ and Ni(OH)2 for catalyzing water and phenol oxidation on illuminated Bi2MoO6 with visible light

Author:
Yaru Wang; Yechen Wang; Xubo Huang; Min Chen; Yiming Xu
Source:
Journal of environmental sciences (China) 2023 v.126 pp. 556-564
ISSN:
1001-0742
Subject:
phenol,   etc   ; electrodes; ligands; light; liquid-solid interface; nickel; oxidation; perchlorates; photocatalysis; China;     Show all 10 Subjects
Abstract:
... Nickel (hydr)oxide (NiOH) is known to be good co-catalyst for the photoelectrochemical oxidation of water, and for the photocatalytic oxidation of organics on different semiconductors. Herein we report a greatly improved activity of Bi₂MoO₆ (BMO) by nickel hexammine perchlorate (NiNH). Under visible light, phenol oxidation on BMO was slow. After NiNH, NiOH, and Ni²⁺ loading, a maximum rate of phen ...
DOI:
10.1016/j.jes.2022.05.021

3. FeMo@porous carbon derived from MIL-53(Fe)@MoO3 as excellent heterogeneous electro-Fenton catalyst: Co-catalysis of Mo

Author:
Xuedong Du; Wenyang Fu; Pei Su; Qizhan Zhang; Minghua Zhou
Source:
Journal of environmental sciences (China) 2023 v.127 pp. 652-666
ISSN:
1001-0742
Subject:
phenol,   etc   ; 2,4-D; carbon; catalysts; catalytic activity; electric energy consumption; electron paramagnetic resonance spectroscopy; hydroxyl radicals; mineralization; oxidation; reaction kinetics; sulfamethazine; China;     Show all 13 Subjects
Abstract:
... An ultra-efficient electro-Fenton catalyst with porous carbon coated Fe-Mo metal (FeMo@PC), was prepared by calcining MIL-53(Fe)@MoO₃. This FeMo@PC-2 exhibited impressive catalytic performance for sulfamethazine (SMT) degradation with a high turnover frequency value (7.89 L/(g·min)), much better than most of reported catalysts. The mineralization current efficiency and electric energy consumption ...
DOI:
10.1016/j.jes.2022.06.031

4. Preparation and characterization of a novel blue-TiO2/PbO2-carbon nanotube electrode and its application for degradation of phenol

Author:
Yangchun Xu; Ruizhi Feng; Minglu Zhang; Caigan Yan; Junyu Liu; Tingting Zhang; Xiaohui Wang
Source:
Journal of environmental sciences (China) 2023 v.126 pp. 590-601
ISSN:
1001-0742
Subject:
phenol,   etc   ; X-ray diffraction; X-ray photoelectron spectroscopy; chemical oxygen demand; crystal structure; electrochemistry; electrodes; energy; mass spectrometry; nanotubes; oxidation; pH; surface area; wastewater treatment; China;     Show all 15 Subjects
Abstract:
... In this study, we fabricated a blue-TiO₂/PbO₂-carbon nanotube (CNT) electrode in which blue TiO₂ nanotube arrays (blue-TNA) served as the substrate for PbO₂-CNT eletrodeposition. Scanning electron microscope (SEM) showed compact surface structure of the electrode. The β-PbO₂ crystal structure was detected by X-ray diffraction (XRD). The distribution of Pb, O, C, and Na elements on the electrode su ...
DOI:
10.1016/j.jes.2022.04.027

5. The in-depth revelation of the mechanism by which a downflow Leersia hexandra Swartz constructed wetland-microbial fuel cell synchronously removes Cr(VI) and p-chlorophenol and generates electricity

Author:
Yian Wang; Xuehong Zhang; Ling Xiao; Hua Lin
Source:
Environmental research 2023 v.216 pp. 114451
ISSN:
0013-9351
Subject:
phenol,   etc   ; 4-chlorophenol; Acinetobacter; Leersia hexandra; Rhizobium; Spirochaeta; anodes; benzoic acid; carbon dioxide; cathodes; electricity; electricity generation; fuel cells; gas chromatography-mass spectrometry; microbial communities; pollution; pollution control; research; synergism; toxicity; wastewater;     Show all 21 Subjects
Abstract:
... The composite pollution by Cr(VI) and p-chlorophenol (4-CP) has high toxicity and harms water safety. However, research on the effective removal of Cr(VI) and 4-CP composite-polluted wastewater (C&P) and efficient synchronous electricity generation with reclaimed resources is limited. In this study, a downflow Leersia hexandra constructed wetland-microbial fuel cell (DLCW-MFC) was builded to treat ...
DOI:
10.1016/j.envres.2022.114451

6. Activation of persulfate via Mn doped Mg/Al layered double hydroxide for effective degradation of organics: Insights from chemical and structural variability of catalyst

Author:
Jicheng Rui; Ning Deng; Yiying Zhao; Chen Tao; Jizhi Zhou; Zhenzhen Zhao; Xin Huang
Source:
Chemosphere 2022 v.302 pp. 134849
ISSN:
0045-6535
Subject:
phenol,   etc   ; catalysts; oxidation;     Show all 3 Subjects
Abstract:
... Considerable interest has been focusing on the activation of peroxydisulfate (PDS) by layered double hydroxide (LDH) for degradation of organic pollutants. However, understanding the structure and chemistry of LDH by which the activation of PDS could achieve a high degradation efficiency of organic compounds is an unsolved and fundamental question in advanced oxidation processes (AOPs), and one wh ...
DOI:
10.1016/j.chemosphere.2022.134849

7. Direct synthesis of trifluoroethylated benzofurans from silver-catalyzed annulation of trifluoromethyl propynols with phenols

Author:
Bo-Lun Hu; Chao-Fei Wu; Xing-Guo Zhang; Jimin Kim
Source:
Tetrahedron 2022 v.121 pp. 132929
ISSN:
0040-4020
Subject:
phenol,   etc   ; benzofurans; methodology;     Show all 3 Subjects
Abstract:
... An efficient method for the synthesis of trifluoroethylated benzofurans from trifluoromethyl propynols with general phenols was developed. In the presence of AgNTf₂, a variety of trifluoromethyl propynols underwent cascade Friedel-Crafts propargylation/Michael-type addition/1,3-H shift reactions with various phenols successfully to afford the corresponding trifluoroethylated benzofuran in moderate ...
DOI:
10.1016/j.tet.2022.132929

8. Efficient thiocyanation of aromatic compounds using NH4SCN, DMSO and H2SO4 [Erratum: 2022 ; p.154017]

Author:
Mohammad Abbasi; Najmeh Nowrouzi; Hamed Sedaghat
Source:
Tetrahedron letters 2022 v.101 no. pp. 153929
ISSN:
0040-4039
Subject:
phenol,   etc   ; aniline; indoles;     Show all 3 Subjects
Abstract:
... A simple, efficient, and smooth thiocyanation of indoles, phenols and aniline derivatives using NH₄SCN, DMSO and H₂SO₄ in DMF is introduced. Using this procedure, diverse indoles and N-alkyl indoles are selectively thiocyanated at the C-3 position. para-free anilines, N-alkyl anilines and phenols undergo thiocyanation at the para position selectively. ...
DOI:
10.1016/j.tetlet.2022.153929

9. Photooxidation of the Phenolate Anion is Accelerated at the Water/Air Interface

Author:
Caleb J. C. Jordan; Eleanor A. Lowe; Jan R. R. Verlet
Source:
Journal of the American Chemical Society 2022 v.144 no.31 pp. 14012-14015
ISSN:
1520-5126
Subject:
phenol,   etc   ; absorption; air; photooxidation;     Show all 4 Subjects
Abstract:
... Molecular photodynamics can be dramatically affected at the water/air interface. Probing such dynamics is challenging, with product formation often probed indirectly through its interaction with interfacial water molecules using time-resolved and phase-sensitive vibrational sum-frequency generation (SFG). Here, the photoproduct formation of the phenolate anion at the water/air interface is probed ...
DOI:
10.1021/jacs.2c04935

10. Metal-Free Boron-Mediated ortho-C–H Hydroxylation of N-Benzyl-3,4,5-tribromopyrazoles

Author:
Gaorong Wu; Zhaoziyuan Yang; Xiaobo Xu; Liqiang Hao; Lu Chen; Yangyang Wang; Yafei Ji
Source:
Organic letters 2022 v.24 no.19 pp. 3570-3575
ISSN:
1523-7052
Subject:
phenol,   etc   ; hydroxylation; methodology; oxidation;     Show all 4 Subjects
Abstract:
... A novel route has been reported for C–H hydroxylation of benzyl compounds directed by a 3,4,5-tribromopyrazole auxiliary via boronation/oxidation using BBr₃ and NaBO₃·4H₂O. The strategy exhibits outstanding site selectivity and affords the corresponding phenols in moderate to excellent yields under metal-free conditions. Besides, this protocol can be achieved in one pot, which is highly promising ...
DOI:
10.1021/acs.orglett.2c01347

11. New generation advanced nanomaterials for photocatalytic abatement of phenolic compounds

Author:
Gaurav Yadav; Md. Ahmaruzzaman
Source:
Chemosphere 2022 v.304 pp. 135297
ISSN:
0045-6535
Subject:
phenol,   etc   ; nanocatalysts; photocatalysis; photolysis;     Show all 4 Subjects
Abstract:
... Nowadays, organic pollutants create severe problems worldwide. Phenolic compounds are the harmful pollutants that are developed from industrial effluents, thus causing several environmental problems. Low-cost materials show good potential capabilities for removal of phenolic compounds but are not so effective, so modification is required. New generation nanocatalysts are thought to be excellent fo ...
DOI:
10.1016/j.chemosphere.2022.135297

12. The Photochemical Activity of a Halogen-Bonded Complex Enables the Microfluidic Light-Driven Alkylation of Phenols

Author:
Sara Cuadros; Cristian Rosso; Giorgia Barison; Paolo Costa; Marina Kurbasic; Marcella Bonchio; Maurizio Prato; Giacomo Filippini; Luca Dell’Amico
Source:
Organic letters 2022 v.24 no.16 pp. 2961-2966
ISSN:
1523-7052
Subject:
phenol,   etc   ; alkylation; photochemistry; regioselectivity;     Show all 4 Subjects
Abstract:
... A mild light-driven protocol for the direct alkylation of phenols is reported. The process is driven by the photochemical activity of a halogen-bonded complex formed upon complexation of the in situ generated electron-rich phenolate anion with the α-iodosulfone. The reaction proceeds rapidly (10 min) under microfluidic conditions, delivering a wide variety of ortho-alkylated products (27 examples, ...
DOI:
10.1021/acs.orglett.2c00604

13. Visible Light-Induced Highly Regioselective and Stereoselective Oxysulfonylation of Alkynes for the Synthesis of (E)-β-Phenoxy Vinylsulfones

Author:
Wenjiao Xie; Pengju Ma; Yujun Zhang; Longyi Xi; Shengqi Qiu; Xuan Huang; Bo Yang; Yuan Gao; Junmin Zhang
Source:
Organic letters 2022 v.24 no.32 pp. 6099-6104
ISSN:
1523-7052
Subject:
phenol,   etc   ; alkynes; regioselectivity; stereoselectivity;     Show all 4 Subjects
Abstract:
... A highly efficient visible light-induced regioselective and stereoselective oxysulfonylation of alkynes with arylsulfonate phenol esters has been developed. This photocatalyst- and metal-free method proceeds smoothly under very mild conditions and exhibits a broad substrate scope, providing (E)-β-phenoxy vinylsulfones in moderate to excellent yields. Mechanistic studies indicated the involvement o ...
DOI:
10.1021/acs.orglett.2c02512

14. Proton-Coupled Electron-Transfer Reduction of Dioxygen: The Importance of Precursor Complex Formation between Electron Donor and Proton Donor

Author:
Yu-Fan Wang; Ming-Tian Zhang
Source:
Journal of the American Chemical Society 2022 v.144 no.27 pp. 12459-12468
ISSN:
1520-5126
Subject:
phenol,   etc   ; electron transfer; oxidation; tyrosine;     Show all 4 Subjects
Abstract:
... The proton-coupled electron transfer (PCET) reaction has drawn extensive attention for its widespread occurrence in chemistry, biology, and materials science. The mechanistic studies via model systems such as tyrosine and phenol oxidation have gradually deepened the understanding of PCET reactions, which was widely accepted and applied to bond activation and transformation. However, direct PCET ac ...
DOI:
10.1021/jacs.2c04467

15. Intermolecular enantioselective dearomatizing para-methoxylation of phenols using 2-iodoresorcinol/lactamide catalysts

Author:
Karol Kraszewski; Ireneusz Tomczyk; Marcin Kalek
Source:
Tetrahedron letters 2022 v.108 pp. 154127
ISSN:
0040-4039
Subject:
phenol,   etc   ; chemical reactions; enantioselectivity; methanol;     Show all 4 Subjects
Abstract:
... Intermolecular enantioselective oxidative para-dearomatization of phenols with the addition of methanol, catalyzed by a chiral 2-iodoresorcinol/lactamide, has been developed. The reaction allows for the synthesis of a broad range of 4-methoxy-2,5-cyclohexadienone products with up to 62% ee (from 2,4-disubstituted phenols in 43–62% ee; from a 3,4-disubstituted phenol in 17% ee; from 4-substituted-1 ...
DOI:
10.1016/j.tetlet.2022.154127

16. Reprint of: Fluorescence and the Structure of Proteins. I. Effects of Substituents on the Fluorescence of Indole and Phenol Compounds

Author:
ROBERT W. COWGILL
Source:
Archives of biochemistry and biophysics 2022 v.726 pp. 109234
ISSN:
0003-9861
Subject:
phenol,   etc   ; biophysics; fluorescence; indoles; peptides;     Show all 5 Subjects
Abstract:
... The quantum efficiency of fluorescence was measured for simple derivatives of indole and phenol and for tryptophyl and tyrosyl residues in peptides and proteins. Fluorescence of these compounds decreased as the electronegativity of substituents increased. In proteins, one strongly electronegative structure is the peptide bond. It is proposed that the observed, low fluorescence of tryptophyl and ty ...
DOI:
10.1016/j.abb.2022.109234

17. Supramolecular photocatalyst of perylene bisimide decorated with α-Fe2O3: Efficient photo-Fenton degradation of organic pollutants

Author:
Jinrong Lu; Mengting Yue; Wenquan Cui; Cuihong Sun; Li Liu
Source:
Colloids and surfaces 2022 v.655 pp. 130222
ISSN:
0927-7757
Subject:
phenol,   etc   ; industrial wastewater; nitrates; photocatalysts;     Show all 4 Subjects
Abstract:
... The composite of α-Fe₂O₃/PTCDI based on supramolecular photocatalyst of perylene bisimide (PTCDI) decorated with α-Fe₂O₃ was prepared via calcination of ferric nitrate with self-assembly PTCDI. The composite displayed an enhanced performance for the degradation of phenol pollutants and coking wastewater via photo-Fenton reaction relative to the single component, which owing to efficient charge tra ...
DOI:
10.1016/j.colsurfa.2022.130222

18. Synthesis of Aryl Perfluorocyclopropyl Ethers via [2 + 1] Cyclopropanation Using TMSCF₂Br Reagent

Author:
Ran Liu; Jinbo Hu
Source:
Organic letters 2022 v.24 no.20 pp. 3589-3593
ISSN:
1523-7052
Subject:
phenol,   etc   ; cycloaddition reactions; ethers; toluene;     Show all 4 Subjects
Abstract:
... Aryl perfluorocyclopropyl ethers have been synthesized for the first time by [2 + 1] cyclopropanation between aryl trifluorovinyl ethers and a commercially available TMSCF₂Br reagent. This cycloaddition reaction between two fluorine-containing reactants proceeds smoothly in toluene at 120 °C in the presence of a catalytic amount of n-Bu₄NBr, and the reaction tolerates a variety of functional group ...
DOI:
10.1021/acs.orglett.2c00958

19. Diphenoxytriphenylphosphorane: A potent carbohydrate cyclodehydration reagent

Author:
Peter Sunde-Brown; Ian D. Jenkins; Helen Blanchard; Todd A. Houston
Source:
Tetrahedron 2022 v.120 pp. 132877
ISSN:
0040-4020
Subject:
phenol,   etc   ; carbohydrates; ethylene oxide; glycols; regioselectivity;     Show all 5 Subjects
Abstract:
... Methyl α(and β)-D-3,4-anhydro-tagatofuranosides are important synthetic building blocks as they undergo regioselective ring-opening to afford exclusively products with the D-fructo configuration. Previous attempts to prepare these compounds from the corresponding methyl D-fructofuranosides under standard Mitsunobu conditions have led to an undesired 9:1 mixture of tagato and psico oxiranes. We now ...
DOI:
10.1016/j.tet.2022.132877

20. Ligand- and Counterion-Assisted Phenol O-Arylation with TMP-Iodonium(III) Acetates

Author:
Kotaro Kikushima; Naoki Miyamoto; Kazuma Watanabe; Daichi Koseki; Yasuyuki Kita; Toshifumi Dohi
Source:
Organic letters 2022 v.24 no.10 pp. 1924-1928
ISSN:
1523-7052
Subject:
phenol,   etc   ; Lewis acids; acetates; ligands; oxygen;     Show all 5 Subjects
Abstract:
... High reactivity of trimethoxyphenyl (TMP)-iodonium(III) acetate for phenol O-arylation was achieved. It was first determined that the TMP ligand and acetate anion cooperatively enhance the electrophilic reactivity toward phenol oxygen atoms. The proposed method provides access to various diaryl ethers in significantly higher yields than the previously reported techniques. Various functional groups ...
DOI:
10.1021/acs.orglett.2c00294