Iridium supported on porous polypyridine-oxadiazole as high-activity and recyclable catalyst for the borrowing hydrogen reaction

Green Chemistry, Год журнала: 2022, Номер 24(6), С. 2602 - 2612

Опубликована: Янв. 1, 2022

Porous polypyridine-oxadiazole supported iridium catalysts (PPO-Ir) revealed high catalytic activity for the reaction of dimethyl-6-aminouracil (including 1,3-dimethylbarbituric acid, 2-aminobenzylamine) with alcohols.

Язык: Английский

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Gadolinium-Doped Carbon Dots with Dual Enzyme Activity for Visual Detection of Cu²⁺ and Antibacterial Applications

ACS Applied Nano Materials, Год журнала: 2024, Номер 7(4), С. 4228 - 4238

Опубликована: Фев. 5, 2024

The preparation and property studies of long-wavelength-emitting carbon dots (CDs) nanozymes with multifunctions like multienzyme activity nanozymes, antibacterial, antioxidation have promising prospects in biochemical detection clinical fields. This paper reports the fast dual enzyme-like active yellow-green quantum (4-ASA/Gd-CDs) through a one-step hydrothermal route rare-earth element Gd doping, 4-aminosalicylic acid (4-ASA), polyethyleneimine (PEI) as raw materials. prepared CDs can produce O2•– under irradiation UV light rapidly oxidize colorless substrate o-phenylenediamine (OPD) into yellow 2,3-diaminophenazine (oxOPD); meanwhile, heavy metal Cu2+ strongly coordinate CDs, leading to electron transfer inhibition CDs-like oxidative enzyme activity, finally realize real-time colorimetric Cu2+. limit was low 0.38 μM (3σ/k) dynamic range from 0 38.4 μM. Moreover, portable hydrogels (CDs-OPD-PSA) were also prepared, visual achieved assistance smartphone. experiment showed that 4-ASA/Gd-CDs exhibited excellent antibacterial ability superoxide dismutase (SOD)-like activity. mechanisms against gram-negative/positive bacteria investigated potential value its own antioxidant MICs G+ Staphylococcus aureus Bacillus subtilis are 30 17 μg/mL, respectively, those G– Escherichia coli Pseudomonas aeruginosa 210 35 respectively. research would provide an theoretical practical basis for synthesis their application

Язык: Английский

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Targeting ctDNA binding and elaborated in-vitro assessments concerning novel Schiff base complexes: Synthesis, characterization, DFT and detailed in-silico confirmation

Journal of Molecular Liquids, Год журнала: 2020, Номер 322, С. 114977 - 114977

Опубликована: Дек. 8, 2020

Язык: Английский

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Metal‐Ion/Metal Nanoparticle‐Anchored Porous Organic Polymers as Efficient Catalysts for Organic Transformations – A Recent Overview

Chemistry - An Asian Journal, Год журнала: 2023, Номер 18(8)

Опубликована: Фев. 23, 2023

Porous organic polymers are porous materials that interlinked with building blocks by strong covalent bonds. The functional groups on the can be carefully chosen to obtain a POP desired functionalities. In certain cases, pores or voids interact molecules via non-covalent interactions and hence they serve as catalytic centers. many pristine POPs themselves were evaluated heterogeneous catalysts for their activity. inner of act ligand metal ions/metal nanoparticles wide range metal-ion-anchored nanoparticle-loaded reported. These catalyze different reactions metal-based catalysis following pathway. this type catalysis, plays an important role, i. e., it serves carbon matrix, interacts interactions, further in metal/metal-ion-anchored POPs, concentration is highly reduced transformation effectively takes place at interface metal/carbon matrix. Herein, we discuss recent developments metal-ion/metal nanoparticle loaded role various transformations such C-C coupling reactions, borrowing hydrogen CO2 transformations, hydroformylations oxidation alkynes 1,2-diketones C-H arylation reactions.

Язык: Английский

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Zn(II)-Catalyzed Multicomponent Sustainable Synthesis of Pyridines in Air

The Journal of Organic Chemistry, Год журнала: 2023, Номер 88(6), С. 3650 - 3665

Опубликована: Фев. 28, 2023

Herein, we report a Zn(II)-catalyzed solvent-free sustainable synthesis of tri- and tetra-substituted pyridines using alcohols as the primary feedstock NH4OAc nitrogen source. Using well-defined air-stable Zn(II)-catalyst, 1a, featuring redox-active tridentate azo-aromatic pincer, 2-((4-chlorophenyl)diazenyl)-1,10-phenanthroline (La), wide variety unsymmetrical 2,4,6-substituted were prepared by three-component coupling secondary with NH4OAc. Catalyst 1a is equally compatible four-component coupling. Unsymmetrical also via alcohol two different A series up to 67% yield 1-phenylpropan-1-one or 1,2-diphenylethan-1-one The 1a-catalyzed reactions proceeded efficiently upon replacing corresponding ketones, producing desired in higher yields shorter reaction time. few control experiments performed unveil mechanistic aspects, which indicates that active participation aryl-azo ligand during catalysis enables Zn(II)-complex act an efficient catalyst for present multicomponent reactions. Aerial oxygen acts oxidant dehydrogenation alcohols, H2O H2O2 byproducts.

Язык: Английский

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Tailoring, structural inspection of novel oxy and non-oxy metal-imine chelates for DNA interaction, pharmaceutical and molecular docking studies

Polyhedron, Год журнала: 2021, Номер 201, С. 115167 - 115167

Опубликована: Март 23, 2021

Язык: Английский

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Selective C-C bonds formation, N-alkylation and benzo[d]imidazoles synthesis by a recyclable zinc composite

Chinese Chemical Letters, Год журнала: 2021, Номер 33(1), С. 266 - 270

Опубликована: Июль 2, 2021

Язык: Английский

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Ligand-tuned cobalt-containing coordination polymers and applications in water

Green Chemistry, Год журнала: 2020, Номер 22(23), С. 8452 - 8461

Опубликована: Янв. 1, 2020

Co-CIA could realize the alkylation of ketones and alcohols, alcohols without extra bases organic solvents, while Co-NCIA was effective for synthesis 1-benzyl-2-aryl-1H-benzo[d]imidazoles from various phenylenediamine benzyl in water.

Язык: Английский

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Commercial Copper‐Catalyzed Aerobic Oxidative Synthesis of Quinazolinones from 2‐Aminobenzamide and Methanol

European Journal of Organic Chemistry, Год журнала: 2020, Номер 2020(18), С. 2730 - 2734

Опубликована: Апрель 8, 2020

The focus of this study was the development a new synthetic method for quinazolinones based on principles Green Chemistry. Quinazolinones were synthesized from 2‐aminobenzamide using methanol as both C1 source and green solvent in presence base Cs 2 CO 3 . Additionally, commercially available, economical copper complex used catalyst reaction. desired products achieved moderate to high yield with up 99 % isolated yield.

Язык: Английский

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Highly Efficient and Recyclable Porous Organic Polymer Supported Iridium Catalysts for Dehydrogenation and Borrowing Hydrogen Reactions in Water

ChemCatChem, Год журнала: 2021, Номер 13(22), С. 4751 - 4758

Опубликована: Сен. 2, 2021

Abstract Benzothiazole‐doped porous organic polymers ( POP‐MBTS ) were synthesized from a copolymerization reaction of 2‐(6‐(4‐vinylphenyl)pyridin‐2‐yl)benzo[ d ]thiazole with divinylbenzene. The corresponding POP‐MBTS‐Ir was obtained and fully characterized using SEM, TEM, EDS, TGA, XPS, N 2 sorption isotherms, which disclosed that this catalyst has high surface area, hierarchical porosity, thermodynamic stability. Importantly, revealed catalytic activity for ten different kinds borrowing hydrogen dehydrogenation reactions in water good recovery performance. Furthermore, mechanistic investigations conducted the synthesis triazine derivatives.

Язык: Английский

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