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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Half-Sandwich Iridium Complexes with Hydrazone Ligands: Synthesis and Catalytic Activity in N-Alkylation of Anilines or Nitroarenes with Alcohols via Hydrogen Autotransfer

Inorganic Chemistry, Год журнала: 2022, Номер 61(27), С. 10310 - 10320

Опубликована: Июнь 29, 2022

Here, we synthesize a series of hydrazone-based N,O-chelate half-sandwich iridium complexes through facile route. All air-stable show high catalytic activity in N-alkylation broad scope aniline derivatives and alcohols with liberating water as the sole byproduct. This reaction provides smooth route to diverse monoalkylated amines good excellent yields at moderate temperature low catalyst loading. Moreover, challenging process using nitroarene substrates coupling partners is also carried out this system. The mechanistic study shows that present catalysis proceeds hydrogen borrowing mechanism. iridium(III) 1-4 are characterized by infrared (IR) spectroscopy, nuclear magnetic resonance (NMR) elemental analysis.

Язык: Английский

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Biogenic synthesis of δ‐MnO₂ nanoparticles: A sustainable approach for C‐alkylation and quinoline synthesis via acceptorless dehydrogenation and borrowing hydrogen reactions

Applied Organometallic Chemistry, Год журнала: 2023, Номер 37(7)

Опубликована: Апрель 26, 2023

The sustainable and environmentally benign biogenic synthesis of manganese‐oxide nanoparticles (MnO 2 NPs) in a single crystalline δ ‐phase its subsequent synthetic utility have been described. synthesized ‐MnO NPs were characterized using scanning electron microscopy (SEM), energy dispersive X‐ray (EDX), diffraction (XRD) analysis techniques. detailed envisages the reduction Mn(VII) to Mn(IV) was facilitated by various phytochemicals present aq. mango leaves extract, avoiding use external ligand source. perceived delta ( ) monoclinic phase, wherein spherical agglomerated morphology displayed with particle size <5 nm. Further, newly developed showcased for alpha‐keto‐alkylation quinoline via hydrogen autotransfer acceptorless dehydrogenative coupling strategy. Moreover, series control experiments, mechanistic elucidation, catalyst recyclability, dye removal study demonstrated.

Язык: Английский

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Robust and Elastic Thermoresponsive Hydrogels with High Swelling Properties for Efficient Solar Water Purification

ACS Applied Polymer Materials, Год журнала: 2024, Номер 6(6), С. 3253 - 3262

Опубликована: Март 12, 2024

A viable and long-term method for producing clean water at hydrogel interfaces is solar-driven evaporation. This research utilizes the microgel polymerization technique to fabricate DCS-PNIPAm gels that exhibit exceptional swelling capacity mechanical qualities. Electrostatic forces hydrogen bonds between molecules occur sulfonic acid anions ammonium cations inside P(NIPAm-co-DMAPS) chains. Alginate characterized by a high content of carboxyl hydroxyl groups, which facilitate establishment bonding electrostatic interactions within system. Semi-interpenetrating networks are formed in as result physical chemical cross-linking brought on these interactions. Consequently, hydrogel's characteristics were significantly enhanced, water-collecting rate reached up 9.32 kg m–2 h–1 under one sun irradiation. Notably, sodium alginate (SA) carbon nanotubes (CNTs) layer gel has excellent filtration properties, can make it possible use sunlight purify from various contaminated sources containing dyes, oils, metals.

Язык: Английский

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Multi-hydroxyl POSS supported iridium complexes as a recyclable catalyst for selective synthesis of N-/C-substituted indoles and the total synthesis of HIV-1 fusion inhibitor

Journal of Catalysis, Год журнала: 2023, Номер 429, С. 115205 - 115205

Опубликована: Ноя. 24, 2023

Язык: Английский

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Cyclometalated Half‐Sandwich Ruthenium(II) Complexes: Synthesis, Structure, and Catalytic Activity in Imine Synthesis

Applied Organometallic Chemistry, Год журнала: 2025, Номер 39(2)

Опубликована: Янв. 23, 2025

ABSTRACT Four kinds of cyclometalated half‐sandwich ruthenium(II) complexes 1 – 4 with air stability were synthesized, which supported by C,N‐donor Schiff base ligands as raw materials C‐H activation. These newly synthesized characterized and studied infrared (IR), ultraviolet (UV), nuclear magnetic resonance (NMR), other analytical or spectroscopic techniques, their exact structures confirmed single‐crystal X‐ray analysis. Cyclometalated exhibited good catalytic activity in catalyzing the oxidative homo‐coupling primary amines, dehydrogenation secondary cross‐coupling reaction amines alcohols to synthesize imines, all conducted an open flask oxidant. There was little effect different substituents on ruthenium efficiency. Ruthenium catalysts had characteristics mild conditions, strong universality substrate, stability, high efficiency, potential application industrial production.

Язык: Английский

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Unique Coordination Structure of Mo Species on MSilicalite-1 Robustly Boosting the Reaction Activity of Oxidative Dehydrogenative Coupling of Alcohols with Aromatic Diamines

Industrial & Engineering Chemistry Research, Год журнала: 2025, Номер unknown

Опубликована: Март 26, 2025

Язык: Английский

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Construction of effective and recyclable non-precious metal coordination polymers and their multiple applications in water

Chinese Chemical Letters, Год журнала: 2025, Номер unknown, С. 111165 - 111165

Опубликована: Апрель 1, 2025

Язык: Английский

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Iron-nickel alloy particles with N-doped carbon “armor” as a highly selective and long-lasting catalyst for the synthesis of N-benzylaniline molecules

Nano Research, Год журнала: 2023, Номер 17(4), С. 2308 - 2319

Опубликована: Сен. 8, 2023

Язык: Английский

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Ruthenium-catalyzed β-alkylation of secondary alcohols with primary alcohols: Protic N-heterocyclic carbene's promotional influence

Journal of Molecular Structure, Год журнала: 2024, Номер 1305, С. 137815 - 137815

Опубликована: Фев. 17, 2024

Язык: Английский

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