Advancements in Pd-Based Supported Porous Nanocatalysts for the C-C Cross-Coupling Reactions DOI Open Access
Debabrata Chakraborty, Asim Bhaumik

Catalysts, Journal Year: 2024, Volume and Issue: 15(1), P. 16 - 16

Published: Dec. 28, 2024

Palladium (Pd) is a 4d transition metal with electronic configuration [Kr] 4d10 5s0, and it one of the most widely studied metals in periodic table due to its versatile catalytic role organic synthesis. The choice ligands that can coordinate Pd sites plays crucial progress reaction. Due coexistence multiple oxidation states (Pd(0)/Pd(II)), active catalysts participate various stages coupling Pd-catalyzed C-C reactions proceed through four steps: (1) oxidative addition reactant site, (2) transmetallation, (3) rearrangements ligand centers (4) reductive elimination products. For heterogeneous nanocatalysts, are often strongly bound (chelated) solid catalyst surfaces. In this review, we have highlighted advancements made nanocatalysts an emphasis on types different classes porous solids, which could ligate via strong covalent bonds. high specific surface areas small these provide larger number thus facilitate Mechanistic aspects cross-coupling discussed context structure–reactivity relationship.

Language: Английский

Pd Nanocatalysts Supported on Hollow Carbon Spheres for Heck Reaction: Void-Confinement Effect with Varying Space Size in Liquid-Phase Processes DOI

Maofei Ran,

Yangshen Ma,

Jianli yang

et al.

Published: Jan. 1, 2024

In this study, a nanoreactor-type catalyst was employed in the Heck reaction, with Pd NPs embedded into shells of mesoporous hollow carbon spheres. Our findings highlight critical role both cavity and shell achieving high activity stability simultaneously. Additionally, by adjusting size nanoreactor, void-confinement effect diminishes as available space increases. This study focuses on designing an intelligent Pd-based enhanced catalytic toward reactions good recyclability using "in & out" strategy. approach has potential to provide microenvironmental engineering strategies for nanostructures.

Language: Английский

Citations

0
Pd Nanocatalysts supported on hollow carbon spheres for heck reaction: Void-confinement effect with varying space size in liquid-phase processes DOI Creative Commons

Yangsheng Ma,

Jianli Yang,

Jiayi Li

et al.

Applied Catalysis O Open, Journal Year: 2024, Volume and Issue: 191, P. 206928 - 206928

Published: April 12, 2024

In this study, a nanoreactor-type catalyst was employed in the Heck reaction, with Pd NPs embedded into shells of mesoporous hollow carbon spheres. Our findings highlight critical role both cavity and shell achieving high activity stability simultaneously. Additionally, by adjusting size nanoreactor, void-confinement effect diminishes as available space increases. This study focuses on designing an intelligent Pd-based enhanced catalytic toward reactions good recyclability using "in & out" strategy. approach has potential to provide microenvironmental engineering strategies for nanostructures.

Language: Английский

Citations

0
A silica gel-supported schiff base palladium nanocatalyst for sonogashira cross-coupling and synthesis of an anti-cancer chemotherapeutic agent DOI
Shaheen M. Sarkar, Lutfor Rahman, Kamrul Hasan

et al.

Sustainable Chemistry and Pharmacy, Journal Year: 2024, Volume and Issue: 42, P. 101862 - 101862

Published: Nov. 29, 2024

Language: Английский

Citations

0
Gold Nanostructures Stabilized on Layered Polydimethylsiloxane-Like Porous Silica Framework as a Solvent-Free Heterogeneous Catalyst for Hydroamination DOI
Mohamed Boundor, Nadia Katir, Sébastien Royer

et al.

ACS Applied Nano Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 25, 2024

Bifaceted building blocks possessing a layered hydrophobic polydimethylsiloxane (PDMS)-like framework and segment-enriched silica network with permanent porosity have been crafted for hosting stabilizing gold nanoparticles. The as-prepared solid materials were used as heterogeneous catalysts solvent-free hydroamination. Unlike mesostructured-type conventional supports, the more pronounced hydrophobicity of PDMSiO2 provides driving force preventing imine hydrolysis, allowing consequently improving yield to 94% selectivity 99%.

Language: Английский

Citations

0
Metallaphotocatalytic Platforms Based on Covalent Organic Frameworks for Cross‐Coupling Reactions DOI
Tongtong Jia, Yukun Zhao,

Wenjing Song

et al.

ChemCatChem, Journal Year: 2023, Volume and Issue: 16(7)

Published: Dec. 20, 2023

Abstract Cooperation of transition metal catalysis with photocatalysis is an emerging powerful approach to achieve coupling reactions for the synthesis important chemicals. Owing their facilely modulated structures and properties via reticular chemistry, photoactive covalent organic frameworks (COFs) arise quickly in building metallaphotocatalytic platforms targeting more efficient sustainable protocol. In this Minireview, we summarize recent advances COFs‐based (integrated) forge carbon‐carbon/heteroatom (C, B, N, O, P, S, etc.) bonds a variety cross‐coupling driven by light, focuses on engineering COFs’ backbone, as well organization mode COFs site promoted catalytic performance. We also highlight essential role underlying electron/energy processes metallated (M@COFs). Aiming guide catalysts’ design performance or currently challenging transformations, give our perspectives under‐developed yet promising field.

Language: Английский

Citations

1
Manufacturing and the synthesis of (CdTe)x: (S)1-x/PSi by laser-induced plasma technology DOI Creative Commons
Abdulrhman H. Shaker, Kadhim A. Aadim,

Riyam N. Muhsen

et al.

Research Square (Research Square), Journal Year: 2024, Volume and Issue: unknown

Published: Feb. 27, 2024

Abstract In this work, the porous silicon (PS) layers were prepared with electrochemical etching technique of n-type resistance (3.2 µm) in hydrofluoric acid (HF) at a concentration (1 ml )with current density (25 mA/cm 2 ) (20) minute time. The morphological advantages (AFM) and electrical properties J-V studied. atomic force microscopy investigation displays rough surface, process (etching time) structure nucleates which leads to an increase depth average diameter (34.12 nm). Consequently, surface roughness also increases. produce PS; namely density-voltage characteristics, show that Porous has sponge-like pore is increased efficiency Solar cell devices. This behavior was attributed depletion zone width led built-in potential.

Language: Английский

Citations

0
Ultra-Small Palladium Nanoparticles Supported by Cobalt-Containing Mesoporous Carbon: Highly Efficient Magnetic Reusable Catalyst in Green Media DOI
Mohamed Enneiymy,

Ahmed Benharref

Published: Jan. 1, 2024

Download This Paper Open PDF in Browser Add to My Library Share: Permalink Using these links will ensure access this page indefinitely Copy URL DOI

Language: Английский

Citations

0
Highly Ordered Periodic Mesoporous Organosilica Material Containing the Ionic 4,4-Bipyridinium Group and Decorated with Palladium Nanoparticles: A Proposal for Nanoreactor DOI

Cezar A. Didó,

Carlos D.G. Caneppele,

Douglas Santana Charqueiro

et al.

Published: Jan. 1, 2024

A Periodic Mesoporous Organosilica (PMO) containing the cationic 4,4-bipyridinium group, presenting 0.25 mmol g-1 that corresponds to 11.5 w/w%, was successfully prepared. This material designed have ionic group acting as anchoring agent of PdCl42- anion complex, in a much lower amount than available sites (3 and 15 molar%). Subsequently, palladium complex situ reduced obtain stabilized nanoparticles (PdNP). The ensemble characterization results showed PMO walls cylindrical morphology with hexagonal packing, generating well-ordered pores narrow size distribution high surface area, even after being decorated PdNP. is candidate be an efficient nanoreactor considering it contains spatial uniformity its chemical confined environment. Aiming evaluate availability sites, used catalyst reduction p-nitrophenol model reaction. Although present study has comparable activity other already reported systems, presents impressive lowest molar palladium/p-nitrophenol ratio found literature.

Language: Английский

Citations

0
The effect of the DNA support on Pd/DNA catalyzed organic transformations DOI
Mehmet Mart

Catalysis Science & Technology, Journal Year: 2024, Volume and Issue: 14(13), P. 3580 - 3588

Published: Jan. 1, 2024

DNA-supported palladium catalysts (Pd/DNA) have been used in imination, hydrogenation, cross-coupling, and carbonylation reactions. In this mini review, the effectiveness of Pd/DNA impact DNA support on reusability recent years has examined.

Language: Английский

Citations

0
Silica gel-supported Pd nanocatalyst: Efficient Mizoroki-Heck reactions and sustainable Ozagrel synthesis DOI Creative Commons
Shaheen M. Sarkar, Md Lutfor Rahman

Giant, Journal Year: 2024, Volume and Issue: 19, P. 100326 - 100326

Published: July 24, 2024

We developed a cost-effective silica gel-supported palladium nanocatalyst in three-step reactions process. Initially, gel (60–120 mesh) underwent amino group functionalization using 3-aminopropyltriethoxysilane, leading to the formation of Schiff base through reaction with 1,10-phenanthroline-2,9-dicarboxaldehyde ligand. Subsequently, was introduced matrix ligand presence salt and hydrazine hydrate, resulting Schiff-base (Si@SBPdNPs 3). Successful confirmed various spectroscopic techniques. FT-IR spectra demonstrated incorporation organic moieties onto surface, while SEM images revealed modified spherical shape gel. TEM XRD analyses on matrix. ICP EDX measurements validated anchoring 0.55 mmol/g catalyst. Additionally, XPS analysis showed complexation Pd(0) matrix, confirming successful integration into system. This outstanding performance Mizoroki-Heck reactions, yielding high product outputs cross-coupling aryl halides olefins under mild conditions. effectively utilized synthesizing Ozagrel, thromboxane A2 synthesis inhibitor used for treating noncardioembolic stroke patients. Remarkably, catalyst excellent reusability, maintaining productivity across five consecutive cycles, underscoring its economic sustainable potential industrial applications.

Language: Английский

Citations

0