Strategies to Immobilized Catalysts

Piermatti, Oriana; Abu‐Reziq, Raed; Vaccaro, Luigi

doi:10.1002/9783527817290.ch1

Cited by 10 publications

(12 citation statements)

References 165 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…6,11 Synchronizing with the 'green' chemistry principles for sustainable practices, 12 the induction of heterogeneity through the immobilization of metal precursors is common in heterogeneous catalysis. 13 In this connection, the metal nanoparticles (MNPs), considered as semi-heterogeneous systems, when are viewed under a microscope, have arisen as a subclass of catalysis named 'nanocatalysis' favoring improved catalytic activity and functional flexibility. 14 The MNPs represent a well-defined category of colloidal catalytic systems.…”

Section: Synthesismentioning

confidence: 99%

Pd-Nanoparticles-Catalyzed C(sp2)–H Arylation for the Synthesis of Functionalized Heterocycles: Recent Progress and Prospects

Seth¹,

Sunny²,

Maingle³

et al. 2023

Synthesis

View full text Add to dashboard Cite

Transition-metal nanoparticles-catalyzed C–H activation/functionalization is a prominent topic in contemporary research to functionalize privileged heterocyclic scaffolds which hold a significant space in scientific community with their immense applications in medicinal, natural product, agricultural chemistry, and materials science. Among transition-metal-based nanoparticles, Pd nanoparticle catalysis has emerged as the most attractive tool promoting a wide array of practical synthetic transformations of heterocycles. In the last few years, catalytic application of Pd nanoparticles in C–H functionalization has gained popularity in generating relatively inaccessible bonds with a high degree of selectivity and efficiency via the activation of surface metal atoms at nanoscale level. The quantum size effect of nanoparticles offers a large surface area, typically many easily accessible active sites/unit area. These unique characteristics of nanoparticles are considered primary factors of enhanced catalytic activity compared to bulk materials. The nanoparticles catalysts anchored on solid-supports plus unsupported type (e.g., magnetic nanoparticles) provide easy separation from reaction mixture allowing recyclability multiple times, which contributes notably to sustainable management and cost efficiency of a production process. In the current review, we aim to outline Pd nanoparticles-catalyzed C(sp2)–H arylation synthesizing functionalized heterocycles. The preparation of Pd nanoparticles and mechanistic realizations in the corresponding reactions have been explained briefly.

show abstract

Section: Synthesismentioning

confidence: 99%

Pd-Nanoparticles-Catalyzed C(sp2)–H Arylation for the Synthesis of Functionalized Heterocycles: Recent Progress and Prospects

Seth¹,

Sunny²,

Maingle³

et al. 2023

Synthesis

View full text Add to dashboard Cite

show abstract

“…5,6 Heterogeneous catalysts are often classified by their catalytic support, including silica, polymers, modified nanocarbons, metal− organic frameworks, and covalent−organic frameworks. 7 The polymer-supported catalysts can offer the advantages of convenient recycling, structural tunability, and high catalytic stability. 8,9 However, to date, there have been drawbacks of these polymer catalysts, such as low loading capacity and poor mechanical properties, which have limited their application in large-scale processes.…”

Section: ■ Introductionmentioning

confidence: 99%

“…8,9 However, to date, there have been drawbacks of these polymer catalysts, such as low loading capacity and poor mechanical properties, which have limited their application in large-scale processes. 7,8,10 Nanoporous organic polymers (NOP) have shown great efficiency as catalyst supports in heterogeneous catalysis due to their easy preparation and characterization, high surface area, tunable porosity and functionality, and good physical and chemical stability. 9,11−16 The catalytic metal centers confined in nanoporous cavities of NOPs generally give a high turnover number (TON), high-chemical regioselectivity, high recyclability, and low metal contamination in the products.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Sustainable catalysts are a base requirement for the development of green chemistry. − Heterogeneous catalysts with high catalytic activity, long-term stability, and easy recyclability are of increasing importance to organic chemistry. , Heterogeneous catalysts are often classified by their catalytic support, including silica, polymers, modified nanocarbons, metal–organic frameworks, and covalent–organic frameworks . The polymer-supported catalysts can offer the advantages of convenient recycling, structural tunability, and high catalytic stability. , However, to date, there have been drawbacks of these polymer catalysts, such as low loading capacity and poor mechanical properties, which have limited their application in large-scale processes. ,, …”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Versatile Nanoporous Organic Polymer Catalyst for the Size-Selective Suzuki–Miyaura Coupling Reaction

Guo

Luo

et al. 2022

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

Heterogenous catalysts with confined nanoporous catalytic sites are shown to have high activity and size selectivity. A solution-processable nanoporous organic polymer (1-BPy-Pd) catalyst displays high catalytic performance (TON > 200K) in the heterogeneous Suzuki–Miyaura coupling (SMC) reaction and can be used for the preparation of the intermediates in the synthesis of pharmaceutical agents. In comparison to the homogeneous catalyst analogue (2,2′-BPy)PdCl2, the heterogenous system offers size-dependent catalytic activity when bulkier substrates are used. Furthermore, the catalyst can be used to create catalytic impellers that simplify its use and recovery. We found that this system also works for applications in heterogenous Heck and nitroarenes reduction reactions. The metal-binding nanoporous polymer reported here represents a versatile platform for size-selective heterogeneous and recyclable catalysts.

show abstract

“…1–3 Most of these catalysts are homogeneous and thus needed to be transformed into the corresponding heterogeneous systems to make the separation of products and catalysts easier and enable the reuse of catalysts. 4–7 To prepare heterogenous catalysts, various supports such as silica nanoparticles, 8–10 metal–organic frameworks, 11,12 covalent–organic frameworks, 13 and hyperbranched polymers, 14,15 have been widely used for the immobilization of catalytic components. 16–20 The cooperative catalysis between functional groups heavily relies on the spatial distributions of functional groups.…”

mentioning

confidence: 99%

Cooperative catalysis of Cu/2,2,6,6-tetramethyl-1-piperidine-N-oxyl nanocatalysts supported by ultraviolet light-responsive polyimides

et al. 2022

View full text Add to dashboard Cite

show abstract

Strategies to Immobilized Catalysts

Cited by 10 publications

References 165 publications

Pd-Nanoparticles-Catalyzed C(sp2)–H Arylation for the Synthesis of Functionalized Heterocycles: Recent Progress and Prospects

Pd-Nanoparticles-Catalyzed C(sp2)–H Arylation for the Synthesis of Functionalized Heterocycles: Recent Progress and Prospects

Versatile Nanoporous Organic Polymer Catalyst for the Size-Selective Suzuki–Miyaura Coupling Reaction

Cooperative catalysis of Cu/2,2,6,6-tetramethyl-1-piperidine-N-oxyl nanocatalysts supported by ultraviolet light-responsive polyimides

Contact Info

Product

Resources

About