Heterogeneous Pd catalysts supported on silica matrices

Opanasenko, Maksym; Štěpnička, Petr; Čejka, Jiřı́

doi:10.1039/c4ra11963k

Cited by 141 publications

(88 citation statements)

References 239 publications

(278 reference statements)

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“…Inorganic solid supports, such as metal oxides, carbon, zeolite, zirconia, hydrotalcite and clay, generally show higher thermal and mechanical resistances compared with their organic counterparts. Mesoporous silica and alumina supports are probably the most popular matrixes as inorganic solid supports due to the cost, large surface area and porosity, availability, mechanical robustness and facile synthesis [29][30][31]. Supporting the highly active nanocatalysts can avoid the problem of recycling and reusability.…”

Section: Non-magnetic Nanostructured Catalystsmentioning

confidence: 99%

Magnetically Separable and Sustainable Nanostructured Catalysts for Heterogeneous Reduction of Nitroaromatics

Shokouhimehr

2015

Catalysts

182

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This review is focused on the strategies and designs of magnetic nanostructured catalysts showing the enhanced and sustainable catalytic performances for the heterogeneous reduction of nitoaromatics. Magnetic catalysts have the benefits of easy recovery and reuse after the completion of the reactions and green chemical processes. Magnetic separation, among the various procedures for removing catalysts, not only obviates the requirement of catalyst filtration or centrifugation after the completion of reactions, but also provides a practical technique for recycling the magnetized nanostructured catalysts. Consequently, discussions will address the methodologies and exemplars for the reusable magnetic composite catalysts. Because the synthesis of ideal magnetic nanostructured catalysts is of primary importance in the development of high-quality sustainable processes, the designs, preparation methods and recyclability of various recoverable magnetic nanostructured catalysts are emphasized. The representative methods and strategies for the synthesis of durable and reusable magnetic nanostructured catalysts are highlighted. The advantages, disadvantages, recyclability and the efficiency of the introduced heterogeneous systems have been explored in the reduction of nitrobenzene derivatives.

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Section: Non-magnetic Nanostructured Catalystsmentioning

confidence: 99%

Magnetically Separable and Sustainable Nanostructured Catalysts for Heterogeneous Reduction of Nitroaromatics

Shokouhimehr

2015

Catalysts

182

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“…Mesoporous silica is an ideal support material for the preparation of highly active catalysts because of its high surface area, inert nature of silica, and functionalization ability [1][2][3][4][5][6][7][8][9][10]. Among various approaches to functionalizing mesoporous silica, silane-coupling reaction, a reaction between surface silanol and functional molecules containing a trialkoxy group, is one of the most common procedures for the preparation of a supported catalyst.…”

Section: Introductionmentioning

confidence: 99%

Effects of Mesopore Internal Surfaces on the Structure of Immobilized Pd-Bisphosphine Complexes Analyzed by Variable-Temperature XAFS and Their Catalytic Performances

et al. 2018

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Abstract:In this study, mesoporous and nonporous silica-supported Pd complexes were synthesized and characterized. Variable-temperature XAFS measurements and a curve-fitting analysis showed a slightly larger contribution of σ 2 static when the Pd complexes were on a nonporous support in comparison to a mesoporous support. In contrast, the catalytic performance of the attached Pd complex in the Suzuki-Miyaura cross-coupling reaction was not affected by such small differences in the static disorder of the Pd complex.

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“…In addition, different functional groups can be anchored to the silica surface to effectively immobilize and stabilize PdNPs. This can minimize possible metal leaching and allows the easy recovery and reuse of the catalyst, therefore playing a central role in C-C coupling reactions, generally under phosphine and copper-free heterogeneous conditions [70,71].…”

Section: Functionalized Silica-supported Palladium Catalystsmentioning

confidence: 99%

“…These results were compared with the non-supported homogeneous catalyst, and although the last was more active, it could not be recovered, catalyst 35 being reused five times with only a slight decrease on the activity. reuse of the catalyst, therefore playing a central role in C-C coupling reactions, generally under phosphine and copper-free heterogeneous conditions [70,71]. Conveniently functionalized silica particles have been prepared by grafting methods, serving as support to immobilized palladium catalysts.…”

Section: Functionalized Silica-supported Palladium Catalystsmentioning

confidence: 99%

Solid-Supported Palladium Catalysts in Sonogashira Reactions: Recent Developments

et al. 2018

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Abstract:The Sonogashira cross-coupling reaction is the most frequently employed synthetic procedure for the preparation of arylated alkynes, which are important conjugated compounds with multiple applications. Despite of their rather high price, this reaction is usually catalyzed by palladium species, making the recovery and reuse of the catalyst an interesting topic, mainly for industrial purposes. Easy recycle can be achieved anchoring the palladium catalyst to a separable support. This review shows recent developments in the use of palladium species anchored to different solid supports as recoverable catalysts for Sonogashira cross-coupling reactions.

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Heterogeneous Pd catalysts supported on silica matrices

Abstract: Features, advantages and limitations associated with palladium catalysts deposited over various siliceous supports in different types of practically useful organic transformations are reviewed.

Cited by 141 publications

References 239 publications

Magnetically Separable and Sustainable Nanostructured Catalysts for Heterogeneous Reduction of Nitroaromatics

Magnetically Separable and Sustainable Nanostructured Catalysts for Heterogeneous Reduction of Nitroaromatics

Effects of Mesopore Internal Surfaces on the Structure of Immobilized Pd-Bisphosphine Complexes Analyzed by Variable-Temperature XAFS and Their Catalytic Performances

Solid-Supported Palladium Catalysts in Sonogashira Reactions: Recent Developments

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