Entangled Pd complexes over Fe3O4@SiO2 as supported catalysts for hydrogenation and Suzuki reactions

Wang, Peng; Liu, Hengzhi; Niu, Jianrui; Li, Rong; Ma, Jiantai

doi:10.1039/c3cy00646h

Cited by 64 publications

(22 citation statements)

References 59 publications

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“…In a very recent study, Li and Ma have described a method to entangle Pd complexes in Fe 3 O 4 @SiO 2 magnetic nanoparticles. It is believed that the catalyst plays two important roles: one, it increases the stability of the Pd 0 and Pd II nanoparticles; two, it prevents metal leaching during the reaction, because of its surface cross‐linked groups (Scheme ) 74. MNP‐ 44 has been successfully applied to hydrogenation and Suzuki reactions with high activity and durability.…”

Section: Cc Bond‐forming Reactionsmentioning

confidence: 99%

Recent Applications of Magnetically Recoverable Nanocatalysts in CC and CX Coupling Reactions

2015

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Magnetic nanoparticles have emerged recently as an alternative for the easy separation of nanosized catalysts from reaction mixtures by employing an external magnetic field. These magnetic nanoparticles have been used as supports for catalysts and/or as part of an active catalytic site. Herein, special attention is given to identify the main synthetic steps required to develop both precious‐ and nonprecious‐metal‐catalyzed CC and CX coupling reactions by using magnetically separable catalysts.

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Section: Cc Bond‐forming Reactionsmentioning

confidence: 99%

Recent Applications of Magnetically Recoverable Nanocatalysts in CC and CX Coupling Reactions

2015

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“…It is believed that the catalystp lays two important roles: one, it increases the stability of the Pd 0 and Pd II nanoparticles; two, it prevents metal leachingd uring the reaction, because of its surfacec ross-linked groups (Scheme 44). [74] MNP-44 has been successfully applied to hydrogenation and Suzuki reactions with high activity and durability.…”

Section: Ligand-functionalized Magnetic Nanoparticlesmentioning

confidence: 99%

ChemInform Abstract: Recent Applications of Magnetically Recoverable Nanocatalysts in C—C and C—X Coupling Reactions

2015

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“…While there have been many improvements to l-proline catalysed aldol reactions through the synthesis of efficient l-proline derivatives, further optimisation by incorporating magnetic properties to non-magnetic catalysts is of interest as the potential to reuse and recycle catalysts is one of their most desirable features [9][10][11][12]. For this reason, magnetic nanoparticles in the form of magnetite (Fe 3 O 4 ) offer the possibility to be used as magnetic supports due to their high surface area, dispersibility and simple separation from reaction media with the aid of a magnet [13] In order to combine these magnetic properties to proline, a linker is also needed.…”

Section: Introductionmentioning

confidence: 99%

The effect of the sol–gel structure on the catalysis performance of l-proline

et al. 2019

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Two sol-gel materials based on tetraethylorthosilicate (TEOS) and a combination of methacryloxypropyltrimethoxysilane and zirconium propoxide were developed and used as host matrices for the organic catalyst (l-proline) and iron oxide nanoparticles with the objective of formulating a magnetic sol-gel catalyst. In order to investigate the effect of the sol-gel condensation process on the catalyst recyclability and the effect of the dopants on the structure of the sol-gel matrices, iron oxide nanoparticles and l-proline were introduced in the sol-gel matrices either during the sol-gel synthesis or at the end of the sol-gel synthesis. While both systems were successfully recycled three times when applied to the Aldol reaction, the TEOS based sol-gel material with the dopants introduced at the end of the sol-gel synthesis showed excellent reaction efficiency and recyclability with 99% conversion. In parallel, the zirconium sol-gel-based material did not enable any conversion. Remarkably, it is demonstrated that the process of introducing the dopants strongly effects the condensation of the inorganic networks of the sol-gel matrix by involving the organic catalyst in the catalysis of the condensation of the inorganic moieties. Furthermore, this condensation process is shown to play a major role in the mobility of the organic catalyst and therefore on its ability to be recycled. This study is, to our knowledge, the first that investigates the effect of the morphology and structure of sol-gel matrices on the catalytic performance of an organic catalyst.

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Entangled Pd complexes over Fe3O4@SiO2 as supported catalysts for hydrogenation and Suzuki reactions

Cited by 64 publications

References 59 publications

Recent Applications of Magnetically Recoverable Nanocatalysts in CC and CX Coupling Reactions

Recent Applications of Magnetically Recoverable Nanocatalysts in CC and CX Coupling Reactions

ChemInform Abstract: Recent Applications of Magnetically Recoverable Nanocatalysts in C—C and C—X Coupling Reactions

The effect of the sol–gel structure on the catalysis performance of l-proline

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