Pd nanoparticles immobilized on the poly-dopamine decorated halloysite nanotubes hybridized with N-doped porous carbon monolayer: A versatile catalyst for promoting Pd catalyzed reactions

Sadjadi, Samahe; Lazzara, Giuseppe; Malmir, Masoumeh; Heravi, Majid M.

doi:10.1016/j.jcat.2018.08.013

Cited by 107 publications

(41 citation statements)

References 48 publications

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“…In continuation of our research on the development of environmentally‐benign catalytic protocols for chemical transformations, including hydrogenation reaction, recently we have disclosed the outstanding performance of Hal as a catalyst support in its functionalized or hybrid forms . To shed light to the chemistry of Hal, we exploited both experimental and computational chemistry and attempted to find the relationship between the structural features and catalytic activities of Hal‐based catalysts .…”

Section: Introductionmentioning

confidence: 99%

Study of the effect of the ligand structure on the catalytic activity of Pd@ ligand decorated halloysite: Combination of experimental and computational studies

Dehghani

Sadjadi

Bahri‐Laleh

et al. 2019

Applied Organom Chemis

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Taking advantage of computational chemistry, the best diamine for the synthesis of a multi‐dentate ligand from the reaction with 3‐(trimethoxysilyl) propylisocyanate (TEPI) was selected. Actually, predictive Density Functional Theory (DFT) calculations provided the right diamino chain, i.e. ethylenediamine, capable to sequester a palladium atom, together with the relatively polar solvent toluene, and then undergo the experiments as a selective catalytic agent. The ligand was then prepared and applied for the decoration of the halloysite (Hal) outer surface to furnish an efficient support for the immobilization of Pd nanoparticles. The resulting catalyst exhibited high catalytic activity for hydrogenation of nitroarenes. Moreover, it showed high selectivity towards nitro functional group. The study of the catalyst recyclability confirmed that the catalyst could be recycled for several reaction runs with only slight loss of the catalytic activity and Pd leaching. Hot filtration test also proved the heterogeneous nature of the catalysis.

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Section: Introductionmentioning

confidence: 99%

Study of the effect of the ligand structure on the catalytic activity of Pd@ ligand decorated halloysite: Combination of experimental and computational studies

Dehghani

Sadjadi

Bahri‐Laleh

et al. 2019

Applied Organom Chemis

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“…Motivated by the previous results on the high catalytic activity of Hal‐carbon composites, in the second part of this study, it was elucidated whether carbonization of Pd@Hal‐P‐CD has a positive effect on the catalytic activity of the catalyst. In this line, Pd@Hal‐P‐CD was carbonized, characterized and the catalytic activity of the resulting catalyst, Pd@Hal‐C, for promoting the hydrogenation of the model reaction under similar reaction condition was measured (Entry 1, Table ) and compared with that of Pd@Hal‐P‐CD.…”

Section: Resultsmentioning

confidence: 99%

“…In the continuation of our research on the development of efficient Hal‐based heterogeneous catalysts, recently, we have reported a novel catalyst with the utility for coupling reaction, in which Pd nanoparticles were immobilized on the composite of poly (glycidyl methacrylate) and Hal, in which Hal was covered with a shell of poly (glycidyl methacrylate) . The composite was simply synthesized through functionalization of Hal surface with 3‐(trimethoxysilyl) propyl methacrylate followed by the polymerization with glycidyl methacrylate (M) monomer.…”

Section: Introductionmentioning

confidence: 99%

Palladated cyclodextrin and halloysite containing polymer and its carbonized form as efficient hydrogenation catalysts

Sadjadi

Koohestani

Léger

et al. 2019

Applied Organom Chemis

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β-Cyclodextrin (β-CD) and glycidyl methacrylate monomer were polymerized in the presence of functionalized halloysite nanoclay (Hal) to afford a polymeric network (Hal-P-CD) containing Hal and CD. Hal-P-CD was then applied as a catalyst support for the immobilization of Pd nanoparticles. The resulting nanocomposite, Pd@Hal-P-CD, could serve as a catalyst for the hydrogenation of nitrobenzene. The precise study by the preparation of control samples confirmed the contribution of CD as both phase transfer and capping agent, P (polymer) and Hal to the catalysis. Moreover, the results confirmed the importance of CD: glycidyl methacrylate monomer ratio. Pd@Hal-P-CD was also carbonized to prepare Pd@Hal-C. Notably, the characterization of Pd@Hal-C showed that carbonization led to the growth of mean diameter of Pd nanoparticles, increase of Pd content and partial destruction of Hal. However, the catalytic activity of Pd@Hal-C was superior to Pd@Hal-P-CD. Pd@Hal-C was also highly recyclable and could be recovered and recycled for several reaction runs.The study of the carbonization temperature showed that this factor affected the nature of the resulting carbon and the catalyst prepared at elevated temperature showed higher catalytic activity.

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“…In continuation of our research on the heterogeneous catalysts, we have recently focused on CDNS as well as magnetic nanoparticles . More recently, we have tried to develop novel hybrid catalytic systems based on CDNS, benefiting from the capability of formation of inclusion complexes and the chemistry of other components of hybrid system .…”

Section: Introductionmentioning

confidence: 94%

Pd@magnetic Carbon Dot Immobilized on the Cyclodextrin Nanosponges ‐ Biochar Hybrid as an Efficient Hydrogenation Catalyst

et al. 2019

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With the aim of benefiting from the advantage of magnetic catalysts, chemistry of cyclodextrin, i. e. the capability of formation of inclusion complex and acting as phase transferring agent, as well as biochars as biocompatible, cost‐effective and efficient catalyst support, for the first time a ternary hybrid system composed of cyclodextrin nanosponges (CDNS), palladated magnetic carbon quantum dot (Pd@CQDs@Fe) and Bell‐pepper‐derived biochar (Biochar) was designed and prepared through functionalization of CDNS and Biochar and their covalent conjugation followed by immobilization of Pd@CQDs@Fe. The hybrid system was characterized and then applied as a magnetic heterogeneous catalyst for promoting hydrogenation of nitroarenes. The results confirmed high catalytic activity, selectivity and recyclability of the catalyst (up to ten reaction runs) as well as low Pd leaching. Comparing the catalytic activity of the catalyst with some control samples, the contribution of CDNS, Biochar and CQDs@Fe to the catalysis was confirmed.

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Pd nanoparticles immobilized on the poly-dopamine decorated halloysite nanotubes hybridized with N-doped porous carbon monolayer: A versatile catalyst for promoting Pd catalyzed reactions

Abstract: MM. Pd nanoparticles immobilized on the poly-dopamine decorated halloysite nanotubes hybridized with N-doped porous carbon monolayer: A versatile catalyst for promoting Pd catalyzed reactions.

Cited by 107 publications

References 48 publications

Study of the effect of the ligand structure on the catalytic activity of Pd@ ligand decorated halloysite: Combination of experimental and computational studies

Study of the effect of the ligand structure on the catalytic activity of Pd@ ligand decorated halloysite: Combination of experimental and computational studies

Palladated cyclodextrin and halloysite containing polymer and its carbonized form as efficient hydrogenation catalysts

Pd@magnetic Carbon Dot Immobilized on the Cyclodextrin Nanosponges ‐ Biochar Hybrid as an Efficient Hydrogenation Catalyst

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