Insights into the effects of surface properties of oxides on the catalytic activity of Pd for C–C coupling reactions

Nanoscale ◽  
2015 ◽  
Vol 7 (7) ◽  
pp. 3016-3021 ◽  
Author(s):  
Sai Zhang ◽  
Jing Li ◽  
Wei Gao ◽  
Yongquan Qu
Keyword(s):  
Catalytic Activity ◽  
Surface Properties ◽  
Electron Density ◽  
Strong Evidence ◽  
Oxidative Addition ◽  
Coupling Reaction ◽  
Interfacial Effect ◽  
Coupling Reactions ◽  
High Concentration ◽  
Pd Catalysts

It has been experimentally found that ceria supports with strong basicity and high concentration of O-vacancies significantly enrich the electron density of Pd catalysts and accelerate the step of oxidative addition for C–C coupling reaction. The FTIR and XPS provide strong evidence supporting for this interfacial effect.

A graphdiyne-based carbon material for electroless deposition and stabilization of sub-nanometric Pd catalysts with extremely high catalytic activity

2019 ◽  
Vol 7 (21) ◽  
pp. 13142-13148 ◽  
Author(s):  
Liang-Liang Yang ◽  
Hong-Juan Wang ◽  
Juan Wang ◽  
Yu Li ◽  
Wen Zhang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Carbon Material ◽  
Electroless Deposition ◽  
Suzuki Coupling ◽  
High Catalytic Activity ◽  
Coupling Reactions ◽  
Pd Catalysts ◽  
Catalytic Activities

A new graphdiyne-based carbon material was synthesized as an ideal substrate for electroless deposition and stabilization of sub-nanometric Pd catalysts, which showed extremely high catalytic activities for the reduction of nitroarenes and Suzuki coupling reactions.

A highly efficient catalyst for Suzuki–Miyaura coupling reaction of benzyl chloride under mild conditions

RSC Advances ◽  
2014 ◽  
Vol 4 (69) ◽  
pp. 36437-36443 ◽  
Author(s):  
Zhenhong Guan ◽  
Buyi Li ◽  
Guoliang Hai ◽  
Xinjia Yang ◽  
Tao Li ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Benzyl Chloride ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
Coupling Reactions ◽  
Efficient Catalyst ◽  
Microporous Polymers ◽  
Mild Conditions ◽  
Highly Efficient ◽  
Cross Coupling Reactions

Microporous polymers with built-in triphenylphosphine palladium exhibit highly efficient catalytic activity for cross-coupling reactions of benzyl chloride under mild conditions.

Construction of light-harvesting system for enhanced catalytic performance of Pd nanoframes toward Suzuki coupling reaction

2017 ◽  
Vol 5 (21) ◽  
pp. 10150-10153 ◽  
Author(s):  
Lini Yang ◽  
Qi Zhan ◽  
Zhenni Wang ◽  
Qiang Chen ◽  
Jing Tong ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Light Harvesting ◽  
Coupling Reaction ◽  
Suzuki Coupling ◽  
Catalytic Performance ◽  
Coupling Reactions ◽  
Suzuki Coupling Reaction

Au octahedra have been encapsulated into Pd nanoframes to further enhance the catalytic activity of Pd nanoframes toward Suzuki coupling reactions.

Green synthesis of a palladium–polyaniline nanocomposite for green Suzuki–Miyaura coupling reactions

RSC Advances ◽  
2015 ◽  
Vol 5 (43) ◽  
pp. 33786-33791 ◽  
Author(s):  
Sunil Dutt ◽  
Raj Kumar ◽  
Prem Felix Siril
Keyword(s):  
Catalytic Activity ◽  
Green Synthesis ◽  
Coupling Reaction ◽  
Coupling Reactions ◽  
One Pot ◽  
One Pot Synthesis ◽  
Reaction In Water ◽  
Polyaniline Nanocomposite

One pot synthesis of the pd–polyaniline nanocomposite and its catalytic activity in Suzuki–Miyaura coupling reaction in water.

scholarly journals Facile Synthesis and Characterization of Palladium@Carbon Catalyst for the Suzuki-Miyaura and Mizoroki-Heck Coupling Reactions

2021 ◽  
Vol 11 (11) ◽  
pp. 4822
Author(s):  
Hamed M. Alshammari ◽  
Obaid F. Aldosari ◽  
Mohammad Hayal Alotaibi ◽  
Raja L. Alotaibi ◽  
Mosaed S. Alhumaimess ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Activated Carbon ◽  
Coupling Reaction ◽  
Aryl Halides ◽  
High Catalytic Activity ◽  
Coupling Reactions ◽  
Heck Coupling ◽  
Efficient Catalyst ◽  
X Ray ◽  
Suzuki Reactions

Palladium-based carbon catalysts (Pd/C) can be potentially applied as an efficient catalyst for Suzuki–Miyaura and Mizoroki–Heck coupling reactions. Herein, a variety of catalysts of palladium on activated carbon were prepared by varying the content of ‘Pd’ via an in situ reduction method, using hydrogen as a reducing agent. The as-prepared catalysts (0.5 wt % Pd/C, 1 wt % Pd/C, 2 wt % Pd/C and 3 wt % Pd/C) were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX) and Brunauer–Emmett–Teller (BET) analyses. The catalysts were tested as a coupling catalyst for Suzuki–Miyaura coupling reactions involving aryl halides and phenyl boronic acid. The optimization of the catalyst by varying the palladium content on the activated carbon yielded Pd/C catalysts with very high catalytic activity for Suzuki reactions of aryl halides and a Mizoroki–Heck cross-coupling reaction of 4-bromoanisol and acrylic acid in an aqueous medium. A high ‘Pd’ content and uniform ‘Pd’ impregnation significantly affected the activity of the catalysts. The catalytic activity of 3% Pd/C was found to make it a more efficient catalyst when compared with the other synthesized Pd/C catalysts. Furthermore, the catalyst reusability was also tested for Suzuki reactions by repeatedly performing the same reaction using the recovered catalyst. The 3% Pd/C catalyst displayed better reusability even after several reactions.

Pd–Co nanoalloys nested on CuO nanosheets for efficient electrocatalytic N2 reduction and room-temperature Suzuki–Miyaura coupling reaction

Nanoscale ◽  
2019 ◽  
Vol 11 (3) ◽  
pp. 1379-1385 ◽  
Author(s):  
Wenzhi Fu ◽  
Yudong Cao ◽  
Qianyi Feng ◽  
William R. Smith ◽  
Pei Dong ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Room Temperature ◽  
Coupling Reaction ◽  
Coupling Reactions ◽  
Ambient Conditions ◽  
Cuo Nanosheets

The nanoalloy structure greatly improves the catalytic activity for electrocatalytic N2 reduction and Suzuki–Miyaura coupling reactions under ambient conditions.

Synthesis of palladium-bidentate complex and its application in Sonogashira and Suzuki coupling reactions

2014 ◽  
Vol 68 (5) ◽  
Author(s):  
Boumediene Haddad ◽  
Didier Villemin ◽  
El-habib Belarbi
Keyword(s):  
Catalytic Activity ◽  
Bond Formation ◽  
Coupling Reaction ◽  
Suzuki Coupling ◽  
Complex Iii ◽  
Sonogashira Reaction ◽  
Coupling Reactions ◽  
Imidazolium Salt ◽  
Bidentate Complex ◽  
Phenylboronic Acids

AbstractA new palladium-bidentate complex [m-C6H4(CH2ImMe)2(PdCl2)] (III) was prepared in two steps. In the first step, [m-C6H4(CH2ImMeAgCl)2] (II) (Im = imidazole moiety) was obtained by reacting imidazolium salt [m-C6H4(CH2ImMe)2]Cl2 (I) (prepared by quaternisation of Nmethylimidazole with 1,3-bis(chloromethyl)benzene) and Ag2O in CH2Cl2. In the next step, treatment of (II) with Pd(CH3CN)2Cl2 afforded complex III which was evaluated for its catalytic activity for C-C bond-formation reactions by examining the coupling reaction of 3-iodoanisole with phenylacetylene in the Sonogashira reaction. In addition, 3-methoxybiphenyls were obtained with good to excellent yields by Suzuki coupling reactions of 3-iodoanisole with phenylboronic acids or phenylborates salts in the presence of this complex.

Biosynthesis of poly(ethylene glycol)-supported palladium nanoparticles using Colocasia esculenta leaf extract and their catalytic activity for Suzuki–Miyaura cross-coupling reactions

RSC Advances ◽  
2015 ◽  
Vol 5 (89) ◽  
pp. 72453-72457 ◽  
Author(s):  
Raju Kumar Borah ◽  
Hirak Jyoti Saikia ◽  
Abhijit Mahanta ◽  
Vijay Kumar Das ◽  
Utpal Bora ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
Coupling Reactions ◽  
Poly Ethylene Glycol ◽  
Cross Coupling Reactions ◽  
Cross Coupling Reaction ◽  
Supported Palladium ◽  
Poly Ethylene ◽  
Supported Pd

A green and efficient method for the synthesis of PEG supported Pd-NPs has been developed using aqueous extract of C. esculanta leaf. The prepared NPs show excellent catalytic activity for Suzuki–Miyaura cross-coupling reaction at room temperature.

scholarly journals Synthesis, Photophysical Properties and Catalytic Activity of Ƙ3-SCS Pincer Palladium (II) Complex of N,N'-Di-Tert-Butylbenzene-1,3-Dicarbothioamide Supported by DFT Analysis

2021 ◽  
Author(s):  
Debasish Das ◽  
S. Kannan ◽  
Mukesh Kumar ◽  
Biswajit Sadhu ◽  
Liladhar B. Kumbhare
Keyword(s):  
Catalytic Activity ◽  
Uv Light ◽  
Photophysical Properties ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
13C Nmr Spectroscopy ◽  
Coupling Reactions ◽  
X Ray ◽  
Cross Coupling Reactions ◽  
Vis Spectroscopy

The title complex [PdCl(L)] (1), is obtained from the reaction of SCS pincer ligand HL (where, HL = N,N'-di-tert-butylbenzene-1,3-dicarbothioamide) with lithium tetrachloropalladate (II) in methanol. The compound 1 is characterized by elemental analysis, FTIR, 1H, and 13C-NMR spectroscopy, UV-Vis spectroscopy, powder X-ray diffraction and X-ray crystallographic techniques. At room temperature, 1 emits luminescence light of wavelength 460 nm in the solid state upon excitation by UV light of wavelength 280 nm. The average emission lifetime indicates that, both the ligand and complex emission is fluorescence in nature and involves mainly ligand centers π-π* deexcitation. It also shows good catalytic activity towards Mizoroki-Heck and Suzuki-Miyaura cross-coupling reactions of aryl bromides with tert-butyl acrylate and p-tolylboronic acid respectively. For both type of reactions, more than 99% conversion of the substrates is found to occur for electronically activated p-nitro bromobenzene using 1 mol % of 1. Further, modern DFT calculations are performed to decipher the mechanistic insight on the preferable pathways of the Mizoroki-Heck cross-coupling reaction. Stepwise free energy of reactions for various probable reaction pathways suggest that the catalytic route has profound preference for Pd(0)-Pd(II) over Pd(II)-Pd(IV) pathway.<br>

scholarly journals Modified ultradispersed diamonds based catalytic systems in cross-coupling reactions

2021 ◽  
Vol 57 (1) ◽  
pp. 7-14
Author(s):  
A. A. Lugovski ◽  
G. A. Gusakov ◽  
M. P. Samtsov ◽  
V. A. Parhomenko ◽  
S. V. Adamchyk
Keyword(s):  
Catalytic Activity ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
Model Systems ◽  
High Catalytic Activity ◽  
Coupling Reactions ◽  
Catalytic Systems ◽  
Cross Coupling Reactions ◽  
Cross Coupling Reaction ◽  
Metallic Palladium

Methods for preparation of nanocomposites of modified detonation nanodiamonds (DND) with metallic palladium have been developed and their catalytic activity in the Suzuki-Miyaura cross-coupling reaction in various reaction media has been studied. Methods for the regeneration of palladium-containing nanocomposites from the reaction mixture have been developed. The high catalytic activity of nanocomposites is confirmed by kinetic analysis based on the results of chromatographic analysis of the reaction mixture and is comparable to the literature data about similar catalytic systems. Regenerated nanocomposites showed the retention of catalytic activity for 3 consecutive cross-coupling cycles on model systems.

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