scholarly journals Tailoring graphene-supported Ru nanoparticles by functionalization with pyrene-tagged N-heterocyclic carbenes

2022 ◽  
Author(s):  
Adrián García-Zaragoza ◽  
Christian Cerezo-Navarrete ◽  
Andres Mollar-Cuni ◽  
Pascual Oña-Burgos ◽  
Jose A. Mata ◽  
...  
Keyword(s):  
Metal Surface ◽  
Catalytic Properties ◽  
Heterocyclic Carbenes ◽  
Ruthenium Nanoparticles ◽  
Carbene Ligands ◽  
Ru Nanoparticles

The catalytic properties of graphene-supported ruthenium nanoparticles (Ru@rGO) have been finely tuned by modifying their metal surface with pyrene-tagged N-heterocyclic-carbene ligands (pyr-IMes). The nature and interaction modes of the pyr-IMes...

Transient, in situ synthesis of ultrafine ruthenium nanoparticles for a high-rate Li–CO2 battery

2019 ◽  
Vol 12 (3) ◽  
pp. 1100-1107 ◽  
Author(s):  
Yun Qiao ◽  
Shaomao Xu ◽  
Yang Liu ◽  
Jiaqi Dai ◽  
Hua Xie ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Porous Structure ◽  
Carbon Nanofibers ◽  
In Situ Synthesis ◽  
High Rate ◽  
Ruthenium Nanoparticles ◽  
High Performing ◽  
Activated Carbon Nanofibers ◽  
Ru Nanoparticles

Ultrafine Ru nanoparticles anchored on freestanding activated carbon nanofibers with porous structure are synthesized as a high performing cathode for Li–CO2 batteries via a transient, in situ thermal shock method.

New Route to Stabilize Ruthenium Nanoparticles with Non-Isolable Chiral N-Heterocyclic Carbenes

2015 ◽  
Vol 21 (48) ◽  
pp. 17495-17502 ◽  
Author(s):  
Luis Miguel Martínez-Prieto ◽  
Angélique Ferry ◽  
Patricia Lara ◽  
Christian Richter ◽  
Karine Philippot ◽  
...  
Keyword(s):  
Heterocyclic Carbenes ◽  
Ruthenium Nanoparticles

Further insights into the Ru nanoparticles–carbon interactions and their role in the catalytic properties

Carbon ◽  
2005 ◽  
Vol 43 (13) ◽  
pp. 2711-2722 ◽  
Author(s):  
M. Cerro-Alarcón ◽  
A. Maroto-Valiente ◽  
I. Rodríguez-Ramos ◽  
A. Guerrero-Ruiz
Keyword(s):  
Catalytic Properties ◽  
Ru Nanoparticles

scholarly journals What can NMR spectroscopy of selenoureas and phosphinidenes teach us about the π-accepting abilities of N-heterocyclic carbenes?

2015 ◽  
Vol 6 (3) ◽  
pp. 1895-1904 ◽  
Author(s):  
Sai V. C. Vummaleti ◽  
David J. Nelson ◽  
Albert Poater ◽  
Adrián Gómez-Suárez ◽  
David B. Cordes ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Chemical Shifts ◽  
Heterocyclic Carbenes ◽  
Carbene Ligands ◽  
Nmr Chemical Shifts ◽  
The Relationship

The relationship between the NMR chemical shifts of phosphinidene and selenourea compounds and the π-accepting ability of the related carbene ligands has been investigated.

scholarly journals Bi- and trinuclear copper(I) complexes of 1,2,3-triazole-tethered NHC ligands: synthesis, structure, and catalytic properties

2016 ◽  
Vol 12 ◽  
pp. 863-873 ◽  
Author(s):  
Shaojin Gu ◽  
Jiehao Du ◽  
Jingjing Huang ◽  
Huan Xia ◽  
Ling Yang ◽  
...  
Keyword(s):  
Room Temperature ◽  
Copper Complexes ◽  
Catalytic Properties ◽  
Polynuclear Complexes ◽  
Carbene Ligands ◽  
Efficient Catalyst ◽  
X Ray ◽  
X Ray Crystallography ◽  
Air Atmosphere ◽  
Highly Active

A series of copper complexes (3–6) stabilized by 1,2,3-triazole-tethered N-heterocyclic carbene ligands have been prepared via simple reaction of imidazolium salts with copper powder in good yields. The structures of bi- and trinuclear copper complexes were fully characterized by NMR, elemental analysis (EA), and X-ray crystallography. In particular, [Cu2(L2)2](PF6)2 (3) and [Cu2(L3)2](PF6)2 (4) were dinuclear copper complexes. Complexes [Cu3(L4)2](PF6)3 (5) and [Cu3(L5)2](PF6)3 (6) consist of a triangular Cu3 core. These structures vary depending on the imidazolium backbone and N substituents. The copper–NHC complexes tested are highly active for the Cu-catalyzed azide–alkyne cycloaddition (CuAAC) reaction in an air atmosphere at room temperature in a CH3CN solution. Complex 4 is the most efficient catalyst among these polynuclear complexes in an air atmosphere at room temperature.

Solid state synthesis of Ru–MC with highly dispersed semi-embedded ruthenium nanoparticles in a porous carbon framework for benzoic acid hydrogenation

2016 ◽  
Vol 6 (19) ◽  
pp. 7259-7266 ◽  
Author(s):  
Zhengliang Jiang ◽  
Guojun Lan ◽  
Xiaoyan Liu ◽  
Haodong Tang ◽  
Ying Li
Keyword(s):  
Benzoic Acid ◽  
Ruthenium Nanoparticles ◽  
Excellent Performance ◽  
Ru Nanoparticles ◽  
Carbon Framework ◽  
Dry Grinding ◽  
Highly Dispersed ◽  
Aromatic Hydrogenation ◽  
Carbon Catalysts ◽  
Cyclohexane Carboxylic Acid

A dry grinding approach was reported for mesoporous Ru–carbon catalysts with semi-embedded Ru nanoparticles, which shows excellent performance in aromatic hydrogenation of benzoic acid to cyclohexane carboxylic acid.

scholarly journals Abnormal N-heterocyclic Carbenes: More than Just Exceptionally Strong Donor Ligands

2011 ◽  
Vol 64 (8) ◽  
pp. 1113 ◽  
Author(s):  
Anneke Krüger ◽  
Martin Albrecht
Keyword(s):  
Water Oxidation ◽  
Bond Activation ◽  
Heterocyclic Carbenes ◽  
Oxidation Catalysis ◽  
Donor Ligands ◽  
Free Alcohol ◽  
Carbene Ligands ◽  
Transfer Processes ◽  
Oxidative Transformations ◽  
Electron Transfer Processes

Complexes comprising a so-called abnormal carbene ligand, which displays pronounced mesoionic character, have recently been shown to be competent catalyst precursors for bond activation processes and oxidative transformations, including base-free alcohol oxidation and water oxidation. In this highlight we propose that these abnormal carbene ligands are not just useful spectator ligands but also actively participate in the bond activation step. This mode of action is partially based on the exceptionally strong donor properties of the ligand and, specifically, on the mesoionic character of these abnormal carbenes. The mesoionic properties provide a reservoir for charges and holes and thus induce efficient ligand-metal cooperativity, which is beneficial in particular for oxidation catalysis that involves concerted proton and electron transfer processes.

Physicochemical and catalytic properties of ruthenium nanoparticles obtained in reverse micelles

2013 ◽  
Vol 49 (4) ◽  
pp. 471-478 ◽  
Author(s):  
A. A. Revina ◽  
M. A. Kuznetsov ◽  
S. A. Busev ◽  
O. A. Boeva ◽  
K. N. Zhavoronkova
Keyword(s):  
Reverse Micelles ◽  
Catalytic Properties ◽  
Ruthenium Nanoparticles
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