Karine Philippot - Academia.edu (original) (raw)
Papers by Karine Philippot
Advanced Functional Materials, Aug 2, 2007
The synthesis of shape controlled platinum nanoparticles has been investigated through an organom... more The synthesis of shape controlled platinum nanoparticles has been investigated through an organometallic approach starting from the complex Pt2(dba)3 and using a long alkyl chain amine, hexadecylamine (HDA), as stabilizer. The influence of the experimental parameters (reactive gas and solvent nature, stabilizer/metal ratio, reactants concentration, temperature) on the shape of the Pt nanoparticles has been studied. Various shaped platinum nanostructures such as isolated nanoparticles, dendrites or crystalline nanowires were obtained, depending on the reaction conditions. This method takes profit of the mild conditions of chemistry in solution and allows obtaining regular nanostructures, most of them being homogeneous in shape as well as in size (isolated nanoparticles) or diameter/length (nanowires). Transmission electron microscopy and wide‐angle X‐ray scattering were used as characterization techniques. Beside the Knight‐shift effect of platinum, NMR solution investigations clearly evidenced the coordination of the amine at the Pt particles surface and its mobility. This mobility, increased when H2 is used as reactive gas for the precursor decomposition, favors the particles coalescence into nanowires. This phenomenon is also favored by the “soft” template character of the amine in particular in toluene solution.
Advanced Functional Materials, Oct 4, 2007
RuO 2 @SiO 2 nanomaterials have been prepared using hybrid mesostructured silica (EtO) 2 P(O)(CH ... more RuO 2 @SiO 2 nanomaterials have been prepared using hybrid mesostructured silica (EtO) 2 P(O)(CH 2) 3 SiO 1.5 /xSiO 2 (x = 9, 16) by anchoring the metal precursor [Ru(COD)(COT)] (COD = 1, 3-cyclooctadiene, COT = 1, 3, 5-cyclooctatriene) within the pores of the organized silica matrix taking profit of the phosphonate moieties followed by i) decomposition under dihydrogen atmosphere at room temperature in THF to achieve ruthenium nanoparticles containing materials and ii) a solid state thermal treatment at 450°C under air. The Ru and RuO 2 nanoparticles containing materials have been characterised by elemental analysis, Transmission Electron Microscopy (TEM), X-Ray Diffraction (XRD), nitrogen sorption measurements and 31 P and 13 C Nuclear Magnetic Resonance (NMR). The so-obtained RuO 2 @SiO 2 nanomaterials were evaluated as catalytic filters when deposited onto gas sensors for the preferential detection of propane in a multicomponent gas mixture propane/carbon monoxide/nitrogen dioxide.
RSC Advances, 2016
New supramolecular assemblies as protective agents of rhodium(0) nanoparticles for hydrogenation ... more New supramolecular assemblies as protective agents of rhodium(0) nanoparticles for hydrogenation of various substrates in water.
ACS Catalysis, 2014
HAL is a multidisciplinary open access archive for the deposit and dissemination of scientific re... more HAL is a multidisciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.
New J. Chem., 2006
The reaction of coordinatively unsaturated Co(II) PCP pincer complexes with nitric oxide leads to... more The reaction of coordinatively unsaturated Co(II) PCP pincer complexes with nitric oxide leads to the formation of new, air-stable, diamagnetic mono nitrosyl compounds. The synthesis and characterization of fiveand four-coordinate Co(III) and Co(I) nitrosyl pincer complexes based on three different ligand scaffolds is described. Passing NO through a solution of [Co(PCP NMe-iPr)Cl], [Co(PCP O-iPr)Cl] or [Co(PCP CH2-iPr)Br] led to the formation of the low-spin complex [Co(PCP-iPr)(NO)-X] with a strongly bent NO ligand. Treatment of the latter species with (X = Cl, Br) AgBF 4 led to chloride abstraction and formation of cationic square-planar Co(I) complexes of the type [Co(PCP-iPr)(NO)] + featuring a linear NO group. This reaction could be viewed as a formal two electron reduction of the metal center by the NO radical from Co(III) to Co(I), if NO is counted as NO +. Hence, these systems can be described as {CoNO} 8 according to the Enemark−Feltham convention. X-ray structures, spectroscopic and electrochemical data of all nitrosyl complexes are presented. Preliminary studies show that [Co(PCP NMe-iPr)(NO)] + catalyzes efficiently the reductive hydroboration of nitriles with pinacolborane (HBpin) forming an intermediate {CoNO} 8 hydride species.
Journal of the American Chemical Society, 2004
Palladium nanoparticles (4 nm, fcc) were prepared through decomposition of [Pd2(dba)3] by H2 in t... more Palladium nanoparticles (4 nm, fcc) were prepared through decomposition of [Pd2(dba)3] by H2 in the presence of a chiral xylofuranoside diphosphite. These particles catalyze the allylic alkylation of rac-3-acetoxy-1,3-diphenyl-1-propene with dimethyl malonate leading to an almost total conversion of the (R) enantiomer and almost no reaction with the (S). This gives rise to 97% ee for the alkylation product and a kinetic resolution of the substrate recovered with ca. 90% ee. This behavior was compared to that of a molecular catalyst at various dilutions, and the differences between the two systems are discussed. This is the first colloidal system shown to display such a high enantioselectivity besides the well-known Pt/cinchonidine system.
Journal of Organometallic Chemistry, 2004
The synthesis of palladium nanoparticles is performed by hydrogenation of a precursor, Pd2(dba)3 ... more The synthesis of palladium nanoparticles is performed by hydrogenation of a precursor, Pd2(dba)3 (1) or [Pd(C3H5)Cl]2 (2) in the presence of either a weakly coordinating ligand (hexadecylamine, HDA) or good ligands (polyphosphines). It is shown in the case of 1 that good ligands lead to stable spherical nanoparticles of small size (near 2 nm) whereas the protective effect of HDA
Advanced Synthesis & Catalysis, 2007
Palladium nanoparticles (Pd1-Pd3) stabilized by chiral diphosphite ligands (1-3), were synthesize... more Palladium nanoparticles (Pd1-Pd3) stabilized by chiral diphosphite ligands (1-3), were synthesized and tested as catalysts for the allylic alkylation reaction, using different substrates (rac-I, rac-III and rac-V). Carbohydrate ligands (1 and 2), only differing in the C-3 configuration, led to a remarkable difference in stability of the corresponding nanoparticles: while Pd1 is a robust catalyst, Pd2 decomposes into molecular species. In addition, the high enantioselective systems, Pd1 and Pd3, are only active for a substrate containing phenyl groups. Concerning the catalytic behaviour of the corresponding molecular systems, palladium complexes coordinated to ligands 1 or 3, gave excellent asymmetric inductions, but an analogous catalyst accommodating ligand 2, was not found selective.
Advanced Functional Materials, 2007
The synthesis of shape controlled platinum nanoparticles has been investigated through an organom... more The synthesis of shape controlled platinum nanoparticles has been investigated through an organometallic approach starting from the complex Pt2(dba)3 and using a long alkyl chain amine, hexadecylamine (HDA), as stabilizer. The influence of the experimental parameters (reactive gas and solvent nature, stabilizer/metal ratio, reactants concentration, temperature) on the shape of the Pt nanoparticles has been studied. Various shaped platinum nanostructures such as isolated nanoparticles, dendrites or crystalline nanowires were obtained, depending on the reaction conditions. This method takes profit of the mild conditions of chemistry in solution and allows obtaining regular nanostructures, most of them being homogeneous in shape as well as in size (isolated nanoparticles) or diameter/length (nanowires). Transmission electron microscopy and wide‐angle X‐ray scattering were used as characterization techniques. Beside the Knight‐shift effect of platinum, NMR solution investigations clearl...
Advanced Functional Materials, 2006
... [*] Dr. K. Philippot, Dr. B. Chaudret Laboratoire de Chimie de Coordination du CNRS 205 route... more ... [*] Dr. K. Philippot, Dr. B. Chaudret Laboratoire de Chimie de Coordination du CNRS 205 route de Narbonne, 31077-Toulouse Cedex 04 (France) E-mail: karine.philippot@lcc ... The Porod-law decrease shows an intensity oscillation at around 3.4 nm1 (gray arrow in Fig. ...
Advanced Functional Materials, 2007
RuO2@SiO2 nanomaterials are prepared using hybrid mesostructured silica (EtO)2P(O)(CH2)3SiO1.5/x ... more RuO2@SiO2 nanomaterials are prepared using hybrid mesostructured silica (EtO)2P(O)(CH2)3SiO1.5/x SiO2 (x = 9, 16) by anchoring the metal precursor [Ru(COD)(COT)] (COD is 1,3‐cyclooctadiene, COT is 1,3,5‐cyclooctatriene) inside the pores of the organized silica matrix through the phosphonate moieties. Following this task, the nanoparticles are fabricated by i) decomposing the metal precursor with hydrogen at room temperature in tetrahydrofuran to achieve ruthenium nanoparticles and ii) thermally treating the ruthenium particles in silica at 450 °C in air to fabricate RuO2. The materials containing Ru and RuO2 nanoparticles are characterized by elemental analysis, transmission electron microscopy (TEM), X‐ray diffraction (XRD), nitrogen sorption measurements, and 31P and 13C NMR. The obtained RuO2@SiO2 nanomaterials are evaluated as catalytic filters when deposited onto gas sensors for the preferential detection of propane in the multicomponent gas mixture propane/carbon monoxide/nitr...
New Journal of Chemistry, 2006
The reaction of coordinatively unsaturated Co(II) PCP pincer complexes with nitric oxide leads to... more The reaction of coordinatively unsaturated Co(II) PCP pincer complexes with nitric oxide leads to the formation of new, air-stable, diamagnetic mono nitrosyl compounds. The synthesis and characterization of fiveand four-coordinate Co(III) and Co(I) nitrosyl pincer complexes based on three different ligand scaffolds is described. Passing NO through a solution of [Co(PCP NMe-iPr)Cl], [Co(PCP O-iPr)Cl] or [Co(PCP CH2-iPr)Br] led to the formation of the low-spin complex [Co(PCP-iPr)(NO)-X] with a strongly bent NO ligand. Treatment of the latter species with (X = Cl, Br) AgBF 4 led to chloride abstraction and formation of cationic square-planar Co(I) complexes of the type [Co(PCP-iPr)(NO)] + featuring a linear NO group. This reaction could be viewed as a formal two electron reduction of the metal center by the NO radical from Co(III) to Co(I), if NO is counted as NO +. Hence, these systems can be described as {CoNO} 8 according to the Enemark−Feltham convention. X-ray structures, spectroscopic and electrochemical data of all nitrosyl complexes are presented. Preliminary studies show that [Co(PCP NMe-iPr)(NO)] + catalyzes efficiently the reductive hydroboration of nitriles with pinacolborane (HBpin) forming an intermediate {CoNO} 8 hydride species.
![Research paper thumbnail of [Ru(0)]@SiO 2 and [RuO 2 ]@SiO 2 Hybrid Nanomaterials: From Their Synthesis to Their Application as Catalytic Filters for Gas Sensors](https://attachments.academia-assets.com/90399903/thumbnails/1.jpg)
](Advanced Functional Materials, 2009
Nanoscale
A novel foam-like Ni@Ni(OH)2 composite nanomaterial, synthesized by an organometallic approach, e... more A novel foam-like Ni@Ni(OH)2 composite nanomaterial, synthesized by an organometallic approach, exhibited remarkable robustness and high catalytic performance for CO2 hydrogenation to formate.
Dalton Transactions
A series of ferrocenylphosphine-stabilized rhodium nanoparticles has been prepared in one pot fro... more A series of ferrocenylphosphine-stabilized rhodium nanoparticles has been prepared in one pot from the organometallic [Rh(3-C3H5)3] precursor. This complex has been decomposed by hydrogen treatment (3 bar) in dichloromethane in...
Chemical Communications
Herein we present ruthenium nanoparticles (Ru-NPs) stabilized with two rigid NHC ligands derived ... more Herein we present ruthenium nanoparticles (Ru-NPs) stabilized with two rigid NHC ligands derived from cholesterol.
Chemical communications (Cambridge, England), Jan 4, 2016
The synthesis and catalytic activity of long-chain NHC-stabilized RuNPs are presented. Full chara... more The synthesis and catalytic activity of long-chain NHC-stabilized RuNPs are presented. Full characterization of these novel nanostructures including surface state studies show that the ligand influences the number and the location of Ru active sites which impacts the NP catalytic activity, especially in hydrogenation reactions. The high stability and versatility of these nanosystems make them successful catalysts for both oxidation and hydrogenation reactions that can even be performed successively in a one pot-fashion.
Catal. Sci. Technol., 2016
Chiral iridium nanoparticles (IrNPs) were synthesized by H2 reduction of (1,5-cyclooctadiene)(met... more Chiral iridium nanoparticles (IrNPs) were synthesized by H2 reduction of (1,5-cyclooctadiene)(methoxy)iridium(i) dimer ([Ir(OMe)(COD)]2) in the presence of an asymmetric secondary phosphine oxide.
Advanced Functional Materials, Aug 2, 2007
The synthesis of shape controlled platinum nanoparticles has been investigated through an organom... more The synthesis of shape controlled platinum nanoparticles has been investigated through an organometallic approach starting from the complex Pt2(dba)3 and using a long alkyl chain amine, hexadecylamine (HDA), as stabilizer. The influence of the experimental parameters (reactive gas and solvent nature, stabilizer/metal ratio, reactants concentration, temperature) on the shape of the Pt nanoparticles has been studied. Various shaped platinum nanostructures such as isolated nanoparticles, dendrites or crystalline nanowires were obtained, depending on the reaction conditions. This method takes profit of the mild conditions of chemistry in solution and allows obtaining regular nanostructures, most of them being homogeneous in shape as well as in size (isolated nanoparticles) or diameter/length (nanowires). Transmission electron microscopy and wide‐angle X‐ray scattering were used as characterization techniques. Beside the Knight‐shift effect of platinum, NMR solution investigations clearly evidenced the coordination of the amine at the Pt particles surface and its mobility. This mobility, increased when H2 is used as reactive gas for the precursor decomposition, favors the particles coalescence into nanowires. This phenomenon is also favored by the “soft” template character of the amine in particular in toluene solution.
Advanced Functional Materials, Oct 4, 2007
RuO 2 @SiO 2 nanomaterials have been prepared using hybrid mesostructured silica (EtO) 2 P(O)(CH ... more RuO 2 @SiO 2 nanomaterials have been prepared using hybrid mesostructured silica (EtO) 2 P(O)(CH 2) 3 SiO 1.5 /xSiO 2 (x = 9, 16) by anchoring the metal precursor [Ru(COD)(COT)] (COD = 1, 3-cyclooctadiene, COT = 1, 3, 5-cyclooctatriene) within the pores of the organized silica matrix taking profit of the phosphonate moieties followed by i) decomposition under dihydrogen atmosphere at room temperature in THF to achieve ruthenium nanoparticles containing materials and ii) a solid state thermal treatment at 450°C under air. The Ru and RuO 2 nanoparticles containing materials have been characterised by elemental analysis, Transmission Electron Microscopy (TEM), X-Ray Diffraction (XRD), nitrogen sorption measurements and 31 P and 13 C Nuclear Magnetic Resonance (NMR). The so-obtained RuO 2 @SiO 2 nanomaterials were evaluated as catalytic filters when deposited onto gas sensors for the preferential detection of propane in a multicomponent gas mixture propane/carbon monoxide/nitrogen dioxide.
RSC Advances, 2016
New supramolecular assemblies as protective agents of rhodium(0) nanoparticles for hydrogenation ... more New supramolecular assemblies as protective agents of rhodium(0) nanoparticles for hydrogenation of various substrates in water.
ACS Catalysis, 2014
HAL is a multidisciplinary open access archive for the deposit and dissemination of scientific re... more HAL is a multidisciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.
New J. Chem., 2006
The reaction of coordinatively unsaturated Co(II) PCP pincer complexes with nitric oxide leads to... more The reaction of coordinatively unsaturated Co(II) PCP pincer complexes with nitric oxide leads to the formation of new, air-stable, diamagnetic mono nitrosyl compounds. The synthesis and characterization of fiveand four-coordinate Co(III) and Co(I) nitrosyl pincer complexes based on three different ligand scaffolds is described. Passing NO through a solution of [Co(PCP NMe-iPr)Cl], [Co(PCP O-iPr)Cl] or [Co(PCP CH2-iPr)Br] led to the formation of the low-spin complex [Co(PCP-iPr)(NO)-X] with a strongly bent NO ligand. Treatment of the latter species with (X = Cl, Br) AgBF 4 led to chloride abstraction and formation of cationic square-planar Co(I) complexes of the type [Co(PCP-iPr)(NO)] + featuring a linear NO group. This reaction could be viewed as a formal two electron reduction of the metal center by the NO radical from Co(III) to Co(I), if NO is counted as NO +. Hence, these systems can be described as {CoNO} 8 according to the Enemark−Feltham convention. X-ray structures, spectroscopic and electrochemical data of all nitrosyl complexes are presented. Preliminary studies show that [Co(PCP NMe-iPr)(NO)] + catalyzes efficiently the reductive hydroboration of nitriles with pinacolborane (HBpin) forming an intermediate {CoNO} 8 hydride species.
Journal of the American Chemical Society, 2004
Palladium nanoparticles (4 nm, fcc) were prepared through decomposition of [Pd2(dba)3] by H2 in t... more Palladium nanoparticles (4 nm, fcc) were prepared through decomposition of [Pd2(dba)3] by H2 in the presence of a chiral xylofuranoside diphosphite. These particles catalyze the allylic alkylation of rac-3-acetoxy-1,3-diphenyl-1-propene with dimethyl malonate leading to an almost total conversion of the (R) enantiomer and almost no reaction with the (S). This gives rise to 97% ee for the alkylation product and a kinetic resolution of the substrate recovered with ca. 90% ee. This behavior was compared to that of a molecular catalyst at various dilutions, and the differences between the two systems are discussed. This is the first colloidal system shown to display such a high enantioselectivity besides the well-known Pt/cinchonidine system.
Journal of Organometallic Chemistry, 2004
The synthesis of palladium nanoparticles is performed by hydrogenation of a precursor, Pd2(dba)3 ... more The synthesis of palladium nanoparticles is performed by hydrogenation of a precursor, Pd2(dba)3 (1) or [Pd(C3H5)Cl]2 (2) in the presence of either a weakly coordinating ligand (hexadecylamine, HDA) or good ligands (polyphosphines). It is shown in the case of 1 that good ligands lead to stable spherical nanoparticles of small size (near 2 nm) whereas the protective effect of HDA
Advanced Synthesis & Catalysis, 2007
Palladium nanoparticles (Pd1-Pd3) stabilized by chiral diphosphite ligands (1-3), were synthesize... more Palladium nanoparticles (Pd1-Pd3) stabilized by chiral diphosphite ligands (1-3), were synthesized and tested as catalysts for the allylic alkylation reaction, using different substrates (rac-I, rac-III and rac-V). Carbohydrate ligands (1 and 2), only differing in the C-3 configuration, led to a remarkable difference in stability of the corresponding nanoparticles: while Pd1 is a robust catalyst, Pd2 decomposes into molecular species. In addition, the high enantioselective systems, Pd1 and Pd3, are only active for a substrate containing phenyl groups. Concerning the catalytic behaviour of the corresponding molecular systems, palladium complexes coordinated to ligands 1 or 3, gave excellent asymmetric inductions, but an analogous catalyst accommodating ligand 2, was not found selective.
Advanced Functional Materials, 2007
The synthesis of shape controlled platinum nanoparticles has been investigated through an organom... more The synthesis of shape controlled platinum nanoparticles has been investigated through an organometallic approach starting from the complex Pt2(dba)3 and using a long alkyl chain amine, hexadecylamine (HDA), as stabilizer. The influence of the experimental parameters (reactive gas and solvent nature, stabilizer/metal ratio, reactants concentration, temperature) on the shape of the Pt nanoparticles has been studied. Various shaped platinum nanostructures such as isolated nanoparticles, dendrites or crystalline nanowires were obtained, depending on the reaction conditions. This method takes profit of the mild conditions of chemistry in solution and allows obtaining regular nanostructures, most of them being homogeneous in shape as well as in size (isolated nanoparticles) or diameter/length (nanowires). Transmission electron microscopy and wide‐angle X‐ray scattering were used as characterization techniques. Beside the Knight‐shift effect of platinum, NMR solution investigations clearl...
Advanced Functional Materials, 2006
... [*] Dr. K. Philippot, Dr. B. Chaudret Laboratoire de Chimie de Coordination du CNRS 205 route... more ... [*] Dr. K. Philippot, Dr. B. Chaudret Laboratoire de Chimie de Coordination du CNRS 205 route de Narbonne, 31077-Toulouse Cedex 04 (France) E-mail: karine.philippot@lcc ... The Porod-law decrease shows an intensity oscillation at around 3.4 nm1 (gray arrow in Fig. ...
Advanced Functional Materials, 2007
RuO2@SiO2 nanomaterials are prepared using hybrid mesostructured silica (EtO)2P(O)(CH2)3SiO1.5/x ... more RuO2@SiO2 nanomaterials are prepared using hybrid mesostructured silica (EtO)2P(O)(CH2)3SiO1.5/x SiO2 (x = 9, 16) by anchoring the metal precursor [Ru(COD)(COT)] (COD is 1,3‐cyclooctadiene, COT is 1,3,5‐cyclooctatriene) inside the pores of the organized silica matrix through the phosphonate moieties. Following this task, the nanoparticles are fabricated by i) decomposing the metal precursor with hydrogen at room temperature in tetrahydrofuran to achieve ruthenium nanoparticles and ii) thermally treating the ruthenium particles in silica at 450 °C in air to fabricate RuO2. The materials containing Ru and RuO2 nanoparticles are characterized by elemental analysis, transmission electron microscopy (TEM), X‐ray diffraction (XRD), nitrogen sorption measurements, and 31P and 13C NMR. The obtained RuO2@SiO2 nanomaterials are evaluated as catalytic filters when deposited onto gas sensors for the preferential detection of propane in the multicomponent gas mixture propane/carbon monoxide/nitr...
New Journal of Chemistry, 2006
The reaction of coordinatively unsaturated Co(II) PCP pincer complexes with nitric oxide leads to... more The reaction of coordinatively unsaturated Co(II) PCP pincer complexes with nitric oxide leads to the formation of new, air-stable, diamagnetic mono nitrosyl compounds. The synthesis and characterization of fiveand four-coordinate Co(III) and Co(I) nitrosyl pincer complexes based on three different ligand scaffolds is described. Passing NO through a solution of [Co(PCP NMe-iPr)Cl], [Co(PCP O-iPr)Cl] or [Co(PCP CH2-iPr)Br] led to the formation of the low-spin complex [Co(PCP-iPr)(NO)-X] with a strongly bent NO ligand. Treatment of the latter species with (X = Cl, Br) AgBF 4 led to chloride abstraction and formation of cationic square-planar Co(I) complexes of the type [Co(PCP-iPr)(NO)] + featuring a linear NO group. This reaction could be viewed as a formal two electron reduction of the metal center by the NO radical from Co(III) to Co(I), if NO is counted as NO +. Hence, these systems can be described as {CoNO} 8 according to the Enemark−Feltham convention. X-ray structures, spectroscopic and electrochemical data of all nitrosyl complexes are presented. Preliminary studies show that [Co(PCP NMe-iPr)(NO)] + catalyzes efficiently the reductive hydroboration of nitriles with pinacolborane (HBpin) forming an intermediate {CoNO} 8 hydride species.
Advanced Functional Materials, 2009
Nanoscale
A novel foam-like Ni@Ni(OH)2 composite nanomaterial, synthesized by an organometallic approach, e... more A novel foam-like Ni@Ni(OH)2 composite nanomaterial, synthesized by an organometallic approach, exhibited remarkable robustness and high catalytic performance for CO2 hydrogenation to formate.
Dalton Transactions
A series of ferrocenylphosphine-stabilized rhodium nanoparticles has been prepared in one pot fro... more A series of ferrocenylphosphine-stabilized rhodium nanoparticles has been prepared in one pot from the organometallic [Rh(3-C3H5)3] precursor. This complex has been decomposed by hydrogen treatment (3 bar) in dichloromethane in...
Chemical Communications
Herein we present ruthenium nanoparticles (Ru-NPs) stabilized with two rigid NHC ligands derived ... more Herein we present ruthenium nanoparticles (Ru-NPs) stabilized with two rigid NHC ligands derived from cholesterol.
Chemical communications (Cambridge, England), Jan 4, 2016
The synthesis and catalytic activity of long-chain NHC-stabilized RuNPs are presented. Full chara... more The synthesis and catalytic activity of long-chain NHC-stabilized RuNPs are presented. Full characterization of these novel nanostructures including surface state studies show that the ligand influences the number and the location of Ru active sites which impacts the NP catalytic activity, especially in hydrogenation reactions. The high stability and versatility of these nanosystems make them successful catalysts for both oxidation and hydrogenation reactions that can even be performed successively in a one pot-fashion.
Catal. Sci. Technol., 2016
Chiral iridium nanoparticles (IrNPs) were synthesized by H2 reduction of (1,5-cyclooctadiene)(met... more Chiral iridium nanoparticles (IrNPs) were synthesized by H2 reduction of (1,5-cyclooctadiene)(methoxy)iridium(i) dimer ([Ir(OMe)(COD)]2) in the presence of an asymmetric secondary phosphine oxide.