Gilles Alcaraz - Academia.edu (original) (raw)

Papers by Gilles Alcaraz

Research paper thumbnail of A Highly Effective Ruthenium System for the Catalyzed Dehydrogenative Cyclization of Amine-Boranes to Cyclic Boranes under Mild Conditions

Chemistry (Weinheim an der Bergstrasse, Germany), Jan 7, 2015

We recently disclosed a new ruthenium-catalyzed dehydrogenative cyclization process (CDC) of diam... more We recently disclosed a new ruthenium-catalyzed dehydrogenative cyclization process (CDC) of diamine-monoboranes leading to cyclic diaminoboranes. In the present study, the CDC reaction has been successfully extended to a larger number of diamine-monoboranes (4-7) and to one amine-borane alcohol precursor (8). The corresponding NB(H)N- and NB(H)O-containing cyclic diaminoboranes (12-15) and oxazaborolidine (16) were obtained in good to high yields. Multiple substitution patterns on the starting amine-borane substrates were evaluated and the reaction was also performed with chiral substrates. Efforts have been spent to understand the mechanism of the ruthenium CDC process. In addition to a computational approach, a strategy enabling the kinetic discrimination on successive events of the catalytic process leading to the formation of the NB(H)N linkage was performed on the six-carbon chain diamine-monoborane 21 and completed with a (15) N NMR study. The long-life bis-σ-borane ruthenium...

Research paper thumbnail of NMR: A good tool to ascertain σ-silane or σ-borane formulations?

Coordination Chemistry Reviews, 2008

NMR has played a major role in the characterization of dihydrogen complexes and a number of polyh... more NMR has played a major role in the characterization of dihydrogen complexes and a number of polyhydrides have been reformulated as dihydrogen complexes on the basis of NMR data. If dihydrogen complexes remain the most widely studied class of σ-complexes, silane compounds are also well recognized as an important family of σ-complexes and more recently a few σ-borane compounds have

Research paper thumbnail of ChemInform Abstract: Coordination and Dehydrogenation of Amine-Boranes at Metal Centers

Research paper thumbnail of Mesitylborane as a bis(sigma-B-H) ligand: an unprecedented bonding mode to a metal center

Journal of the American Chemical Society, Jan 18, 2007

Research paper thumbnail of Synthesis and evolution of phosphanylcarbene?borane adducts

Journal of the Chemical Society, Chemical Communications, 1993

... Adducts Gilles Alcaraz, Robert Reed, Antoine Baceiredo and Guy Bertrand" Laboratoire... more ... Adducts Gilles Alcaraz, Robert Reed, Antoine Baceiredo and Guy Bertrand" Laboratoire de Chimie de Coordination du CNRS, 205, route de Narbonne, 31077 Toulouse Cedex, France ... go%).? Downloaded by google on 24 April 2011 ...

Research paper thumbnail of ChemInform Abstract: Bis σ-Bond Dihydrogen and Borane Ruthenium Complexes: Bonding Nature, Catalytic Applications, and Reversible Hydrogen Release

Research paper thumbnail of Ruthenium, Rhodium, and Iridium Bis(σ-B−H) Diisopropylaminoborane Complexes †

Organometallics, 2010

ABSTRACT The coordination chemistry of diisopropylaminoborane H2B−NiPr2 with valence isoelectroni... more ABSTRACT The coordination chemistry of diisopropylaminoborane H2B−NiPr2 with valence isoelectronic metal fragments to form, essentially isostructural, [MH2(η2:η2-H2B−NiPr2)(PCy3)2]n+ (M = Ru, n = 0; Rh and Ir, n = 1) has been explored by a combination of X-ray crystallography, NMR spectroscopy, and computational techniques. In the solid state and solution the aminoborane interacts with the metal centers through one four-center four-electron interaction, forming bis(σ-B−H) complexes. The structural data point to tighter interactions between both the Ru and Ir congeners compared to the Rh with significantly shorter M···B distances in the first two. These tighter interactions are mirrored in the spectroscopic data, with the Ru and Ir complexes showing more deshielded 11B chemical shifts and 1H M−H−B resonances that are more shielded than observed for the rhodium complex. Analysis of the bonding between metal and borane using the NBO approach is in very good agreement with the variations in the geometrical and spectroscopic parameters. There is overall a stronger interaction between the borane and the metal fragment for neutral Ru compared to cationic Rh, with cationic Ir in an intermediate situation.

Research paper thumbnail of Dispirofluorene-indenofluorene (DSFIF): Synthesis, Electrochemical, and Optical Properties of a Promising New Family of Luminescent Materials

Organic Letters, 2006

A series of new dispiro[fluorene-9′,6,9′′,12-indeno[1,2b]fluorenes] (DSFIFs) that combine indenof... more A series of new dispiro[fluorene-9′,6,9′′,12-indeno[1,2b]fluorenes] (DSFIFs) that combine indenofluorene (IF) and spirobifluorene (SBF) architectural specificities have been prepared. Their anodic oxidations lead to the formation of nonsoluble transparent polymers. The photophysical and electrochemical properties of these new molecules have been evaluated for further blue OLED applications.

Research paper thumbnail of A Terminal Borylene Ruthenium Complex: From B−H Activation to Reversible Hydrogen Release

Journal of the American Chemical Society, 2008

Starting from RuHCl(H2)(PCy3)2, a terminal ruthenium mesitylborylene complex was obtained via dou... more Starting from RuHCl(H2)(PCy3)2, a terminal ruthenium mesitylborylene complex was obtained via double B-H bond activation of mesitylborane and concomitant release of dihydrogen, such a process being remarkably reversible.

Research paper thumbnail of Mesitylborane as a Bis(σ-B−H) Ligand:  An Unprecedented Bonding Mode to a Metal Center

Journal of the American Chemical Society, 2007

... Gilles Alcaraz,* † Eric Clot,* ‡ Ulrike Helmstedt, ‡ Laure Vendier, † and Sylviane Sabo-Etien... more ... Gilles Alcaraz,* † Eric Clot,* ‡ Ulrike Helmstedt, ‡ Laure Vendier, † and Sylviane Sabo-Etienne* †. ... 13) Crestani, MG; Muñoz-Hernández, M.; Arévalo, A.; Acosta-Ramírez, A.; García, JJ J. Am. Chem. Soc.2005, 127, 18066−18073. ...

Research paper thumbnail of Tert-butylborane: A bis (σ-B–H) ligand in ruthenium hydride chemistry

Journal of Organometallic Chemistry, 2009

The reaction of tert-butylborane with the bis(dihydrogen) complex RuH2(η2-H2)2(PCy3)2 leads to th... more The reaction of tert-butylborane with the bis(dihydrogen) complex RuH2(η2-H2)2(PCy3)2 leads to the corresponding bis σ-borane complex which is the first example of a monoalkylborane ruthenium bis σ-complex. An alternative route involves the reaction of RuHCl(η2-H2)(PCy3)2 with lithium tert-butylborohydride.

Research paper thumbnail of Stereospecific palladium-catalyzed borylation reaction of 1-alkenyl halides with diispropylaminoborane

Journal of Organometallic Chemistry, 2005

Stereospecific Palladium-Catalyzed Borylation Reaction of 1-Alkenyl Halides with Diispropylaminob... more Stereospecific Palladium-Catalyzed Borylation Reaction of 1-Alkenyl Halides with Diispropylaminoborane. -(EUZENAT, L.; HORHANT, D.; BRIELLES, C.; ALCARAZ*, G.; VAULTIER, M.; J.

Research paper thumbnail of Copper nanoparticles and organometallic chemical liquid deposition (OMCLD) for substrate metallization

Journal of Materials Chemistry, 2008

Research paper thumbnail of X-ray Crystal Structure, ab Initio Calculations, and Reactivity of 1,3,2λ 5 -Diazaphosphetes:  A New Type of 4-π-Electron 4-Membered Heterocycle

Inorganic Chemistry, 1996

The structure of P,P-bis(diisopropylamino)-4-phenyl-1,3,2lambda(5)-diazaphosphete, 1a, has been d... more The structure of P,P-bis(diisopropylamino)-4-phenyl-1,3,2lambda(5)-diazaphosphete, 1a, has been determined by a single-crystal X-ray diffraction study (C(19)H(33)N(4)P, monoclinic system, space group P2(1), a = 9.482(1) Å, b = 11.374(3) Å, c = 9.668(2) Å, beta = 97.16(1) degrees, Z = 2). According to quantum chemical calculations at an RHF level of optimization utilizing the 6-31g(d,p) basis set, 1a has a zwitterionic structure with the negative charge delocalized on the NCN allylic fragment and the positive charge localized at the phosphorus. Heterocycle 1a reacts with water and benzaldehyde affording N-phosphoranylbenzamidine 3 (95% yield) and the expected aza-Wittig adduct 4 (85% yield), respectively. Addition of 1 equiv of methyl trifluoromethanesulfonate and of 2 equiv of BH(3).THF to 1a affords cyclic phosphonium salt 5 (94% yield) and the bis(borane) adduct 6a (90% yield), respectively. Dimethyl acetylenedicarboxylate slowly reacts with 1a giving rise to 1,3,4lambda(5)-diazaphosphinine, 9, in 70% yield. The X-ray crystal structures of products 2,3, and 6a are reported (2: C(26)H(38)N(5)P, monoclinic system, space group C2/c, a = 16.337(8) Å, b = 19.810(2) Å, c = 8.800(2) Å, beta = 117.68(2) degrees, Z = 4. 3: C(19)H(35)N(4)OP, orthorhombic system, space group P2(1)2(1)2(1), a = 9.090(1) Å, b = 12.955(2) Å, c = 17.860(3) Å, Z = 4. 6a: C(19)H(39)B(2)N(4)P, orthorhombic system, space group P2(1)2(1)2(1), a = 10.340(1) Å, b = 13.247(1) Å, c = 16.996(1) Å, Z = 4).

Research paper thumbnail of Synthesis of a ruthenium bis(diisopropylamino(isocyano)borane) complex from the activation of an amino(cyano)borane

Dalton Transactions, 2013

The reactivity of the amino(cyano)borane (i)Pr(2)NBH(CN) (2) towards [RuH(2)(η(2)-H(2))(2)(PCy(3)... more The reactivity of the amino(cyano)borane (i)Pr(2)NBH(CN) (2) towards [RuH(2)(η(2)-H(2))(2)(PCy(3))(2)] (3) was investigated. Our study reveals that the formation of the bis(isocyanoborane) ruthenium complex [RuH(CN)(CN-BHN(i)Pr(2))(2)(PCy(3))(2)] (6) occurs via the intermediacy of the bis(σ-B-H) ruthenium complex [RuH(CN)(H(2)BN(i)Pr(2))(PCy(3))(2)] (5). This transformation involves BCN linkage isomerisation in 2. The diisopropylaminoborane ligand in 5 can be displaced to ultimately produce the bis(σ-borane) complex [RuH(2)(η(2):η(2)-H(2)BN(i)Pr(2))(PCy(3))(2)] (4) as a by-product.

Research paper thumbnail of Dispirofluorene–Indenofluorene Derivatives as New Building Blocks for Blue Organic Electroluminescent Devices and Electroactive Polymers

Chemistry - A European Journal, 2007

Research paper thumbnail of Bonding mode of a new bis-phosphine-borane alkyl ligand to a Rh(i) species

Chemical Communications, 2009

The stoichiometric reaction of [Rh(COD)Cl](2) with the anion resulting from the deprotonation of ... more The stoichiometric reaction of [Rh(COD)Cl](2) with the anion resulting from the deprotonation of dppm(BH(3))(2) yielded a new alkyl Rh(I) complex; the coordination modes of the BH(3) groups are discussed on the basis of X-ray data, variable temperature multinuclear NMR experiments and DFT studies.

Research paper thumbnail of Improved transparency?nonlinearity trade-off with boroxine-based octupolar molecules

Chemical Communications, 2003

A series of octupolar molecules derived from the boroxine framework were designed and their optic... more A series of octupolar molecules derived from the boroxine framework were designed and their optical nonlinearities were investigated by performing harmonic light scattering experiments in solution; the molecules were found to combine excellent transparency in the near UV-visible region (lambdamax < or = 280 nm) and significant first-order hyperpolarisabilities (up to beta(0) = 56 x 10(-30) esu).

Research paper thumbnail of Organometallic control at the nanoscale: a new, one-pot method to decorate a magnetic nanoparticle surface with noble metal atoms

Chemical Communications, 2010

A novel cascade of reactions is designed to control in situ the deposition of noble metal islands... more A novel cascade of reactions is designed to control in situ the deposition of noble metal islands (e.g. Rh) on top of nanoparticles of a 3d metal (e.g. Fe, Co).

Research paper thumbnail of Monomeric (dialkylamino)boranes: a new and efficient boron source in palladium catalyzed C?B bond formation with aryl halides

Chemical Communications, 2003

Thermal decomposition of hindered amine-borane adducts leads in high yields to monomeric (dialkyl... more Thermal decomposition of hindered amine-borane adducts leads in high yields to monomeric (dialkylamino)boranes R1R2N-BH2 (R1 and R2 = alkyl) that are new and efficient boron-sources in the Pd0 catalyzed borylation reaction affording monomeric aryl(dialkylamino)boranes R1R2N-BHR3 (R3 = aryl).

Research paper thumbnail of A Highly Effective Ruthenium System for the Catalyzed Dehydrogenative Cyclization of Amine-Boranes to Cyclic Boranes under Mild Conditions

Chemistry (Weinheim an der Bergstrasse, Germany), Jan 7, 2015

We recently disclosed a new ruthenium-catalyzed dehydrogenative cyclization process (CDC) of diam... more We recently disclosed a new ruthenium-catalyzed dehydrogenative cyclization process (CDC) of diamine-monoboranes leading to cyclic diaminoboranes. In the present study, the CDC reaction has been successfully extended to a larger number of diamine-monoboranes (4-7) and to one amine-borane alcohol precursor (8). The corresponding NB(H)N- and NB(H)O-containing cyclic diaminoboranes (12-15) and oxazaborolidine (16) were obtained in good to high yields. Multiple substitution patterns on the starting amine-borane substrates were evaluated and the reaction was also performed with chiral substrates. Efforts have been spent to understand the mechanism of the ruthenium CDC process. In addition to a computational approach, a strategy enabling the kinetic discrimination on successive events of the catalytic process leading to the formation of the NB(H)N linkage was performed on the six-carbon chain diamine-monoborane 21 and completed with a (15) N NMR study. The long-life bis-σ-borane ruthenium...

Research paper thumbnail of NMR: A good tool to ascertain σ-silane or σ-borane formulations?

Coordination Chemistry Reviews, 2008

NMR has played a major role in the characterization of dihydrogen complexes and a number of polyh... more NMR has played a major role in the characterization of dihydrogen complexes and a number of polyhydrides have been reformulated as dihydrogen complexes on the basis of NMR data. If dihydrogen complexes remain the most widely studied class of σ-complexes, silane compounds are also well recognized as an important family of σ-complexes and more recently a few σ-borane compounds have

Research paper thumbnail of ChemInform Abstract: Coordination and Dehydrogenation of Amine-Boranes at Metal Centers

Research paper thumbnail of Mesitylborane as a bis(sigma-B-H) ligand: an unprecedented bonding mode to a metal center

Journal of the American Chemical Society, Jan 18, 2007

Research paper thumbnail of Synthesis and evolution of phosphanylcarbene?borane adducts

Journal of the Chemical Society, Chemical Communications, 1993

... Adducts Gilles Alcaraz, Robert Reed, Antoine Baceiredo and Guy Bertrand" Laboratoire... more ... Adducts Gilles Alcaraz, Robert Reed, Antoine Baceiredo and Guy Bertrand" Laboratoire de Chimie de Coordination du CNRS, 205, route de Narbonne, 31077 Toulouse Cedex, France ... go%).? Downloaded by google on 24 April 2011 ...

Research paper thumbnail of ChemInform Abstract: Bis σ-Bond Dihydrogen and Borane Ruthenium Complexes: Bonding Nature, Catalytic Applications, and Reversible Hydrogen Release

Research paper thumbnail of Ruthenium, Rhodium, and Iridium Bis(σ-B−H) Diisopropylaminoborane Complexes †

Organometallics, 2010

ABSTRACT The coordination chemistry of diisopropylaminoborane H2B−NiPr2 with valence isoelectroni... more ABSTRACT The coordination chemistry of diisopropylaminoborane H2B−NiPr2 with valence isoelectronic metal fragments to form, essentially isostructural, [MH2(η2:η2-H2B−NiPr2)(PCy3)2]n+ (M = Ru, n = 0; Rh and Ir, n = 1) has been explored by a combination of X-ray crystallography, NMR spectroscopy, and computational techniques. In the solid state and solution the aminoborane interacts with the metal centers through one four-center four-electron interaction, forming bis(σ-B−H) complexes. The structural data point to tighter interactions between both the Ru and Ir congeners compared to the Rh with significantly shorter M···B distances in the first two. These tighter interactions are mirrored in the spectroscopic data, with the Ru and Ir complexes showing more deshielded 11B chemical shifts and 1H M−H−B resonances that are more shielded than observed for the rhodium complex. Analysis of the bonding between metal and borane using the NBO approach is in very good agreement with the variations in the geometrical and spectroscopic parameters. There is overall a stronger interaction between the borane and the metal fragment for neutral Ru compared to cationic Rh, with cationic Ir in an intermediate situation.

Research paper thumbnail of Dispirofluorene-indenofluorene (DSFIF): Synthesis, Electrochemical, and Optical Properties of a Promising New Family of Luminescent Materials

Organic Letters, 2006

A series of new dispiro[fluorene-9′,6,9′′,12-indeno[1,2b]fluorenes] (DSFIFs) that combine indenof... more A series of new dispiro[fluorene-9′,6,9′′,12-indeno[1,2b]fluorenes] (DSFIFs) that combine indenofluorene (IF) and spirobifluorene (SBF) architectural specificities have been prepared. Their anodic oxidations lead to the formation of nonsoluble transparent polymers. The photophysical and electrochemical properties of these new molecules have been evaluated for further blue OLED applications.

Research paper thumbnail of A Terminal Borylene Ruthenium Complex: From B−H Activation to Reversible Hydrogen Release

Journal of the American Chemical Society, 2008

Starting from RuHCl(H2)(PCy3)2, a terminal ruthenium mesitylborylene complex was obtained via dou... more Starting from RuHCl(H2)(PCy3)2, a terminal ruthenium mesitylborylene complex was obtained via double B-H bond activation of mesitylborane and concomitant release of dihydrogen, such a process being remarkably reversible.

Research paper thumbnail of Mesitylborane as a Bis(σ-B−H) Ligand:  An Unprecedented Bonding Mode to a Metal Center

Journal of the American Chemical Society, 2007

... Gilles Alcaraz,* † Eric Clot,* ‡ Ulrike Helmstedt, ‡ Laure Vendier, † and Sylviane Sabo-Etien... more ... Gilles Alcaraz,* † Eric Clot,* ‡ Ulrike Helmstedt, ‡ Laure Vendier, † and Sylviane Sabo-Etienne* †. ... 13) Crestani, MG; Muñoz-Hernández, M.; Arévalo, A.; Acosta-Ramírez, A.; García, JJ J. Am. Chem. Soc.2005, 127, 18066−18073. ...

Research paper thumbnail of Tert-butylborane: A bis (σ-B–H) ligand in ruthenium hydride chemistry

Journal of Organometallic Chemistry, 2009

The reaction of tert-butylborane with the bis(dihydrogen) complex RuH2(η2-H2)2(PCy3)2 leads to th... more The reaction of tert-butylborane with the bis(dihydrogen) complex RuH2(η2-H2)2(PCy3)2 leads to the corresponding bis σ-borane complex which is the first example of a monoalkylborane ruthenium bis σ-complex. An alternative route involves the reaction of RuHCl(η2-H2)(PCy3)2 with lithium tert-butylborohydride.

Research paper thumbnail of Stereospecific palladium-catalyzed borylation reaction of 1-alkenyl halides with diispropylaminoborane

Journal of Organometallic Chemistry, 2005

Stereospecific Palladium-Catalyzed Borylation Reaction of 1-Alkenyl Halides with Diispropylaminob... more Stereospecific Palladium-Catalyzed Borylation Reaction of 1-Alkenyl Halides with Diispropylaminoborane. -(EUZENAT, L.; HORHANT, D.; BRIELLES, C.; ALCARAZ*, G.; VAULTIER, M.; J.

Research paper thumbnail of Copper nanoparticles and organometallic chemical liquid deposition (OMCLD) for substrate metallization

Journal of Materials Chemistry, 2008

Research paper thumbnail of X-ray Crystal Structure, ab Initio Calculations, and Reactivity of 1,3,2λ 5 -Diazaphosphetes:  A New Type of 4-π-Electron 4-Membered Heterocycle

Inorganic Chemistry, 1996

The structure of P,P-bis(diisopropylamino)-4-phenyl-1,3,2lambda(5)-diazaphosphete, 1a, has been d... more The structure of P,P-bis(diisopropylamino)-4-phenyl-1,3,2lambda(5)-diazaphosphete, 1a, has been determined by a single-crystal X-ray diffraction study (C(19)H(33)N(4)P, monoclinic system, space group P2(1), a = 9.482(1) Å, b = 11.374(3) Å, c = 9.668(2) Å, beta = 97.16(1) degrees, Z = 2). According to quantum chemical calculations at an RHF level of optimization utilizing the 6-31g(d,p) basis set, 1a has a zwitterionic structure with the negative charge delocalized on the NCN allylic fragment and the positive charge localized at the phosphorus. Heterocycle 1a reacts with water and benzaldehyde affording N-phosphoranylbenzamidine 3 (95% yield) and the expected aza-Wittig adduct 4 (85% yield), respectively. Addition of 1 equiv of methyl trifluoromethanesulfonate and of 2 equiv of BH(3).THF to 1a affords cyclic phosphonium salt 5 (94% yield) and the bis(borane) adduct 6a (90% yield), respectively. Dimethyl acetylenedicarboxylate slowly reacts with 1a giving rise to 1,3,4lambda(5)-diazaphosphinine, 9, in 70% yield. The X-ray crystal structures of products 2,3, and 6a are reported (2: C(26)H(38)N(5)P, monoclinic system, space group C2/c, a = 16.337(8) Å, b = 19.810(2) Å, c = 8.800(2) Å, beta = 117.68(2) degrees, Z = 4. 3: C(19)H(35)N(4)OP, orthorhombic system, space group P2(1)2(1)2(1), a = 9.090(1) Å, b = 12.955(2) Å, c = 17.860(3) Å, Z = 4. 6a: C(19)H(39)B(2)N(4)P, orthorhombic system, space group P2(1)2(1)2(1), a = 10.340(1) Å, b = 13.247(1) Å, c = 16.996(1) Å, Z = 4).

Research paper thumbnail of Synthesis of a ruthenium bis(diisopropylamino(isocyano)borane) complex from the activation of an amino(cyano)borane

Dalton Transactions, 2013

The reactivity of the amino(cyano)borane (i)Pr(2)NBH(CN) (2) towards [RuH(2)(η(2)-H(2))(2)(PCy(3)... more The reactivity of the amino(cyano)borane (i)Pr(2)NBH(CN) (2) towards [RuH(2)(η(2)-H(2))(2)(PCy(3))(2)] (3) was investigated. Our study reveals that the formation of the bis(isocyanoborane) ruthenium complex [RuH(CN)(CN-BHN(i)Pr(2))(2)(PCy(3))(2)] (6) occurs via the intermediacy of the bis(σ-B-H) ruthenium complex [RuH(CN)(H(2)BN(i)Pr(2))(PCy(3))(2)] (5). This transformation involves BCN linkage isomerisation in 2. The diisopropylaminoborane ligand in 5 can be displaced to ultimately produce the bis(σ-borane) complex [RuH(2)(η(2):η(2)-H(2)BN(i)Pr(2))(PCy(3))(2)] (4) as a by-product.

Research paper thumbnail of Dispirofluorene–Indenofluorene Derivatives as New Building Blocks for Blue Organic Electroluminescent Devices and Electroactive Polymers

Chemistry - A European Journal, 2007

Research paper thumbnail of Bonding mode of a new bis-phosphine-borane alkyl ligand to a Rh(i) species

Chemical Communications, 2009

The stoichiometric reaction of [Rh(COD)Cl](2) with the anion resulting from the deprotonation of ... more The stoichiometric reaction of [Rh(COD)Cl](2) with the anion resulting from the deprotonation of dppm(BH(3))(2) yielded a new alkyl Rh(I) complex; the coordination modes of the BH(3) groups are discussed on the basis of X-ray data, variable temperature multinuclear NMR experiments and DFT studies.

Research paper thumbnail of Improved transparency?nonlinearity trade-off with boroxine-based octupolar molecules

Chemical Communications, 2003

A series of octupolar molecules derived from the boroxine framework were designed and their optic... more A series of octupolar molecules derived from the boroxine framework were designed and their optical nonlinearities were investigated by performing harmonic light scattering experiments in solution; the molecules were found to combine excellent transparency in the near UV-visible region (lambdamax < or = 280 nm) and significant first-order hyperpolarisabilities (up to beta(0) = 56 x 10(-30) esu).

Research paper thumbnail of Organometallic control at the nanoscale: a new, one-pot method to decorate a magnetic nanoparticle surface with noble metal atoms

Chemical Communications, 2010

A novel cascade of reactions is designed to control in situ the deposition of noble metal islands... more A novel cascade of reactions is designed to control in situ the deposition of noble metal islands (e.g. Rh) on top of nanoparticles of a 3d metal (e.g. Fe, Co).

Research paper thumbnail of Monomeric (dialkylamino)boranes: a new and efficient boron source in palladium catalyzed C?B bond formation with aryl halides

Chemical Communications, 2003

Thermal decomposition of hindered amine-borane adducts leads in high yields to monomeric (dialkyl... more Thermal decomposition of hindered amine-borane adducts leads in high yields to monomeric (dialkylamino)boranes R1R2N-BH2 (R1 and R2 = alkyl) that are new and efficient boron-sources in the Pd0 catalyzed borylation reaction affording monomeric aryl(dialkylamino)boranes R1R2N-BHR3 (R3 = aryl).