A5008620890- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Asymmetric Hydrogenation and Catalysis
- Nanomaterials for catalytic reactions
- Ionic liquids properties and applications
- Nanocluster Synthesis and Applications
- Cyclopropane Reaction Mechanisms
- Synthesis and Catalytic Reactions
- Catalysis for Biomass Conversion
- Click Chemistry and Applications
- Catalytic Cross-Coupling Reactions
- Glass properties and applications
- Organic and Molecular Conductors Research
- Carbon dioxide utilization in catalysis
- Luminescence Properties of Advanced Materials
- Polyoxometalates: Synthesis and Applications
- Magnetism in coordination complexes
- Surface Chemistry and Catalysis
- Organic Chemistry Cycloaddition Reactions
- Inorganic Fluorides and Related Compounds
- Sulfur-Based Synthesis Techniques
- CO2 Reduction Techniques and Catalysts
- Metal complexes synthesis and properties
- Crystallography and molecular interactions
- Solid-state spectroscopy and crystallography
Universidad Complutense de Madrid
2022-2025
Universidad de Cantabria
2019-2023
Universidad de Sevilla
2004-2021
University of Nottingham
2017-2021
Laboratoire de Physique et Chimie des Nano-Objets
2016-2017
Université Toulouse III - Paul Sabatier
2016-2017
Centre National de la Recherche Scientifique
2016-2017
Hôpital Rangueil
2017
Université de Toulouse
2016
Institut Català d'Investigació Química
2014-2015
The reaction of 1-alkynes with acyl azides in the presence [Tpm(*,Br)Cu(NCMe)]BF(4) [Tpm(*,Br) = tris(3,5-dimethyl-4-bromopyrazolyl)methane] as catalyst provides 2,5-oxazoles moderate to high yields. This is a novel transformation CuAAC type that constitutes significant variation commonly observed [3 + 2] cycloaddition yield 1,2,3-triazoles.
The synthesis of air-stable and homogeneous gold nanoparticles (AuNPs) employing tert-butyl(naphthalen-1-yl)phosphine oxide as supporting ligand is described via NaBH4 reduction a Au(I) precursor, [(tert-butyl(naphthalen-1-yl)phosphine oxide)AuCl]2. This highly reproducible simple procedure furnishes small (1.24 ± 0.16 nm), soluble that are found to be active catalysts for the hydrogenation substituted aldehydes, giving high conversions chemoselectivities wide variety substrates. In addition...
Air-stable and homogeneous gold nanoparticles (AuNPs, 1a-5a) ligated by various secondary phosphine oxides (SPOs), [R(1)R(2)P(O)H] (R(1) = Naph, R(2) (t)Bu, L1; R(1) Ph, L2; L3; Et, L4; Cy, L5; L6), with different electronic steric properties were synthesized via NaBH4 reduction of the corresponding Au(I)-SPO complex. These easily accessible ligands allow formation well dispersed small (size 1.2-2.2 nm), which characterized use a wide variety techniques, such as transmission electron...
Secondary phosphine oxides (SPOs) can be used as ligands to stabilize catalytically active gold nanoparticles (AuNPs). These materials are and very selective in the chemoselective hydrogenation of acrolein other α,β-unsaturated aldehydes, but origin activity remains elusive. Here, by means density functional theory, we identify a cooperative effect at AuNP–SPO interface that enables heterolytic cleavage H2 molecule its kinetically favorable concerted addition C═O bond (in transfer...
Abstract Metal complexes of secondary phosphine oxides (SPOs) were introduced as homogeneous catalysts in the 1980s for hydroformylation and hydrogenation with platinum metal. As neutral species, ligand properties resemble those corresponding tertiary phosphines was shown coordination chemistry developed 1970s, but participation OH bonding reaction mechanisms provides them a peculiar additional function. While this already proposed recognized first publications, it took while before found...
Pt NPs covered with zwitterionic amidinates as ligands exhibit an exciting ligand effect in the hydrogenation of carbonyl groups when electron donor/acceptor are introduced the<italic>N</italic>-substituents.
Tailoring halometallate-based ionic liquids (bulkiness and polarization) to be more active catalysts for PET glycolysis under conventional microwave-assisted heating conditions.
Abstract Well‐defined copper(I) complexes of composition [Tpm* ,Br Cu(NCMe)]BF 4 (Tpm* =tris(3,5‐dimethyl‐4‐bromo‐pyrazolyl)methane) or [Tpa * Cu]PF 6 (Tpa =tris(3,5‐dimethyl‐pyrazolylmethyl)amine) catalyze the formation 2,5‐disubstituted oxazoles from carbonyl azides and terminal alkynes in a direct manner. This process represents novel procedure for synthesis this valuable heterocycle readily available starting materials, leading exclusively to 2,5‐isomer, attesting completely...
Chiral iridium nanoparticles (<bold>IrNPs</bold>) were synthesized by H<sub>2</sub>reduction of (1,5-cyclooctadiene)(methoxy)iridium(<sc>i</sc>) dimer ([Ir(OMe)(COD)]<sub>2</sub>) in the presence an asymmetric secondary phosphine oxide.
Abstract Soluble platinum nanoparticles (Pt NPs) ligated by two different long‐chain N‐heterocyclic carbenes (LC‐IPr and LC‐IMe) were synthesized fully characterized TEM, high‐resolution wide‐angle X‐ray scattering (WAXS), photoelectron spectroscopy (XPS), solution NMR. The surface chemistry of these NPs (Pt@LC‐IPr Pt@LC‐IMe) was investigated FT‐IR solid state NMR using CO as a probe molecule. A clear influence the bulkiness N‐substituents on size, state, catalytic activity Pt observed....
An oxalate-bridged binuclear iron(III) ionic liquid combined with an imidazolium based cation, (dimim)2 [Fe2 Cl4 (μ-ox)], was synthesized and characterized by a wide range of techniques. This halometallate active in catalyzing the depolymerization polyethylene terephthalate (PET) glycolysis, under conventional microwave-assisted heating conditions. Both methodologies were very selective towards production bis(2-hydroxyethyl)terephthalate (BHET). The employment microwave proved beneficial...
Considering CO2 as an alternative and sustainable resource, rather than a waste to be treated, this work proposes the combination of doped TiO2 nanocrystals with optofluidics for continuous photoreduction alcohols under ultraviolet visible light. This approach aims at overcoming one major limitations technology, namely, current photoreactor configurations low activity light up-to-date photocatalysts. Ce-doped Cu–Ce-codoped nanocrystals, synthesized by simple green hydrothermal method...
The well-defined complex [Tpm(*,Br)Cu(NCMe)]BF(4) efficiently catalyses the [3+2] cycloaddition between alkynes and N-sulfonylazides under mild conditions, with conversions comparable to others obtained in situ generated catalytic systems previously described for this transformation.
Supports, ligands and additives can promote heterolytic H<sub>2</sub>splitting by a cooperative mechanism with metal nanoparticles.
In this study, we demonstrate that the combination of seed-mediated growth routes with pulsed laser irradiation produces high-quality colloidal AuPdPt alloy nanocrystals featuring spherical shapes, tunable compositions, and defined numbers atoms.
Abstract Invited for the cover of this issue is group Piet W. N. M. van Leeuwen at Institute Chemical Research Catalonia (ICIQ), Tarragona, Spain. The was designed by Miguel and sun represents photoactivity complex, resulting in production hydrogen. Read full text article 10.1002/chem.201404763 .
Pr3+-doped Y2O3 nanocrystals (NCs) have been obtained via five wet-chemistry synthesis methods which were optimized in order to achieve superior optical properties. To this end, a systematic study on the influence of different reaction parameters was performed for each procedure. Specifically, precursor concentration, temperature, calcination and time, among others, analyzed. The synthesized Y2O3: Pr3+ NCs characterized by differential scanning calorimetry (DSC), thermogravimetric analysis...
Sulfur tyranny: Thiiranes, instead of oxiranes, can be obtained in a highly stereoselective manner through the cycloaddition reaction N-acyl oxazolidine tethered diazo thione compounds with aldehydes catalyzed by RhII. Thus, this provides versatile adducts S functionalized at both α and β position, concomitant generation two contiguous stereocenters. Detailed facts importance to specialist readers are published as "Supporting Information". Such documents peer-reviewed, but not copy-edited or...
Abstract Using a magnetron sputtering approach that allows size-controlled formation of nanoclusters, we have created palladium nanoclusters combine the features both heterogeneous and homogeneous catalysts. Here report atomic structures electronic environments series metal in ionic liquids at different stages formation, leading to discovery Pd with core ca . 2 nm surrounded by diffuse dynamic shell atoms [C 4 C 1 Im][NTf ]. Comparison catalytic activity alkene cyclopropanation reveals...
A specific secondary phosphine oxide (SPO) ligand (tert-butyl(phenyl)phosphine oxide) was employed to generate two iridium catalysts, an Ir-SPO complex and IrNPs (iridium nanoparticles) ligated with SPO ligands, which were compared mutually several supported catalysts the aim establish differences in their catalytic properties. The Ir-SPO-based showed totally different activities selectivities hydrogenation of various substituted aldehydes, H2 is likely cleaved by a metal-ligand cooperation,...
The coordination mode of secondary phosphine oxide ligands on the surface iridium nanoparticle catalysts was elucidated by solid-state NMR.