A5039835792- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Metal-Organic Frameworks: Synthesis and Applications
- Asymmetric Hydrogenation and Catalysis
- Covalent Organic Framework Applications
- Chemical Synthesis and Reactions
- Polyoxometalates: Synthesis and Applications
- Pregnancy and preeclampsia studies
- Mesoporous Materials and Catalysis
- Birth, Development, and Health
- Catalytic Cross-Coupling Reactions
- Chemical Synthesis and Characterization
- Organometallic Complex Synthesis and Catalysis
- Crystallography and molecular interactions
- Carbon dioxide utilization in catalysis
- Nanomaterials for catalytic reactions
- Catalytic Processes in Materials Science
- Magnetism in coordination complexes
- Inflammatory Bowel Disease
- Microscopic Colitis
- Catalytic Alkyne Reactions
- Catalysis and Hydrodesulfurization Studies
- Surface Chemistry and Catalysis
- Catalysis for Biomass Conversion
- Cyclopropane Reaction Mechanisms
Instituto de Ciencia de Materiales de Madrid
2016-2025
Consejo Superior de Investigaciones Científicas
2013-2025
University Hospital Complex Of Vigo
1998-2025
Johnson University
2025
Rutgers, The State University of New Jersey
2025
Instituto Tecnológico de Aragón
2009-2024
Universidad Nacional de Colombia
2024
Universidad de Extremadura
2024
Deleted Institution
2023
National University of Patagonia San Juan Bosco
2023
Zero, one, or three? The role of Au0, AuI, and AuIII cations in the heterogeneous gold catalyst Au/CeO2 was investigated with copper-free Sonogashira cross-coupling reaction iodobenzene phenyl acetylene (see picture). Reactions carried out under both homogeneous conditions using distinct species reveal that AuI is active for reaction.
The new hybrid inorganic-organic polymer In(2)(OH)(3)[O(4)C(8)H(4)](1.5) has been hydrothermally obtained. Conditions for the synthesis are reported. crystal structure of this material established by single-crystal X-ray diffraction: it is monoclinic, with space group P2(1)/c (Nomicron. 14), a = 6.772(1) A, b 10.329(2) c 20.152(3) beta 97.573(3) degrees. In atoms octahedrally coordinated three hydroxide groups and different molecules carboxylate ligand. resulting polymeric 3D can be...
The combined advantages of layered double-hydroxide catalysts and rare-earth compounds are found in the hydroxides [R4(OH)10(H2O)4]nAn (R=Y, Dy, Ho, Yb; A=organic anion). These crystalline materials (see structure) comprise rigid organic anions (balls sticks) intercalated between inorganic layers (polyhedra). They selective heterogeneous for hydrodesulfurization sulfide oxidation.
Four novel metal-organic frameworks (MOFs) [In(BDC)1.5(bipy)] (1), [In2(OH)2(BDC)2(phen)2] (2), [In(BTC)(H2O)(bipy)] (3), and [In(BTC)(H2O)(phen)] (4) (BDC = 1,4-benzendicarboxylic acid, BTC 1,3,5-benzenetricarboxylic bipy 2,2'-bipyridyl, phen o-phenantroline) were synthesized their structures determined by X-ray single-crystal diffraction. Structurally speaking we can conclude that while the metal/connector/chelate rate is 1:1:1, introduction of a chelate ligand, such as or phen, blocks...
By using the bent linker 4,4′-(hexafluoroisopropylidene)bis(benzoic acid) (H2hippb), whose central atom is an sp3 carbon, a new In(III) MOF has been obtained. The structure described as thick layers with geometry of ligand leading to formation square-shaped channels, which run inside framework layers. This microporous, thermally stable compound proved be efficient heterogeneous catalyst for acetalization aldehydes. Differences in catalytic activity when empty or filled channels used...
By a combination of kinetic and theoretical studies it is concluded that gold intrinsically active to perform the Sonogashira coupling reaction between phenylacetylene iodobenzene. The presence Pd impurities not mandatory for catalyst activity.
Au(III)−Schiff base complexes are active hydrogenation catalysts, giving turnover frequencies similar to those of the corresponding Pd(II), which has same d8 electronic structure as Au(III). The mechanism reaction been studied in detail by a combination kinetic experiments and theoretical calculations. It is predicted tested that nature solvent plays critical role for heterolytic cleavage H2 (controlling step). Taking this into account, properly selecting solid supports (polarity...
A series of gold complexes were tested as catalysts in the synthesis propargylamines by three component coupling reaction amines, aldehydes, and alkynes. These are efficient for three-component (yields up to 97%). In homogeneous solution, conversions respective propargylamine higher than under heterogeneous conditions. Heterogenized stable recoverable at least six cycles. Ligands, gold(I) or gold(III), heterogenized systems have pronounced effects on catalytic activity corresponding complexes.
Abstract Mononuclear unsymmetrical N‐heterocyclic carbene‐gold complexes and the corresponding solid catalysts in which a gold‐carbene complex has been immobilized on silica gel, ordered mesoporous (MCM‐41), delaminated zeolite (ITQ‐2) have prepared. These new tested hydrogenation of alkenes Suzuki cross‐coupling reaction to afford selectively non‐symmetrical biaryls. reactions were studied with soluble as well heterogenized counterpart catalysts. The high accessibility introduced by...
Here we report the design and synthesis of a new conjugated microporous polymer based on BODIPY dye (CMPBDP) which has shown excellent luminescence properties an efficient heterogeneous photocatalytic activity. CMPBDP shows high thermal stability surface area with size efficiently catalyzes selective oxidation thioanisole into corresponding sulfoxide via singlet oxygen under visible light (up to 500 nm). The rate materials is 4-fold faster that soluble (used as reference) same reaction...
Worth their weight in gold: Au/CeO2 nanoparticles are a highly active catalyst for the hydrosilylation of large variety unsaturated compounds with high chemo- and regioselectivity. To understand nature catalytic sites, AuI AuIII phosphine-free stable organogold complexes supported counterparts were prepared relative activity towards was elucidated. Supporting information this article is available on WWW under http://www.wiley-vch.de/contents/jc_2002/2007/z702032_s.pdf or from author. Please...
A new family of rare-earth polymeric framework RPF-4 has been obtained and its structure solved from an intrinsically triple twinned crystal. The formed by a H−O bond free matrix, with the Ln atoms separated in two directions, makes them very promising materials for light-emitting diodes. properties as heterogeneous catalysts are reported, too. IR spectroscopy suggests presence peroxo complex that acts active species oxidation reaction.
The aim of this research is to establish how metal-organic frameworks (MOFs) composed more than one metal in equivalent crystallographic sites (solid solution MOFs) exhibit catalytic activity, which tunable by virtue the ions ratio. New MOFs with general formula [InxGa1-x(O2C2H4)0.5(hfipbb)] were prepared combination Ga and In. They are isostructural their monometal counterparts, synthesized Al, Ga, Differences behavior as heterogeneous catalysts three-component, pot Strecker reaction...
By adjusting the solvothermal synthesis conditions, two ytterbium catalytically active MOF (metal organic framework) materials aimed at different heterogeneous processes have been obtained as pure phases. Yb-LRH belongs to first family of layered rare-earth hydroxides (LRH). With a 2D structure, highly related that doubles hydroxides, Yb-LRHs cationic inorganic layers with formula [Yb4(OH)10(H2O)4]n2+ and is very selective catalyst in sulfide oxidation reaction. The second, Yb-RPF-5, 3D...
We described the use of one porous polymeric aromatic framework (PPAF) with a 9,9′-spiro-bisfluorene unit as support in heterogeneous catalysis. The material was functionalized acid and base active sites used bifunctional catalyst model cascade reaction. This recycled up to eight times only small loss activity.
With the aim of developing new highly porous, heterogeneous Lewis acid catalysts for multicomponent reactions, a mesoporous metal-organic framework, InPF-110 ([In3O(btb)2(HCOO)(L)], (H3btb = 1,3,5-tris(4-carboxyphenyl)benzene acid, L methanol, water, or ethanol), has been prepared with indium as metal center. It exhibits Langmuir surface area 1470 m(2) g(-1), and its structure consists hexagonal pores 2.8 nm aperture, which allows diffusion multiple substrates. This material presents large...
Abstract Four donor‐acceptor (D‐A) polymers are synthesized by combining two different electron donors (truxene and its more rich triaza analogue, triindole) with an electron‐deficient monomer (benzothiadiazole) through positions (2,7,13 or 3,8,13) their optoelectronic properties studied theoretical experimental methods. One of the exhibits remarkable sensing capabilities for explosive nitraoaromatics while another demonstrated efficient photocatalytic activity in aerobic sulfoxidation...
Abstract —With the aim to describe daily pattern of blood pressure during trimesters pregnancy in clinically healthy women as well pregnant who developed gestational hypertension or preeclampsia, we analyzed 1494 series systematically sampled by ambulatory monitoring for 48 hours every 4 weeks after first obstetric visit 124 with uncomplicated pregnancies, 55 hypertension, and 23 a final diagnosis preeclampsia. The circadian variation each group trimester gestation was established population...
The 3D polymeric terephthalate of scandium has been synthesized and its structure solved by single-crystal XRD. It was obtained as a single phase characterized tested hydrogen nitrogen adsorbent heterogeneous catalyst redox agent in the oxidation sulfides. compound shows BET area 721 m2 g-1 with high CBET = 7000. chemical thermal stability excellent sorption properties make this useful material for storage.
Eight 2D and 3D metal-organic framework (MOF) rare earth naphthalenedisulfonates have been obtained. The different geometry of the naphthalenedisulfonic acids used as connectors [(1,5-NDS) (2,6-NDS)] gives rise to three new structure types. In Ln(OH)(1,5-NDS)H2O, LnPF-1 (lanthanide polymeric framework; Ln=La, Nd, Pr, Sm Eu), lanthanide ion is octacoordinated. Its formed by (Ln2O14)-S-(Ln2O14) infinite chains, connected through complete NDS connectors. LnPF-2 (Ln=Nd), with same empirical...