Félix Sánchez - Academia.edu (original) (raw)

Papers by Félix Sánchez

An entry from the Cambridge Structural Database, the world's repository for small molecule cr... more An entry from the Cambridge Structural Database, the world's repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.

New stable chiral [RuHClCO((NHC)NN)] and [RuCl 2 (p-cymene)((NHC)NN)] pincer complexes with a pen... more New stable chiral [RuHClCO((NHC)NN)] and [RuCl 2 (p-cymene)((NHC)NN)] pincer complexes with a pendant silyloxy group ((NHC)NN: (S)-1-((6-((3-aryl-2,3-dihydro-1H-imidazol-1-yl)methyl)pyridin-2-yl)methyl); R-N-(3-(triethoxysilyl)propyl)pyrrolidine-2-carboxamide, aryl = mesityl, 2,6-diisopropylphenyl; R = Me, Ph) were synthesized and grafted onto a mesoporous silica MCM-41 through the siloxane linkage, and the resulting supported ruthenium catalysts were highly active and recyclable catalysts for the asymmetric hydrogenation of alkenes and cyclopropanation of styrenes. The solid catalysts were characterized with a variety of methods including solid state cross-polarization magic-angle spinning (CP MAS) 13 C NMR, FT-IR, and elemental analysis. Excellent activity and enantioselectivity was observed for these supported Ru-catalysts owing to readily accessible and uniform catalytic sites within the large channels of MCM-41 and short diffusion lengths for the organic compounds. The high acc...

Solar RRL, 2021

Two new covalent triazines frameworks (CTFs) containing phenyl extended naphthalene units (with a... more Two new covalent triazines frameworks (CTFs) containing phenyl extended naphthalene units (with and without methoxy groups in the naphthalene core) are prepared by thermal and microwave activation. Both procedures yield similar chemical structure combining triazine acceptor units with donor aromatic groups, but they generate some differences in the morphology, structural organization, CO2 adsorption capacity, thermal and optical properties. Besides, the methoxy groups of the naphthalene core have also influence in some of these properties. The resulting phenyl extended naphthalene CTFs were efficiently utilized as metalfree heterogeneous photocatalyst for the selective aerobic oxidation of sulfides and the dehydrogenative cross-coupling reactions under visible-light irradiation, showing a high chemical stability. Phenyl extended naphthalene based-covalent triazine frameworks (PhN-CTFs) results in effective heterogeneous photocatalysts for the metal-free selective aerobic oxidation of sulfides to sulfoxides and the cross-dehydrogenative CC coupling reaction under visible-blue light irradiation. The PhN-CTFs also exhibited good substrates applicability for both reactions as well as excellent chemical stability.

Journal of Materials Chemistry A, 2016

A deprotection strategy of BODIPY conjugated porous polymers (CMPBDP) has been applied to synthes... more A deprotection strategy of BODIPY conjugated porous polymers (CMPBDP) has been applied to synthesize a new (dipyrrin)(bipyridine)Ru(ii) (CMPBDP-Ru) efficient heterogeneous photocatalyst for iminium ion generation under visible light.

Microporous and Mesoporous Materials, 2016

Studies in surface science and catalysis

Microporous crystalline zincophosphates with chiral structure CZP have been synthesized from gels... more Microporous crystalline zincophosphates with chiral structure CZP have been synthesized from gels containing chiral alcohols. These materials have been characterized by different physicochemical methods and tested in base catalyzed reactions such as the Knoevenagel condensation and the Michael addition.

Studies in Surface Science and Catalysis, 1994

Publisher Summary The new policies on environment preservation are directing the chemical process... more Publisher Summary The new policies on environment preservation are directing the chemical processes to not only avoid the use of unfriendly reactants and catalysts but also to find more selective catalysts that minimize product waste and/or expensive separations and recycling. Zeolites doped with V and Zn can selectively oxidize n-butane to maleic anhydride. Pd/Cu–Y zeolites can replace the homogeneous Pd and Cu salts for the oxidation of short-chain olefins to carbonyl compounds using molecular oxygen. Metal phthalocyanine complexes entrapped in zeolites have also shown great activity and selectivity for the oxidation of alkanes, cycloalkanes, olefins, and alcohols using iodosobenzene and air as oxidants. An important advance in oxidation catalyst was given when Ti and V containing zeolites were shown to be active and selective to carry out the oxidation of different hydrocarbons with H 2 O 2 . Thus, the isomorphous substitution of Si by Ti and/or V into the framework of MFI and MEL zeolite structures leads to materials that show good activity and selectivity for the oxidation of phenol to catechol and hydroquinone, olefins to epoxides, and alkanes to alcohol and ketones using H 2 O 2 at relatively low temperatures. However, in the field of fine chemicals, it is sometimes required to oxidize large molecules that cannot penetrate in the narrow pores of the MFI structure.

Green Chem., 2014

The multifunctional heterogeneous catalyst iridium–Zr-based MOF effectively catalyzes the hydroge... more The multifunctional heterogeneous catalyst iridium–Zr-based MOF effectively catalyzes the hydrogenation of aromatic compounds in high yields under mild conditions.

Physical Chemistry Chemical Physics, 2017

Microporous and Mesoporous Materials, 2017

European Polymer Journal, 2017

Catalysis Science & Technology, 2016

Polymeric aromatic frameworks (PAFs), easily obtained from organic platforms, as excellent suppor... more Polymeric aromatic frameworks (PAFs), easily obtained from organic platforms, as excellent supports to yield robust well-defined organometallic heterogenized catalysts.

Chiral Reactions in Heterogeneous Catalysis, 1995

Chiral dioxo acetylacetonate Mo(VI)-complexes were synthesized by reactions of MoO2(acac)2 with a... more Chiral dioxo acetylacetonate Mo(VI)-complexes were synthesized by reactions of MoO2(acac)2 with a series of ligands derived from proline and 4-hydroxyproline. The structures of these complexes were elucidated by analytical and spectroscopic measurements. The complexes with Si(OEt)3 groups were anchored to modified USY zeolite and their catalytic activities tested in epoxidation reactions of alkenes with TBHP, as oxygen source. The heterogenized catalysts have shown a significant rate enhancing and a shape selectivity when compared with the corresponding homogeneous complexes.

Journal of Organometallic Chemistry, 2002

The fixation of the preformed rhodium and copper complexes, {[Rh(N,N′-bis[(S)-prolyl-N-(2-aminoet... more The fixation of the preformed rhodium and copper complexes, {[Rh(N,N′-bis[(S)-prolyl-N-(2-aminoethyl-3-aminopropyl)triethoxysilyl]ethylenediamine)(THF)]X, [Rh((N,N′-bis[(S)-benzyl prolyl]-N-(2-aminoethyl-3-aminopropyl)triethoxysilylethylenediamine)(cod)]X, X=PF6}, {[Cu(N,N′-bis[(S)-prolyl-N-(2-aminoethyl-3-aminopropyl)triethoxysilyl]ethylenediamine)]X, [Cu((N,N′-bis[(S)-benzylprolyl]-N-(2-aminoethyl-3-aminopropyl)triethoxysilylethylenediamine)(CH3CN)]X, X=ClO4} on zeolites (USY, MCM41) and their use, under heterogeneous conditions, for the hydrogenation and cyclopropanation reactions are reported. The catalytic activity and selectivity are higher to that observed under homogeneous conditions, as a consequence of the complex—and/or reagents—to-support interaction. The strength of such interactions

Journal of Organometallic Chemistry, 1999

New diphosphinite ligands derived from (2S,4R), (2S,4S)-1-benzyl-4-hydroxy-4-phenyl-2-(1,1-diphen... more New diphosphinite ligands derived from (2S,4R), (2S,4S)-1-benzyl-4-hydroxy-4-phenyl-2-(1,1-diphenylmethyl)pyrrolidinylmethanol and (2S,4R), (2S,4S)-1-(3-triethoxysilyl)propylaminocarbonyl-4-hydroxy-4-phenyl-2-(1,1-diphenylmethyl)pyrrolidi nylmethanol have been prepared in high yields (60–80%) and reacted with [RhCl(cod)]2 to yield cationic [Rh(diphosphinite)(cod)]+ complexes. Those metal complexes bearing a triethoxysilyl group were covalently bonded to USY-zeolite by controlled hydrolysis and Rh-heterogenised complexes were obtained. A comparative study (homogeneous versus supported) for the catalytic activity and selectivity in