Visualitzant QUIO_Articles per títol
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Radical Mechanism in the Elimination of 2-Arylsulfinyl Esters
American Chemical Society (2012-05)The mechanism of the dehydrosulfenylation of 2-arylsulfinyl esters was investigated. The reaction was found to follow a homolytic cleavage mechanism as verified by electrospray ionization tandem mass spectrometry and ... -
Ratiometric fluorescence sensing of phenylalanine derivatives by synthetic macrocyclic receptors
Elsevier (2010)The supramolecular analytical behavior of eight pseudopeptidic fluorescent receptors (1a-c, 2a-c, 3, 4) has been studied. The receptors are either macrocyclic or open chain derivatives based on the naphthalene chromophore. ... -
Rational design of a supramolecular gel based on a Zn(II)–salophen bis-dipeptide derivative
Royal Society of Chemistry (2016)We report the rational design and synthesis of a supramolecular gelator based on a Zn(II)–salophen derivative functionalized with L-valine residues. This compound is able to gelate acetonitrile by self-assembly into helical ... -
Rational Design of Heat-Set and Specific-Ion-Responsive Supramolecular Hydrogels Based on the Hofmeister Effect
WILEY-VCH Verlag GmbH & Co. KGaA (2014-10)Smart supramolecular hydrogels have been prepared from a bolaamphiphilic l-valine derivative in aqueous solutions of different salts. The hydrogels respond selectively to different ions and are either reinforced or weakened. ... -
Rational Design of Simple Organocatalysts for the HSiCl3 Enantioselective Reduction of (E)-N-(1-Phenylethylidene)aniline
MDPI (2021-11-18)Prolinamides are well-known organocatalysts for the HSiCl3 reduction of imines; however, custom design of catalysts is based on trial-and-error experiments. In this work, we have used a combination of computational ... -
Re-programming Hydrogel Properties Using a Fuel-Driven Reaction Cycle
American Chemical Society (2020-03-04)Nature uses catalysis as an indispensable tool to control assembly and reaction cycles in vital non-equilibrium supramolecular processes. For instance, enzymatic methionine oxidation regulates actin (dis-)assembly, and ... -
Recent developments in the applications of palladium complexes bearing N-heterocyclic carbene ligands
Bentham Science Publishers (2011-01-09)N-heterocyclic carbene (NHC) ligands have become ubiquitous ligands in the preparation of metal complexes with new catalytic applications. Mainly due to their applications in C-C bond formation reactions, a plethora of ... -
Recognition of Free Tryptophan in Water by Synthetic Pseudopeptides: Fluorescence and Thermodynamic Studies
WILEY-VCH Verlag GmbH & Co. KGaA (2014-06)Pseudopeptidic receptors containing an acridine unit have been prepared and their fluorescence response to a series of amino acids was measured in water. Free amino acids, not protected either at the C or the N terminus, ... -
Recycling of Cr/Ni/Cu plating wastes as black ceramic pigments
Elsevier (2018)The non-ferrous metal industry, such as Cr/Ni/Cu plating, produces acid sludge which is usually neutralized with lime slurry in batch processes, and the resulting waste is dewatered by vacuum filtration or filter-pressing. ... -
Red ceramic pigments of terbium-doped ceria prepared through classical and non-conventional coprecipitation routes
Elsevier (2010)Reddish ceramic pigments based on cerianite compositions Ce1−xTbxO2 (x = 0.1, 0.2 and 0.3) and Ce0.9Tb0.05Y0.05O2 have been prepared. Firstly, the optimal composition giving the best red colour was selected (Ce0.9Tb0.1O2) ... -
Red-brown ceramic pigments based on chromium doped ferrian armalcolite, effect of mineralizers
Elsevier (2017)A new red-brown ceramic pigment based on chromium-doped ferrian armalcolite have been synthesized and characterized. (MgFe)(CrxTi3−xFe)O10 powders (x=0–0.3) fired at 1200 °C crystallize ferrian armalcolite as the only ... -
Reduction-Responsive Cationic Vesicles from Bolaamphiphiles with Ionizable Amino Acid or Dipeptide Polar Heads
ACS Publications (2023)This paper presents a study of the aggregation of cationic bolaamphiphilic molecules into vesicles. These molecules are based on a cystamine core with protonated terminal dipeptide groups. The study found that vesicles ... -
Reduction-triggered Disassembly of Organic Cationic Nanorods Produces a Cysteine Protease Mimic (Miravet et al.)
Wiley (2023)The emergence of catalytic activity associated with a disassembly process is reported, reminiscent of complex biological systems. A cystine derivative with pendant imidazole groups self-assembles into cationic nanorods ... -
Regioselective Opening of Nitroepoxides with Unsymmetrical Diamines
American Chemical Society (2018-01)Nitroepoxides are easily transformed into benzodiazepines, tetrahydrobenzodiazepines, imidazopyridines, and N-alkyl tetrahydroquinoxalines by treatment with 2-aminobenzylamines, 2-aminopyridines, and N-alkyl 1,2-diaminobenzenes, ... -
Regioselective ring opening and isomerization reactions of 3,4-epoxyesters catalyzed by boron trifluoride
American Chemical Society (2011)Efficient ring opening of 3,4-epoxyesters with alcohols to produce 4-alkoxy-3-hydroxyesters and their isomerization into 4-ketoesters using boron trifluoride as the catalyst are presented. Both transformations are simple ... -
Remarkable increase in basicity associated with supramolecular gelation
Royal Society of Chemistry (2009)L-Proline derivatives which are able to form supramolecular gels show an amazing basicity increase in the aggregated (gel) state as compared to solution. As a result they behave as enantioselective catalysts for the aldol ... -
Residence time distribution, a simple tool to understand the behaviour of polymeric mini-flow reactors
Royal Society of Chemistry (2012-09)A simple method for the determination of the residence time distribution (RTD) of different polymer-based mini-flow reactors has been developed. The flow patterns have been adjusted employing the axial dispersion model, ... -
Review on Magnetism in Catalysis: From Theory to PEMFC Applications of 3d Metal Pt-Based Alloys
MDPI (2022-11-22)The relationship between magnetism and catalysis has been an important topic since the mid-20th century. At present time, the scientific community is well aware that a full comprehension of this relationship is required ... -
Rhodium and Iridium Complexes with Chelating C–C′-Imidazolylidene–Pyridylidene Ligands: Systematic Approach to Normal, Abnormal, and Remote Coordination Modes
American Chemical Society (2012)A series of linked imidazolium−pyridinium salts ([Him-pyH](X)2 ) have been used as imidazolylidene− pyridylidene ligand precursors for the preparation of rhodium- (III) and iridium(III) complexes. The relative configuration ... -
Rhodium, iridium and nickel complexes with a 1,3,5-triphenylbenzene tris-MIC ligand. Study of the electronic properties and catalytic activities
Beilstein-Institut (2015-12-14)The coordination versatility of a 1,3,5-triphenylbenzene-tris-mesoionic carbene ligand is illustrated by the preparation of complexes with three different metals: rhodium, iridium and nickel. The rhodium and iridium complexes ...