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25 results on '"Friggeri, A."'

2. Unlocking the Stability of Reduced Graphene Oxide Nanosheets in Biological Media via Use of Sodium Ascorbate

Author

Amato, Francesco, primary, Perini, Giordano, additional, Friggeri, Ginevra, additional, Augello, Alberto, additional, Motta, Alessandro, additional, Giaccari, Leonardo, additional, Zanoni, Robertino, additional, De Spirito, Marco, additional, Palmieri, Valentina, additional, Marrani, Andrea Giacomo, additional, and Papi, Massimiliano, additional

Published
2023
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4. Efficient Synthesis of 3,5-Dicarbamoyl-1,4-dihydropyridines from Pyridinium Salts: Key Molecules in Understanding NAD(P)+/NAD(P)H Pathways

Author

Barbara Di Rienzo, Luigi Scipione, Laura Friggeri, Paolo Mellini, Salvatore La Rosa, Silvano Tortorella, Daniela De Vita, and Alessandro Padova

Subjects
Sodium dithionite, chemistry.chemical_compound, Aqueous solution, chemistry, Organic Chemistry, Substituent, Molecule, Organic chemistry, NAD+ kinase, Pyridinium, Medicinal chemistry
Abstract

3,5-Dicarbamoyl-1,4-dihydropyridines were prepared in high yields using a green protocol by reduction of the corresponding pyridinium salts in aqueous buffered sodium dithionite solutions. The pH value is a fundamental parameter for the reduction step and depends on the nature of substituent groups at positions 1, 3, and 5 of the pyridinium salts. These 3,5-dicarbamoyl dihydropyridines show a lower tendency towards oxidation and a higher stability than N-benzyl-3-carbamoyl-1,4-dihydropyridine at low pH values.

Published
2014
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5. Determinants of amikacin first peak concentration in critically ill patients

Author

Boidin, Clément, primary, Jenck, Sophie, additional, Bourguignon, Laurent, additional, Torkmani, Sejad, additional, Roussey-Jean, Aurore, additional, Ledochowski, Stanislas, additional, Marry, Lucie, additional, Ammenouche, Nacim, additional, Dupont, Hervé, additional, Marçon, Frédéric, additional, Allaouchiche, Bernard, additional, Bohé, Julien, additional, Lepape, Alain, additional, Goutelle, Sylvain, additional, and Friggeri, Arnaud, additional

Published
2018
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7. Responsive Cyclohexane-Based Low-Molecular-Weight Hydrogelators with Modular Architecture

Author

Arianna Friggeri, André Heeres, Jan H. van Esch, Auke Meetsma, Ben L. Feringa, Inouk Muizebelt, Cornelia van der Pol, Kjeld J. C. van Bommel, Biobased Ingredients and Materials, Stratingh Institute of Chemistry, Zernike Institute for Advanced Materials, Faculty of Science and Engineering, Solid State Materials for Electronics, and Synthetic Organic Chemistry

Subjects
Models, Molecular, Cyclohexane, Substituent, Molecular Conformation, Crystallography, X-Ray, Catalysis, SELF-ASSEMBLED MONOLAYER, models, chemistry.chemical_compound, GELATION PROCESS, DESIGN, Cyclohexanes, Polymer chemistry, aminozuren, WATER, AMINO-ACIDS, molecular, DRUG-DELIVERY, crystallography, GeneralLiterature_REFERENCE(e.g.,dictionaries,encyclopedias,glossaries), Volume concentration, hydrogels, chemistry.chemical_classification, amino acids, DERIVATIVES, Self-assembled monolayer, General Chemistry, Modular architecture, self-assembly, General Medicine, Hydrogen-Ion Concentration, gels, Amino acid, Molecular Weight, x-ray, chemistry, AQUEOUS GEL, Self-healing hydrogels, ComputingMethodologies_DOCUMENTANDTEXTPROCESSING, ORGANIC GELATORS, Self-assembly, FIBERS
Abstract

pH-sensitive gels: By using a cyclohexane-based scaffold to which various amino acid based substituents can be connected, low-molecular-weight compounds were obtained that can gelate water at very low concentrations. Their modular design (see picture: AA = amino acid(s), X = hydrophilic substituent, dark purple = hydrophobic region, light purple = hydrophilic region), allows tuning of the thermally and pH-induced reversible gel-to-sol transition of their gels.

Published
2004
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8. Recognition of Steroids by Self-Assembled Monolayers of Calix[4]arene-Resorcin[4]arene Receptors

Author

Arianna Friggeri, David N. Reinhoudt, and Frank C. J. M. van Veggel

Subjects
Monolayers, Surface analysis, Aqueous solution, Stereochemistry, Chemistry, Organic Chemistry, Supramolecular chemistry, Self-assembled monolayer, General Chemistry, Supramolecular Chemistry, Catalysis, Surface plasmon resonance, Monolayer, Polymer chemistry, METIS-106258, Steroids, IR-11629, Receptor, Surface plasmon resonance spectroscopy
Abstract

Surface plasmon resonance spectroscopy shows that a self-assembled monolayer of the calix[4]resorcin[4]arene-based receptor 1 binds steroids from aqueous solution. Binding studies with prednisolone-21-acetate, corticosterone-21-acetate, and cortisone-21-acetate, gave affinity constants between 2.0×105 and 3.5×105 m-1.

Published
1999
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9. Trägerfixierte Metallodendrimere: isolierte Moleküle im Nanomaßstab

Author

Henk-Jan van Manen, Bart-Hendrik Huisman, G. Julius Vancso, Edoardo Menozzi, Arianna Friggeri, Wilhelm T.S. Huck, Holger Schönherr, David N. Reinhoudt, Frank C. J. M. van Veggel, Faculty of Science and Technology, and Materials Science and Technology of Polymers

Subjects
Oberflächenchemie, IR-71487, Dendrimere, Nanostrukturen, General Medicine, Monoschichten, Kraftmikroskopie
Abstract

Die Einführung von Dialkylsulfidseitenketten in Metallodendrimere ist eine einfache Strategie für deren Einbau in eine Decanthiolmonoschicht, die zuvor durch Selbstorganisation auf einer Goldoberfläche gebildet wurde. Über den Sulfidanker kann das Dendrimer in Defektstellen der Monoschicht an das Goldsubstrat binden (siehe Bild). Die Oberflächenkonzentration der isolierten Dendrimeradsorbate kann über die Adsorptionszeit gesteuert werden (z.B. 55 Adsorbate auf einer Fläche von 200×200 nm2 nach 20 h.

Published
1999
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11. Organic Templates for the Generation of Inorganic Materials

Author

Arianna Friggeri, Seiji Shinkai, and Kjeld J. C. van Bommel

Subjects
Nanotubes, Carbon, Polymers, Chemistry, Carbon chemistry, Supramolecular chemistry, Biocompatible Materials, Nanotechnology, General Chemistry, General Medicine, Chemistry, Inorganic, Catalysis, Surface-Active Agents, Template, Animals, Inorganic materials, Organic Chemicals
Abstract

Mankind's fascination with shapes and patterns, many examples of which come from nature, has greatly influenced areas such as art and architecture. Science too has long since been interested in the origin of shapes and structures found in nature. Whereas organic chemistry in general, and supramolecular chemistry especially, has been very successful in creating large superstructures of often stunning morphology, inorganic chemistry has lagged behind. Over the last decade, however, researchers in various fields of chemistry have been studying novel methods through which the shape of inorganic materials can be controlled at the micro- or even nanoscopic level. A method that has proven very successful is the formation of inorganic structures under the influence of (bio)organic templates, which has resulted in the generation of a large variety of structured inorganic structures that are currently unattainable through any other method.

Published
2003
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25. Surface-Confined Metallodendrimers: Isolated Nanosize Molecules

Author

Huisman, Bart-Hendrik, primary, Schönherr, Holger, additional, Huck, Wilhelm T. S., additional, Friggeri, Arianna, additional, van Manen, Henk-Jan, additional, Menozzi, Edoardo, additional, Vancso, G. Julius, additional, van Veggel, Frank C. J. M., additional, and Reinhoudt, David N., additional

Published
1999
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