Listar QUIO_Articles por autoría "3e1b2a9e-bf86-43f8-85e4-7a3e061a1015"
Mostrando ítems 21-40 de 54
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Morphology Diversity of L‐Phenylalanine‐Based Short Peptide Supramolecular Aggregates and Hydrogels
Martí-Centelles, Rosa; Escuder, Beatriu Wiley (2018-08)Supramolecular aggregates and hydrogels of diverse morphologies can be obtained by replacing the widely studied aromatic N‐capping of phenylalanine derivatives by long alkyl chains. Simple changes in chain length and number ... -
pH-Tunable Hydrogelators for Water Purification: Structural Optimisation and Evaluation
Greenland, Barnaby W.; Wood, Daniel M.; Acton, Aaron L.; Rodríguez Llansola, Francisco; Murray, Claire A.; Cardin, Christine J.; Miravet, Juan; Escuder, Beatriu; Hamley, Ian W.; Hayes, Wayne Wiley (2012-02)A focused library of potential hydrogelators each containing two substituted aromatic residues separated by a urea or thiourea linkage have been synthesised and characterized. Six of these novel compounds are highly efficient ... -
Rational design of a supramolecular gel based on a Zn(II)–salophen bis-dipeptide derivative
Piccino, Martina; Angulo-Pachón, César A.; Ballester, Pablo; Escuder, Beatriu; Cort, Antonella Dalla 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
Nebot Carda, Vicent J.; Ojeda, Juan José; Smets, Johan; Fernández Prieto, Susana; Escuder, Beatriu; Miravet, Juan 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. ... -
Remarkable increase in basicity associated with supramolecular gelation
Rodríguez Llansola, Francisco; Escuder, Beatriu; Miravet, Juan 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 ... -
Selective and highly efficient dye scavenging by a pH-responsive molecular hydrogelator
Rodríguez Llansola, Francisco; Escuder, Beatriu; Miravet, Juan; Hermida Merino, Daniel; Hamley, Ian W.; Cardin, Christine J.; Hayes, Wayne Royal Society of Chemistry (2010)A structurally simple low molecular weight hydrogelator derived from isophthalic acid forms robust pH-responsive hydrogels capable of highly efficient and selective dye adsorption. -
Selective catechol-triggered supramolecular gel disassembly
Sáez, José A.; Escuder, Beatriu; Miravet, Juan Royal Society of Chemistry (2010)Supramolecular gels formed by an isonicotinic acid derivative in toluene are selectively disassembled in the presence of catechol. The results represent a unique example of molecular recognition associated to gel rupture ... -
Selective Interaction of Dopamine with the Self-Assembled Fibrillar Network of a Molecular Hydrogel Revealed by STD-NMR
Segarra Maset, María Dolores; Escuder, Beatriu; Miravet, Juan Wiley (2015-09-28)A molecular hydrogel formed by a derivative of L-valine with pendant isonicotinoyl moieties interacts selectively with protonated dopamine in the presence of related compounds such as 3-methylcatechol, and protonated or ... -
Self-assembled hybrid hydrogels based on an amphipathic low molecular weight peptide derivative and a water-soluble poly(para-phenylene vinylene)
RUBIO-MAGNIETO, JENIFER; Tena Solsona, Marta; Escuder, Beatriu; Surin, Mathieu Royal Society of Chemistry (2017)The self-assembly of an amphipathic low molecular weight peptide and a water-soluble p-conjugated polyelectrolyte is studied in order to form hybrid hydrogel materials with synergistic properties. The self-assembly of ... -
Self-assembled multivalent (SAMul) ligand systems with enhanced stability in the presence of human serum
Tena Solsona, Marta; Marson, Domenico; Rodrigo, Ana C.; Bromfield, Stephen M.; Escuder, Beatriu; Miravet, Juan; Apostolova, Nadezda; Laurini, Erik; Pricl, Sabrina Royal Society of Chemistry (2019)Self-assembled cationic micelles are an attractive platform for binding biologically-relevant polyanions such as heparin. This has potential applications in coagulation control, where a synthetic heparin rescue agent could ... -
Self-assembly of a peptide amphiphile: transition from nanotape fibrils to micelles
Miravet, Juan; Escuder, Beatriu; Segarra Maset, María Dolores; Tena Solsona, Marta; Hamley, Ian W.; Dehsorkhi, Ashkan; Castelletto, Valeria Royal Society of Chemistry (2013-02)A thermal transition is observed in the peptide amphiphile C16-KTTKS (TFA salt) from nanotapes at 20 °C to micelles at higher temperature (the transition temperature depending on concentration). The formation of extended ... -
Self-Assembly of Two-Component Gels: Stoichiometric Control and Component Selection
Hirst, Andrew R.; Miravet, Juan; Escuder, Beatriu; Noirez, Laurence; Castelletto, Valeria; Hamley, Ian W.; Smith, David K. Wiley (2009)Two-component systems capable of self-assembling into soft gel-phase materials are of considerable interest due to their tunability and versatility. This paper investigates two-component gels based on a combination of a ... -
Self-Assembly Studies of a Chiral Bisurea-Based Superhydrogelator
Rodríguez Llansola, Francisco; Hermida Merino, Daniel; Nieto Ortega, Belén; Ramírez, Francisco J.; López Navarrete, Juan T.; Casado, Juan; Hamley, Ian W.; Escuder, Beatriu; Hayes, Wayne; Miravet, Juan Wiley (2012-11)A chiral bisurea-based superhydrogelator that is capable of forming supramolecular hydrogels at concentrations as low as 0.2 mM is reported. This soft material has been characterized by thermal studies, rheology, X-ray ... -
Solid-State Polymorphic Transition and Solvent-Free Self-Assembly in the Growth of Organic Crystalline Microfibers
Tsekova, Daniela S.; Escuder, Beatriu; Miravet, Juan American Chemical Society (2008)The study of the crystalline xerogel formed by a newly synthesized l-valine and pyridine containing low-molecular-weight gelator reveals a polymorphic transition above 225 °C that is followed by the formation of microfibers. ... -
Structural and morphological studies of the dipeptide based L-Pro-L-Val organocatalytic gels and their rheological behaviour
Escuder, Beatriu; Rodríguez-Llansola, Francisco; Hamley, Ian W.; Miravet, Juan; Hayes, Wayne Royal Society of Chemistry (2012-07)Organocatalytic gels based on the dipeptide sequence L-Pro-L-Val have been studied by two different FTIR techniques. This suggests a different arrangement of the gelator molecules in the self-assembled fibers depending on ... -
Structural insight into the aggregation of L-prolyl dipeptides and its effect on organocatalytic performance
Berdugo Gumbau, Cristina; Escuder, Beatriu; Miravet, Juan Royal Society of Chemistry (2015)NMR and organocatalytic studies of four dipeptides derived from L-proline are described. Results indicate that important conformational changes around the catalytic L-proline moiety are observed for free dipeptides upon ... -
Study of the effect of polymorphism on the self-assembly and catalytic performance of an L-proline based molecular hydrogelator
Diaz-Oltra, Santiago; Berdugo Gumbau, Cristina; Miravet, Juan; Escuder, Beatriu Royal Society of Chemistry (2015)An exhaustive study of the polymorphism found for aggregates and hydrogels of an L-proline based hydrogelator under different preparation conditions is undertaken. The effect of heating temperature, aging time, ultrasound ... -
Substrate selective catalytic molecular hydrogels: the role of the hydrophobic effect
Berdugo Gumbau, Cristina; Miravet, Juan; Escuder, Beatriu Royal Society of Chemistry (2013-09-17)A catalytic hydrogel is reported for the substrate selective direct aldol reaction of aliphatic ketones based on their hydrophobicity and on the emergence of catalytic activity only after self-assembly of the catalyst. -
Supramolecular Catalysis with Extended Aggregates and Gels: Inversion of Stereoselectivity Caused by Self-Assembly
Rodríguez Llansola, Francisco; Miravet, Juan; Escuder, Beatriu Wiley-VCH (2010)L-Proline-L-valine dipeptide derivatives, which self-assemble in toluene, have been studied as stereoselective catalysts in the conjugate addition of cyclohexanone to trans-β-nitrostyrene. Remarkable effects on the ... -
Supramolecular gel formation and self-correction induced by aggregation-driven conformational changes
Rodríguez Llansola, Francisco; Miravet, Juan; Escuder, Beatriu Royal Society of Chemistry (2009)The formation of self-assembled fibrillar networks by low molecular weight peptidomimetics containing a Pro-Val moiety is reported; insight into the aggregation mechanism is provided revealing that it is associated to ...