Listar por autoría "3e1b2a9e-bf86-43f8-85e4-7a3e061a1015"
Mostrando ítems 1-20 de 58
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A minimalistic catalytically-active cell mimetic made of a supra-molecular hydrogel encapsulated into a polymersome
Martí-Centelles, Rosa; RUBIO-MAGNIETO, JENIFER; Escuder, Beatriu Royal Society of Chemistry (2020)A minimalistic multicomponent cell mimetic is described consisting of a fibrillar network formed by the self-assembly of a low molecular weight compound (cytoskeleton-like) that is entrapped into a polymersome (membrane-like), ... -
A supramolecular hydrogel as a reusable heterogeneous catalyst for the direct aldol reaction
Rodríguez Llansola, Francisco; Miravet, Juan; Escuder, Beatriu Royal Society of Chemistry (2009)An L-proline based supramolecular hydrogel is used as an efficient heterogeneous organocatalyst for the direct aldol reaction with high stereoselectivity (up to 90% ee) and recyclability (up to 3 runs). The reversible ... -
Anion-Responsive Diguanidinium-Based Chiral Organogelators
Valero, Julián; Escuder, Beatriu; Miravet, Juan; Mendoza, Javier de Wiley (2012-10)The chiral bicyclic diguanidinium chloride 1 forms gels in aromatic apolar solvents. The gels were characterized at different levels of organization, from the macroscopic to the molecular level by using microscopy, ... -
Biomimetic self-assembly of tetrapeptides into fibrillar networks and organogels
Iqbal, Sajid; Miravet, Juan; Escuder, Beatriu WILEY-VCH (2008)The self-assembly features of a family of tetrapeptides inspired in silk structure are presented. An exhaustive study of the influence of the terminal alkyl chain length in this process is undertaken. Scanning electron ... -
Co-assembly of tetrapeptides into complex pH-responsive molecular hydrogel networks
Tena Solsona, Marta; Alonso de Castro, S.; Miravet, Juan; Escuder, Beatriu Royal Society of Chemistry (2014-07)Here we prepare pH-responsive complex molecular hydrogels from oppositely charged tetrapeptidic components that can be pH-tuned resulting in interconversion between different networks. Two different systems are described ... -
Competition versus Cooperation in Catalytic Hydrogelators for anti-Selective Mannich Reaction
Singh, Nishant; Escuder, Beatriu Wiley (2017-07-21)Chemical systems find similarities in different sociological and biological processes, in which the entities compete or cooperate for a favorable outcome. The structural and functional adaptations leading to emergent ... -
Control of molecular gelation by chemical stimuli
Segarra Maset, María Dolores; Nebot Carda, Vicent J.; Miravet, Juan; Escuder, Beatriu Royal Society of Chemistry (2012-12-21)Molecular gels are formed by the self-assembly of low-molecular weight compounds by weak non-covalent interactions and thus, they may be easily disassembled in response to external stimuli. Chemically sensitive gels can ... -
Diamine acylation with amino acid derivatives: an example of proximity effect in organic reactivity induced by supramolecular aggregation
Felip-León, Carles; Segarra Maset, María Dolores; Escuder, Beatriu; Miravet, Juan Elsevier (2015-02)Unexpected high yields of diamide 3 are obtained in the reaction of 1,3-propanediamine with an activated ester of l-valine (1) under adverse proportions of the reactants, namely in the presence of an excess of 1,3-propanediamine. ... -
Dynamic Peptide Library for the Discovery of Charge Transfer Hydrogels
Berdugo Gumbau, Cristina; Nalluri, Siva Krishna Mohan; Javid, Nadeem; Escuder, Beatriu; Miravet, Juan; Ulijn, R. V. ACS Publications (2015)Coupling of peptide self-assembly to dynamic sequence exchange provides a useful approach for the discovery of self-assembling materials. In here, we demonstrate the discovery and optimization of aqueous, gel-phase ... -
Effect of Hyaluronic Acid on the Self-Assembly of a Dipeptide-Based Supramolecular Gel
Giménez Hernández, Bárbara; Falomir, Eva; Escuder, Beatriu Wiley (2023-10-02)The combination of polymers and low molecular weight (LMW) compounds is a powerful approach to prepare new supramolecular materials. Here we prepare two-component hydrogels made by a well-known and biologically active ... -
Freezing Capture of Polymorphic Aggregates of Bolaamphiphilic L-Valine-Based Molecular Hydrogelators
Nebot Carda, Vicent J.; Diaz-Oltra, Santiago; Smets, Johan; Fernández Prieto, Susana; Miravet, Juan; Escuder, Beatriu WILEY-VCH Verlag GmbH & Co. KGaA (2014-05)Nanostructured xerogels have been prepared by the freeze-drying of hydrogels and aggregates formed by bolaamphiphilic l-valine derivatives after aging under different environmental conditions. A wide variety of shapes and ... -
High-Tech Applications of Self-Assembling Supramolecular Nanostructured Gel-Phase Materials: From Regenerative Medicine to Electronic Devices
Hirst, Andrew R.; Escuder, Beatriu; Miravet, Juan; Smith, David K. John Wiley & Sons (2008)It is likely that nanofabrication will underpin many technologies in the 21st century. Synthetic chemistry is a powerful approach to generate molecular structures that are capable of assembling into functional nanoscale ... -
HRMAS 1H NMR as a tool for the study of supramolecular gels
Iqbal, Sajid; Rodríguez Llansola, Francisco; Escuder, Beatriu; Miravet, Juan; Verbruggen, Ingrid; Willem, Rudolph Royal Society of Chemistry (2010-03-30)HRMAS 1H NMR is reported for the first time as a useful technique to gain insight into the dynamic properties of aggregates present in supramolecular gels. The study of several low molecular weight gelators with this ... -
Impact of core-shell perovskite nanocrystals for LED applications: successes, challenges, and prospects
Das Adhikari, Samrat; Gualdrón Reyes, Andrés Fabián; Paul, Subir; Torres, Jeevan; Escuder, Beatriu; Mora-Sero, Ivan; Masi, Sofia The Royal Society of Chemistry (2023-07-24)Perovskite nanocrystals (PeNCs) synthesized by colloidal solution methods are an outstanding case of study due to their remarkable optical features, different from their bulk counterpart, such as a tuneable band gap and ... -
In situ synthesis-gelation at room temperature vs. heating–cooling procedure. Fine tuning of molecular gels derived from succinic acid and L-valine
Fontanillo, Miriam; Angulo-Pachón, César A.; Escuder, Beatriu; Miravet, Juan Elsevier (2013-12)Hypothesis The reaction between succinic anhydride and a diamine derived from L-valine should afford efficiently a molecular gelator. Based on this reaction, it should be feasible to prepare molecular gels at room ... -
Influence of the Solvent on the Self-Assembly of a Modified Amyloid Beta Peptide Fragment. II. NMR and Computer Simulation Investigation
Hamley, Ian W.; Nutt, D. R.; Brown, G. D.; Miravet, Juan; Escuder, Beatriu; Rodríguez Llansola, Francisco American Chemical Society (2010)The conformation of a model peptide AAKLVFF based on a fragment of the amyloid β peptide Aβ16−20, KLVFF, is investigated in methanol and water via solution NMR experiments and molecular dynamics computer simulations. In ... -
Insight into the esterase like activity demonstrated by an imidazole appended self-assembling hydrogelator
Singh, Nishant; Conte, M. P.; Ulijn, R. V.; Miravet, Juan; Escuder, Beatriu Royal Society of Chemistry (2016)A low molecular weight hydrogelator with a covalently appended imidazole moiety is reported. Capable of percolating water in the pH range of 6 to 8, it proves to be an efficient catalyst upon self-assembly, showing ... -
Interplay of Molecular Hydrogelators and SDS Affords Responsive Soft Matter Systems with Tunable Properties
Nebot Carda, Vicent J.; Escuder, Beatriu; Miravet, Juan; Smets, Johan; Fernández Prieto, Susana American Chemical Society (2013)The gelation efficiency of low molecular weight bolaamphiphilic hydrogelators 1 and 2 is influenced by the presence of SDS micelles. Similarly, the critical micellar concentration value of SDS is reduced in the presence ... -
Low-Molecular-Weight Gelators: Elucidating the Principles of Gelation Based on Gelator Solubility and a Cooperative Self-Assembly Model
Hirst, Andrew R.; Coates, Ian A.; Boucheteau, Thomas R.; Miravet, Juan; Escuder, Beatriu; Castelletto, Valeria; Hamley, Ian W.; Smith, David K. American Chemical Society (2008)This paper highlights the key role played by solubility in influencing gelation and demonstrates that many facets of the gelation process depend on this vital parameter. In particular, we relate thermal stability (Tgel) ... -
Mechanistic Insight into the Lability of the Benzyloxycarbonyl (Z) Group inN-Protected Peptides under Mild Basic Conditions
Tena Solsona, Marta; Angulo-Pachón, César A.; Escuder, Beatriu; Miravet, Juan Wiley Online Library (2014)The unexpected lability of Z protecting group under mild basic conditions at room temperature is explained by a mechanism based on anchimeric assistance. It is found that the vicinal amide group stabilizes the tetrahedral ...