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\n \n \n \n \n \"ITMNR\n \n \n
\n \n From 12/10/2026 to 16/10/2026\n\n\n \n \n 10th International Topical Meeting on Neutron Radiography\n \n \n \n
\n \n En savoir plus ...\n \n
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\n \n \n \n \n \"fibrinogen\n \n \n
\n \n 21/10/2026 - 14h00 to 16h00\n\n\n \n \n College 9 Seminar | Wound Healing \u2013 Redefining Fibrinogen Adsorption at the Air\u2013Water Interface: an Intriguing Story with Multiple Layers\n \n \n \n
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\n \n \n\n\n \n\n\nCollege 9\n\n\n \n \n\n\n \n\n\nSeminars/Webinars/Colloquia\n\n\n \n
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\n \n \n \n \n \"College\n \n \n
\n \n 26/10/2026 - 14h00 to 15h00\n\n\n \n \n College 9 Seminar | Dynamic Supramolecular Eutectogels with Reversible Light Driven Reconfiguration\n \n \n \n
\n \n General ILL seminar organised by College 9\r\nMonday 26 October, 2026 at 14h00\r\nSeminar room 110-111, ILL 50, 1st floor\r\nZoom link: https://ill.zoom.us/j/93326326401?pwd=mq7JqMLctpkqw7hIcPWTq6QGt8nGOg.1\r\nPasscode: SeminarC9\r\n" Dynamic Supramolecular Eutectogels with Reversible Light Driven Reconfiguration "\r\nRam\u00f3n Riala, Isabella M.V. Ewellb, Miguel No-G\u00f3mezb, Javier Montenegrob, A. S\u00e1nchez-Fern\u00e1ndezc\r\nCentro Singular de Investigacio\u0301n en Qui\u0301mica Biolo\u0301xica e Materiais Moleculares (CIQUS), Departamento de F\u00edsica Aplicada, Universidade de Santiago de Compostela, Santiago de Compostela, Spain.\r\nCentro Singular de Investigacio\u0301n en Qui\u0301mica Biolo\u0301xica e Materiais Moleculares (CIQUS), Departamento de Qu\u00edmica Org\u00e1nica, Universidade de Santiago de Compostela, Santiago de Compostela, Spain.\r\nCentro Singular de Investigacio\u0301n en Qui\u0301mica Biolo\u0301xica e Materiais Moleculares (CIQUS), Departamento de Enxe\u00f1ar\u00eda Qu\u00edmica, Universidade de Santiago de Compostela, Santiago de Compostela, Spain.\r\nramon.rial@usc.es\r\n\r\nDeep eutectic solvents (DESs) constitute a highly tunable class of liquid media formed by the association of two or more components (e.g., a hydrogen-bond donor and an organic salt), whose extensive hydrogen bonding interactions result in a pronounced depression of the melting point. Their composition-dependent physicochemical properties make DESs particularly attractive for directing the self-assembly of functional soft materials [1,2]. In this context, eutectogels (gels formed within DES media), offer a versatile platform in which solvent\u2013solute interactions can be exploited to modulate macroscopic material properties beyond those dictated by the gelator alone [3].\r\nHerein, we report a versatile strategy for the design of light-responsive eutectogels with intrinsically tunable mechanical properties. The approach relies on the supramolecular co-assembly of an amphiphilic component with a rationally designed azobenzene derivative engineered for high solubility in water-free DES media. Through complementary characterization across molecular and mesoscale length scales, we provided a detailed understanding of the heterotypic interactions underlying the formation of elongated, one-dimensional supramolecular networks. We further establish that photoisomerization of the azobenzene units induces pronounced rearrangements of these networks, providing a molecular-level mechanism for controlling the material\u2019s hierarchical organization.\r\nUpon ultraviolet irradiation, this molecular reconfiguration leads to an abrupt gel-to-sol transition, effectively erasing the material\u2019s solid-like mechanical response. Subsequent exposure to visible light reverses the process, restoring the gel state and recovering a mechanically robust network that remains stable during prolonged storage without appreciable loss of performance. Remarkably, the optically driven transition is highly reversible and cyclable, enabling repeated switching between gel and sol states without detectable deterioration of structural integrity or mechanical properties. Collectively, these results demonstrate how molecular photochemical events can be translated into reversible macroscopic mechanical actuation, establishing DES-based supramolecular eutectogels as promising platforms for dynamically reconfigurable soft matter.\r\nKeywords\r\nDeep Eutectic Solvents, Eutectogels, Photo-responsive Materials, Self-Assembly\r\nAcknowledgements\r\nThe authors acknowledge financial support from MCIN/AEI (RYC2022-037909-I and PID2022-141673OA-I00).\r\nReferences:\r\n[1] Hansen, B. et al., Chem. Rev. 2021, 101, 1232-1285.\r\n[2] P. A. Mercadal, A. Gonz\u00e1lez, A. Beloqui, L. C. Tom\u00e9, D. Mecerreyes, M. Calder\u00f3n and M. L. Picchio, JACS Au, 2024, 4, 3744-3758.\r\n[3] A. Sanchez-Fernandez, J. F. Poon, A. E. Leung, S. F. Prevost and C. Dicko, ACS Nano, 2024, 18, 18314-18326.\r\n\r\nExternal visitors may ask for a site access to tellier@ill.fr\n \n
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