{"id":9387,"date":"2026-04-10T14:23:40","date_gmt":"2026-04-10T14:23:40","guid":{"rendered":"https:\/\/lumomat.fr\/?p=9387"},"modified":"2026-04-10T14:23:41","modified_gmt":"2026-04-10T14:23:41","slug":"journee-scientifique-lumomat-mai-2026-nantes","status":"publish","type":"post","link":"https:\/\/lumomat.fr\/eng\/journee-scientifique-lumomat-mai-2026-nantes\/","title":{"rendered":"Journ\u00e9e Scientifique Lumomat 20 Mai 2026 \u00e0 Nantes : inscrivez-vous !"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"9387\" class=\"elementor elementor-9387\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-ef26e3b e-flex e-con-boxed e-con e-parent\" data-id=\"ef26e3b\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-266788c elementor-widget elementor-widget-heading\" data-id=\"266788c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">4e \u00e9dition de la Journ\u00e9e Scientifique Lumomat<\/h2>\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-7c029c2 e-flex e-con-boxed e-con e-parent\" data-id=\"7c029c2\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-60b96f0 elementor-widget elementor-widget-text-editor\" data-id=\"60b96f0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>L&rsquo;\u00c9cole Universitaire de Recherche Lumomat a la plaisir de vous inviter \u00e0 sa 4\u00e8me<span class=\"notion-enable-hover\" data-token-index=\"1\">\u00a0<\/span>Journ\u00e9e Scientifique qui se d\u00e9roulera <span class=\"notion-enable-hover\" data-token-index=\"3\"> le Mercredi 20 Mai 2026\u00a0\u00e0<\/span> <span class=\"notion-enable-hover\" data-token-index=\"5\">Nantes.<\/span><!-- notionvc: 0af8fd9e-5eb1-4dd2-ab70-3d651586f67d --><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-353dc0f e-flex e-con-boxed e-con e-parent\" data-id=\"353dc0f\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-bad4ca7 elementor-widget elementor-widget-heading\" data-id=\"bad4ca7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">\ud83d\udcc6 Programme de la journ\u00e9e<\/h2>\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-5f888ef e-flex e-con-boxed e-con e-parent\" data-id=\"5f888ef\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-4dcdab8 elementor-widget elementor-widget-text-editor\" data-id=\"4dcdab8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<ul><li><a href=\"https:\/\/evenement.univ-angers.fr\/journee-scientifique-lumomat-nantes-2026\/pages\/conferences\">4 conf\u00e9rences pl\u00e9ni\u00e8res anim\u00e9es par des chercheurs et chercheuses internationaux.<\/a><strong><br \/><\/strong><\/li><li>Des communications orales des doctorantes et doctorants du r\u00e9seau Lumomat (sur s\u00e9lection).<\/li><li>Une session posters (sur simple inscription).<\/li><\/ul><p><!-- notionvc: 400f46e6-093f-4db1-8bd6-4f70530ce72d --><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-24fc16a e-flex e-con-boxed e-con e-parent\" data-id=\"24fc16a\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-a77c8ab elementor-widget elementor-widget-heading\" data-id=\"a77c8ab\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">\u2796 Conf\u00e9rences internationales<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-aecf227 elementor-widget elementor-widget-n-accordion\" data-id=\"aecf227\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;default_state&quot;:&quot;expanded&quot;,&quot;max_items_expended&quot;:&quot;one&quot;,&quot;n_accordion_animation_duration&quot;:{&quot;unit&quot;:&quot;ms&quot;,&quot;size&quot;:400,&quot;sizes&quot;:[]}}\" data-widget_type=\"nested-accordion.default\">\n\t\t\t\t\t\t\t<div class=\"e-n-accordion\" aria-label=\"Accordion. Open links with Enter or Space, close with Escape, and navigate with Arrow Keys\">\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-1830\" class=\"e-n-accordion-item\" open>\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"1\" tabindex=\"0\" aria-expanded=\"true\" aria-controls=\"e-n-accordion-item-1830\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> Erick L. Bastos (Institute of Chemistry - University of S\u00e3o Paulo (IQ-USP)) - Br\u00e9sil <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-minus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-plus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-1830\" class=\"elementor-element elementor-element-24b9a65 e-con-full e-flex e-con e-child\" data-id=\"24b9a65\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-1830\" class=\"elementor-element elementor-element-e4f2145 e-flex e-con-boxed e-con e-child\" data-id=\"e4f2145\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-1830\" class=\"elementor-element elementor-element-50aa04b e-grid e-con-full e-con e-child\" data-id=\"50aa04b\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-0c6b830 elementor-widget elementor-widget-image\" data-id=\"0c6b830\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/lumomat.fr\/wp-content\/uploads\/2026\/03\/Bastos_EL-Carre-1024x1024.jpg\" class=\"attachment-large size-large wp-image-9863\" alt=\"\" srcset=\"https:\/\/lumomat.fr\/wp-content\/uploads\/2026\/03\/Bastos_EL-Carre-1024x1024.jpg 1024w, https:\/\/lumomat.fr\/wp-content\/uploads\/2026\/03\/Bastos_EL-Carre-300x300.jpg 300w, https:\/\/lumomat.fr\/wp-content\/uploads\/2026\/03\/Bastos_EL-Carre-150x150.jpg 150w, https:\/\/lumomat.fr\/wp-content\/uploads\/2026\/03\/Bastos_EL-Carre-768x768.jpg 768w, https:\/\/lumomat.fr\/wp-content\/uploads\/2026\/03\/Bastos_EL-Carre-1536x1536.jpg 1536w, https:\/\/lumomat.fr\/wp-content\/uploads\/2026\/03\/Bastos_EL-Carre-12x12.jpg 12w, https:\/\/lumomat.fr\/wp-content\/uploads\/2026\/03\/Bastos_EL-Carre.jpg 1728w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c6be0ea elementor-widget elementor-widget-heading\" data-id=\"c6be0ea\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Nature\u2019s Colorful Palette: Functional Betalain Photochemistry<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-abd8669 elementor-widget elementor-widget-text-editor\" data-id=\"abd8669\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><b><span lang=\"EN-US\">\u00a0<\/span><\/b><span lang=\"EN-US\">This talk explores the biofluorescence of plant pigments, with emphasis on betalains as versatile scaffolds for functional molecular systems and advanced materials. We investigate the photophysical and photochemical behavior of these natural products and their pseudo-natural derivatives to establish structure\u2013property relationships. These insights have enabled the development of safe colorants and fluorescent dyes, tunable superoxide generators, and self-assembling chiral systems that direct energy transfer. Together, these advances illustrate sustainable strategies for sensing, imaging, redox chemistry, and energy conversion.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-1831\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"2\" tabindex=\"-1\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-1831\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> In\u00e9s Corral P\u00e9rez (Autonomous Univeristy of Madrid) - Espagne <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-minus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-plus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-1831\" class=\"elementor-element elementor-element-36543f0 e-con-full e-flex e-con e-child\" data-id=\"36543f0\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-1831\" class=\"elementor-element elementor-element-f6c7e62 e-grid e-con-full e-con e-child\" data-id=\"f6c7e62\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-3fde048 elementor-widget elementor-widget-image\" data-id=\"3fde048\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"320\" height=\"400\" src=\"https:\/\/lumomat.fr\/wp-content\/uploads\/2026\/03\/foto_ines.jpeg\" class=\"attachment-large size-large wp-image-9864\" alt=\"\" srcset=\"https:\/\/lumomat.fr\/wp-content\/uploads\/2026\/03\/foto_ines.jpeg 320w, https:\/\/lumomat.fr\/wp-content\/uploads\/2026\/03\/foto_ines-240x300.jpeg 240w, https:\/\/lumomat.fr\/wp-content\/uploads\/2026\/03\/foto_ines-10x12.jpeg 10w\" sizes=\"(max-width: 320px) 100vw, 320px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0455be9 elementor-widget elementor-widget-heading\" data-id=\"0455be9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Light-Driven Chemistry from Molecular Origins to Functional Nanomaterials Organic triplet photosensitizers: molecular design, mechanisms and applications<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-853db49 elementor-widget elementor-widget-text-editor\" data-id=\"853db49\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><span lang=\"EN-US\">Electronic excited states define how molecules survive, transform, and function upon light absorption. From the photostability of DNA to the optical response of functional nanomaterials, understanding these excited-state processes is essential to rationalizing both biological resilience and optoelectronic performance.<\/span><\/p><p><span lang=\"EN-US\">In DNA, the remarkable photostability of canonical nucleobases is rooted in the topography of their excited-state potential energy surfaces. Ultrafast internal conversion pathways efficiently funnel the excited population back to the ground state, minimizing excited-state lifetimes, fluorescence, and triplet formation. By systematically exploring substitution effects in purine and pyrimidine derivatives, we identify the key structural and electronic factors that differentiate canonical nucleobases from alternative heterocycles and underpin their photophysical robustness. [1\u20133]<\/span><\/p><p><span lang=\"EN-US\">At the other end of the molecular complexity spectrum, \u03c0-conjugated nanographenes exhibit tunable band gaps, rich emission profiles, and promising optoelectronic functionalities. Curvature, helicene constraints, and supramolecular organization introduce multiple deactivation channels, including thermally activated delayed fluorescence and efficient singlet oxygen generation. These structural features give rise to intricate excited-state landscapes that directly govern their optical properties. [4,5]<\/span><\/p><p><span lang=\"EN-US\">Using advanced quantum chemical approaches and excited-state simulations, we uncover the relaxation pathways that govern light-induced processes in both nucleobases and nanographenes. By revealing the excited-state principles underlying molecular photostability and functional photophysics, these studies provide a coherent framework to understand how structure shapes light-induced dynamics across chemically diverse \u03c0-systems.<\/span><\/p><p><span lang=\"EN-US\">References: [1] C. E. Crespo-Hern\u00e1ndez, L. Mart\u00ednez-Fern\u00e1ndez, C. Rauer, C. Reichardt, S. Mai, M. Pollum, P. Marquetand, L. Gonz\u00e1lez, I. Corral, J. Am. Chem. Soc. 2015, 137, 4368.\u00a0<\/span><span lang=\"EN-US\">[2] E. Vos, S. J. Hoehn, S. E. Krul, C. E. Crespo-Hern\u00e1ndez, J. Gonz\u00e1lez-V\u00e1zquez, I. Corral, J. Phys. Chem. Lett. 13, 2022, 2000.\u00a0<\/span><span lang=\"EN-US\">[3] L. Mart\u00ednez-Fern\u00e1ndez, I. Corral, Excited States Reactivity of Natural and Unnatural DNA Nucleobases in Comprehensive Computational Chemistry, Volume 4, 2024, 306-329, Elsevier\u00a0<\/span><span lang=\"EN-US\">[4] S. Ram\u00edrez-Barroso, F. Romeo-Gella, J. M. Fern\u00e1ndez-Garc\u00eda, S. Feng, L. Mart\u00ednez-Fern\u00e1ndez, D. Garc\u00eda-Fresnadillo, I. Corral, N. Mart\u00edn, R. Wannemacher, Adv. Mat. 2023, 35, 2212064.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-1832\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"3\" tabindex=\"-1\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-1832\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> Mariangela Di Donato (The Institute of Chemistry of OrganoMetallic Compounds \/ LENS-European Laboratory for Nonlinear Spectroscopy) - Italie <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-minus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-plus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-1832\" class=\"elementor-element elementor-element-80ed378 e-con-full e-flex e-con e-child\" data-id=\"80ed378\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-1832\" class=\"elementor-element elementor-element-4dc6d79 e-grid e-con-full e-con e-child\" data-id=\"4dc6d79\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-80e2615 elementor-widget elementor-widget-image\" data-id=\"80e2615\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"380\" height=\"380\" src=\"https:\/\/lumomat.fr\/wp-content\/uploads\/2026\/03\/Photo-Mariangela-Di-Donato-Carre.jpg\" class=\"attachment-large size-large wp-image-9865\" alt=\"\" srcset=\"https:\/\/lumomat.fr\/wp-content\/uploads\/2026\/03\/Photo-Mariangela-Di-Donato-Carre.jpg 380w, https:\/\/lumomat.fr\/wp-content\/uploads\/2026\/03\/Photo-Mariangela-Di-Donato-Carre-300x300.jpg 300w, https:\/\/lumomat.fr\/wp-content\/uploads\/2026\/03\/Photo-Mariangela-Di-Donato-Carre-150x150.jpg 150w, https:\/\/lumomat.fr\/wp-content\/uploads\/2026\/03\/Photo-Mariangela-Di-Donato-Carre-12x12.jpg 12w\" sizes=\"(max-width: 380px) 100vw, 380px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c3ac35d elementor-widget elementor-widget-heading\" data-id=\"c3ac35d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\"> Organic triplet photosensitizers: molecular design, mechanisms and applications <\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8427be4 elementor-widget elementor-widget-text-editor\" data-id=\"8427be4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><span lang=\"EN-US\">The design and synthesis of organic compounds presenting efficient Inter System Crossing (ISC) and long-lived triplet excited states holds significant importance for multiple applications, encompassing photovoltaics, photocatalysis, photodynamic therapy and biosensing. Nevertheless, our understanding of the photophysical mechanisms underpinning the formation and temporal evolution of triplets remains incomplete. Efficient ISC usually requires the use of heavy atoms, posing problems about toxicity and increased synthetic costs, while the realization of fully organic supramolecular structures efficiently producing long lived triplet states upon the absorption of visible light still represents a challenging goal. We characterized different triplet photosensitizers (PSs) devoid of heavy atoms, whose molecular structure is meticulously optimized to amplify spin-orbit coupling, thereby enhancing ISC efficiency through various promising mechanisms, including Charge Transfer-ISC [1], Symmetry Breaking-ISC [2], and specific molecular design strategies tailored to stabilize the triplet state [3]. We employ a comprehensive approach to investigate the photochemical properties of these compounds, involving various steady state and time-resolved spectroscopy techniques, cyclic voltammetry, and density functional theory (DFT) calculations. Our studies provide significant advances toward the realization of highly efficient triplet PSs, whose electronic properties can be fine-tuned to align with the requirements of specific applications. <\/span><\/p><p><span lang=\"EN-US\">References :\u00a0<\/span><span lang=\"EN-US\">[1] J. Deckers et al,<\/span> <span lang=\"EN-US\">J. Mater. Chem. C, 2022, 10, 9344; <\/span><span lang=\"EN-CA\">Z Wang, et al, Chemistry\u2013A European Journal, 2020, 26, 1091-1102.\u00a0<\/span><span lang=\"EN-US\">[2] <\/span><span lang=\"EN-CA\">Y Liu et al, The Journal of Physical Chemistry C, 2018, 122, 2502-2511\u00a0<\/span><span lang=\"EN-US\">[3] D. Liu et al, Angew. Chem. Int. Ed. 2020, 59, 11591 \u2013 11599<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-1833\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"4\" tabindex=\"-1\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-1833\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> Timothy Barendt (School of Chemistry - University of Birmingham) - Royaume-Uni <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-minus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-plus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-1833\" class=\"elementor-element elementor-element-04730b2 e-flex e-con-boxed e-con e-child\" data-id=\"04730b2\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-1833\" class=\"elementor-element elementor-element-f5bd8dc e-grid e-con-full e-con e-child\" data-id=\"f5bd8dc\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-6261240 elementor-widget elementor-widget-image\" data-id=\"6261240\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"251\" height=\"251\" src=\"https:\/\/lumomat.fr\/wp-content\/uploads\/2026\/03\/Timothy-Barendt-Photo-Carre.png\" class=\"attachment-large size-large wp-image-9866\" alt=\"\" srcset=\"https:\/\/lumomat.fr\/wp-content\/uploads\/2026\/03\/Timothy-Barendt-Photo-Carre.png 251w, https:\/\/lumomat.fr\/wp-content\/uploads\/2026\/03\/Timothy-Barendt-Photo-Carre-150x150.png 150w, https:\/\/lumomat.fr\/wp-content\/uploads\/2026\/03\/Timothy-Barendt-Photo-Carre-12x12.png 12w\" sizes=\"(max-width: 251px) 100vw, 251px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-efb3c15 elementor-widget elementor-widget-heading\" data-id=\"efb3c15\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Chiral perylene diimide macrocycles<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-71aeda4 elementor-widget elementor-widget-text-editor\" data-id=\"71aeda4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Perylene diimides (PDIs) are readily functionalisable organic dye molecules and, due to their electron-accepting and photophysical properties, promising building blocks for optoelectronic materials.<sup>1<\/sup> PDIs may also be chiral,<sup>2<\/sup> giving rise to the absorption and\/or emission of circularly polarised light. Here, the supramolecular chemistry of PDIs promises the exciting potential to control and amplify these chiroptical properties, which is important for emerging applications in chiroptical sensing, chiral optoelectronics, and spintronics.<\/p><p>Macrocycles provide the opportunity to tune the non-covalent interactions between components preorganised within their cyclic framework.<sup>3<\/sup> As such, we have developed chiral macrocycles to understand how the (\u03c0\u2013\u03c0) interactions between PDI chromophores impacts their chiral arrangement and in turn their electronic and chiroptical properties (Figure 1). We have explored several sources of chirality in these macrocycles, including those containing helical, core-twisted PDIs<sup>4,5 <\/sup>(Figure 1a) and those with point-chiral linkers that give rise to supramolecular chirality (Figure 1b), between planar PDIs.<sup>6,7<\/sup> This presentation will outline how these macrocycles enable us to tune the supramolecular, photophysical and chiroptical properties of PDI assemblies, in both solution and the solid-state.<\/p><p>Reference : 1. C. Huang et al. <i>J. Org. Chem.<\/i> 2011, <b>76<\/b>, 2386 \/\u00a02. P. Osswald et al. <i>J. Am. Chem. Soc<\/i>. 2007, <b>129<\/b>, 14319 \/\u00a03. P. Spenst et al. <i>J. Photochem. Photobiol. C<\/i> 2017, <b>31<\/b>, 114 \/\u00a04. S. E. Penty et al. <i>J. Am. Chem. Soc.<\/i> 2022, 144, <b>27<\/b>, 12290 \/\u00a05. S. E. Penty et al. <i>J. Am. Chem. Soc.<\/i> 2024, 146, 5470 \/\u00a06. Hartmann et al. <i>ACIE<\/i> 2025, e202501122 \/\u00a07. Hartmann et al. <i>ACIE<\/i> 2026, 10.1002\/anie.202520567<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6f5f5ec elementor-widget elementor-widget-image\" data-id=\"6f5f5ec\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"944\" height=\"287\" src=\"https:\/\/lumomat.fr\/wp-content\/uploads\/2026\/04\/Schema-Abstract-Timothy-Barendt.png\" class=\"attachment-large size-large wp-image-9867\" alt=\"\" srcset=\"https:\/\/lumomat.fr\/wp-content\/uploads\/2026\/04\/Schema-Abstract-Timothy-Barendt.png 944w, https:\/\/lumomat.fr\/wp-content\/uploads\/2026\/04\/Schema-Abstract-Timothy-Barendt-300x91.png 300w, https:\/\/lumomat.fr\/wp-content\/uploads\/2026\/04\/Schema-Abstract-Timothy-Barendt-768x233.png 768w, https:\/\/lumomat.fr\/wp-content\/uploads\/2026\/04\/Schema-Abstract-Timothy-Barendt-18x5.png 18w\" sizes=\"(max-width: 944px) 100vw, 944px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-0198135 e-flex e-con-boxed e-con e-parent\" data-id=\"0198135\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-e2272f8 elementor-widget elementor-widget-heading\" data-id=\"e2272f8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Doctorants et doctorantes : Valorisez vos travaux !<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-899c83e elementor-widget elementor-widget-text-editor\" data-id=\"899c83e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><a href=\"https:\/\/evenement.univ-angers.fr\/journee-scientifique-lumomat-nantes-2026\/register\">Inscrivez-vous d\u00e8s maintenant<\/a> pour participer \u00e0 la session posters.<\/p><p>Si vous candidatez \u00e9galement pour une communication orale, merci de d\u00e9poser votre abstract directement via le formulaire d&rsquo;inscription. La date limite de soumission des r\u00e9sum\u00e9s est fix\u00e9e au 24 Avril 2026.<\/p><p><!-- notionvc: d18a0c97-2e10-409c-8bc4-f0dc7a9ab563 --><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-02af31c e-flex e-con-boxed e-con e-parent\" data-id=\"02af31c\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-7d0e8c4 elementor-widget elementor-widget-heading\" data-id=\"7d0e8c4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Modalit\u00e9s d'inscription<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3e7292b elementor-widget elementor-widget-text-editor\" data-id=\"3e7292b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><a href=\"https:\/\/evenement.univ-angers.fr\/journee-scientifique-lumomat-nantes-2026\/register\">L&rsquo;inscription est obligatoire pour toutes et tous.<\/a> Pour les doctorants et doctorantes d\u00e9sirant pr\u00e9senter un poster, vous devez simplement l&rsquo;indiquer lors de votre inscription. Le d\u00e9p\u00f4t d&rsquo;un abstract est quant \u00e0 lui r\u00e9serv\u00e9 exclusivement aux candidats souhaitant effectuer une communication orale.<\/p><p>\ud83d\udcdc <strong>Inscriptions :<\/strong> jusqu&rsquo;au Vendredi 24 Avril 2026 <br \/>\u23f0 <strong>Deadline pour le d\u00e9p\u00f4t des abstracts :<\/strong> jusqu&rsquo;au Vendredi 24 Avril 2026<\/p><p><!-- notionvc: 9082a3f9-6553-490f-904e-6fb3740698a7 --><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>4e \u00e9dition de la Journ\u00e9e Scientifique Lumomat L&rsquo;\u00c9cole Universitaire de Recherche Lumomat a la plaisir de vous inviter \u00e0 sa 4\u00e8me\u00a0Journ\u00e9e Scientifique qui se d\u00e9roulera le Mercredi 20 Mai 2026\u00a0\u00e0 Nantes. \ud83d\udcc6 Programme de la journ\u00e9e 4 conf\u00e9rences pl\u00e9ni\u00e8res anim\u00e9es par des chercheurs et chercheuses internationaux. Des communications orales des doctorantes et doctorants du r\u00e9seau [&hellip;]<\/p>\n","protected":false},"author":7,"featured_media":9344,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-9387","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Journ\u00e9e Scientifique Lumomat 20 Mai 2026 \u00e0 Nantes : inscrivez-vous ! 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