{"id":322,"date":"2021-07-15T10:06:34","date_gmt":"2021-07-15T08:06:34","guid":{"rendered":"https:\/\/perso.ens-lyon.fr\/denis.frath\/?p=322"},"modified":"2022-10-25T13:15:39","modified_gmt":"2022-10-25T11:15:39","slug":"dual-state-emissive-%cf%80-extended-salicylaldehyde-fluorophores-synthesis-photophysical-properties-and-first-principle-calculations","status":"publish","type":"post","link":"https:\/\/perso.ens-lyon.fr\/denis.frath\/2021\/07\/15\/dual-state-emissive-%cf%80-extended-salicylaldehyde-fluorophores-synthesis-photophysical-properties-and-first-principle-calculations\/","title":{"rendered":"Dual-State Emissive \u03c0-Extended Salicylaldehyde Fluorophores: Synthesis, Photophysical Properties and First-Principle Calculations"},"content":{"rendered":"<p style=\"text-align: left;\">Our article is available to read at <a href=\"https:\/\/chemistry-europe.onlinelibrary.wiley.com\/doi\/10.1002\/ejoc.202100650\" target=\"_blank\" rel=\"noreferrer noopener\">Eur. J. Org. Chem.<\/a><\/p>\n<p><a href=\"https:\/\/chemistry-europe.onlinelibrary.wiley.com\/doi\/10.1002\/ejoc.202100650\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-323 alignleft\" src=\"https:\/\/perso.ens-lyon.fr\/denis.frath\/wp-content\/uploads\/2021\/07\/TOC-300x173.png\" alt=\"\" width=\"300\" height=\"173\" srcset=\"https:\/\/perso.ens-lyon.fr\/denis.frath\/wp-content\/uploads\/2021\/07\/TOC-300x173.png 300w, https:\/\/perso.ens-lyon.fr\/denis.frath\/wp-content\/uploads\/2021\/07\/TOC.png 656w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a>The search for simple, low-cost, versatile, easily accessible, stimuli-responsive, highly emissive molecular fluorophores emitting both in solution and in the solid-state has prompted us to investigate the optical properties of a series of synthetically accessible salicylaldehyde derivatives possessing a \u03c0-conjugated moiety at their 4-position. These dyes are mainly known as synthetic intermediates but can also display sizeable Excited-State Intramolecular Proton Transfer (ESIPT) fluorescence owing to the presence of a 6-membered H-bonded ring in their structure. The photophysical properties of these compounds have been studied in solution (multiple solvents) and in the solid-state, as doped in PMMA films, KBr pellets or as powders leading to the observation of a pronounced fluorosolvatochromism. Emission wavelengths in the range 400\u2013654\u2005nm, along with photoluminescence quantum yields up to 76\u2009% were recorded. Modification of the spacer (ethynyl, vinyl or direct connection) involved the \u03c0-delocalization triggers major differences in terms of maximum emission wavelength and fluorescence quantum yields in the various media studied. All photophysical observations are rationalized by first-principle calculations.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Our article is available to read at Eur. J. Org. Chem. The search for simple, low-cost, versatile, easily accessible, stimuli-responsive, highly emissive molecular fluorophores emitting both in solution and in the solid-state has prompted us to investigate the optical properties of a series of synthetically accessible salicylaldehyde derivatives possessing a \u03c0-conjugated moiety at their 4-position. [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[],"class_list":["post-322","post","type-post","status-publish","format-standard","hentry","category-article"],"_links":{"self":[{"href":"https:\/\/perso.ens-lyon.fr\/denis.frath\/wp-json\/wp\/v2\/posts\/322","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/perso.ens-lyon.fr\/denis.frath\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/perso.ens-lyon.fr\/denis.frath\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/perso.ens-lyon.fr\/denis.frath\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/perso.ens-lyon.fr\/denis.frath\/wp-json\/wp\/v2\/comments?post=322"}],"version-history":[{"count":2,"href":"https:\/\/perso.ens-lyon.fr\/denis.frath\/wp-json\/wp\/v2\/posts\/322\/revisions"}],"predecessor-version":[{"id":325,"href":"https:\/\/perso.ens-lyon.fr\/denis.frath\/wp-json\/wp\/v2\/posts\/322\/revisions\/325"}],"wp:attachment":[{"href":"https:\/\/perso.ens-lyon.fr\/denis.frath\/wp-json\/wp\/v2\/media?parent=322"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/perso.ens-lyon.fr\/denis.frath\/wp-json\/wp\/v2\/categories?post=322"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/perso.ens-lyon.fr\/denis.frath\/wp-json\/wp\/v2\/tags?post=322"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}