{"id":137903,"date":"2025-08-26T08:20:00","date_gmt":"2025-08-26T06:20:00","guid":{"rendered":"https:\/\/www.immo-invest.ch\/?p=137903"},"modified":"2025-08-25T14:27:04","modified_gmt":"2025-08-25T12:27:04","slug":"neue-silizium-saeuren-koennten-ewige-chemikalien-zerstoeren","status":"publish","type":"post","link":"https:\/\/www.immo-invest.ch\/fr\/neue-silizium-saeuren-koennten-ewige-chemikalien-zerstoeren\/","title":{"rendered":"De nouveaux acides de silicium pourraient d\u00e9truire les \u00ab\u00a0produits chimiques \u00e9ternels"},"content":{"rendered":"\n\n<p class=\"wp-block-paragraph\">Les substances per- et polyfluoroalkyl\u00e9es, ou PFAS, sont consid\u00e9r\u00e9es comme des \u00ab\u00a0produits chimiques \u00e9ternels\u00a0\u00bb, car elles ne se d\u00e9gradent pas dans l&rsquo;environnement. Leur liaison carbone-fluor tr\u00e8s stable r\u00e9siste \u00e0 la lumi\u00e8re, \u00e0 l&rsquo;eau et aux micro-organismes. Les acides super Lewis r\u00e9cemment d\u00e9velopp\u00e9s interviennent pr\u00e9cis\u00e9ment \u00e0 ce niveau. Ils font preuve d&rsquo;une \u00ab\u00a0avidit\u00e9 d&rsquo;\u00e9lectrons\u00a0\u00bb extr\u00eame et attaquent directement les structures r\u00e9sistantes des PFAS.<\/p>\n\n\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Une fabrication complexe pour un impact important<br><\/strong>Pendant longtemps, ces compos\u00e9s n&rsquo;\u00e9taient consid\u00e9r\u00e9s que comme un concept th\u00e9orique. Ce n&rsquo;est que gr\u00e2ce \u00e0 des m\u00e9thodes innovantes telles que la protolyse que l&rsquo;on a r\u00e9ussi \u00e0 les produire de mani\u00e8re synth\u00e9tique. Pour ce faire, des processus \u00e9prouv\u00e9s de la chimie du carbone ont \u00e9t\u00e9 appliqu\u00e9s au silicium. Les exp\u00e9riences \u00e9taient tr\u00e8s sensibles. Elles devaient \u00eatre men\u00e9es sous atmosph\u00e8re protectrice, car la moindre trace d&rsquo;oxyg\u00e8ne ou d&rsquo;eau emp\u00eacherait les r\u00e9actions de se produire.<\/p>\n\n\n\n\n\n<p class=\"wp-block-paragraph\"><strong>La m\u00e9canique quantique fournit la cl\u00e9<br><\/strong>Pour la premi\u00e8re fois, la force de ces mol\u00e9cules a \u00e9t\u00e9 enti\u00e8rement pr\u00e9dite par la m\u00e9canique quantique. Ces calculs ont non seulement confirm\u00e9 leur extr\u00eame r\u00e9activit\u00e9, mais ont \u00e9galement permis de comprendre pr\u00e9cis\u00e9ment les m\u00e9canismes en jeu. Des m\u00e9thodes spectroscopiques telles que la RMN ont valid\u00e9 les pr\u00e9dictions. La combinaison de la th\u00e9orie et de l&rsquo;exp\u00e9rience constitue ainsi une \u00e9tape importante dans la recherche sur les catalyseurs.<\/p>\n\n\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Des catalyseurs pour la protection de l&rsquo;environnement<br><\/strong>Les nouveaux acides super Lewis se comportent comme des catalyseurs. Ils se modifient au cours de la r\u00e9action, mais se r\u00e9g\u00e9n\u00e8rent et ne sont pas consomm\u00e9s de mani\u00e8re permanente. Des quantit\u00e9s infimes suffisent donc \u00e0 rendre inoffensifs les compos\u00e9s PFAS hautement toxiques&#8230; Un avantage d\u00e9cisif par rapport aux approches pr\u00e9c\u00e9dentes.<\/p>\n\n\n\n\n\n<p class=\"wp-block-paragraph\">Avec les acides super Lewis \u00e0 base de silicium, une solution r\u00e9aliste au probl\u00e8me mondial des PFAS est pour la premi\u00e8re fois \u00e0 port\u00e9e de main. Ils pourraient devenir un outil cl\u00e9 pour le recyclage, la chimie verte et la protection de l&rsquo;environnement et de la sant\u00e9.<\/p>\n\n","protected":false},"excerpt":{"rendered":"<p>Des chercheurs de l&rsquo;Universit\u00e9 technique de Berlin ont r\u00e9ussi une perc\u00e9e : Ils ont d\u00e9velopp\u00e9 une nouvelle classe d&rsquo;acides super Lewis \u00e0 base de silicium, capables de d\u00e9composer m\u00eame des compos\u00e9s extr\u00eamement stables comme le PFAS. Cela ouvre des perspectives pour la chimie verte, les processus de recyclage et la d\u00e9gradation de polluants tr\u00e8s dangereux.<\/p>\n","protected":false},"author":2,"featured_media":137898,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_surecart_dashboard_logo_width":"180px","_surecart_dashboard_show_logo":true,"_surecart_dashboard_navigation_orders":true,"_surecart_dashboard_navigation_invoices":true,"_surecart_dashboard_navigation_subscriptions":true,"_surecart_dashboard_navigation_downloads":true,"_surecart_dashboard_navigation_billing":true,"_surecart_dashboard_navigation_account":true,"inline_featured_image":false,"_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[22699,8747,22353,743,22438],"tags":[54171,872,3931,2002,50491,54172],"class_list":["post-137903","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-durabilite","category-energie","category-international-fr","category-immonews-fr","category-trends-fr","tag-gruene-chemie-fr","tag-immoinvest-fr","tag-immonews-fr","tag-news-fr","tag-pfas-2-fr","tag-super-lewis-saeuren-fr"],"acf":{"bild_mit_ki_erstellt_worden":[],"lead":"Des chercheurs de l'Universit\u00e9 technique de Berlin ont r\u00e9ussi une perc\u00e9e : Ils ont d\u00e9velopp\u00e9 une nouvelle classe d'acides super Lewis \u00e0 base de silicium, capables de d\u00e9composer m\u00eame des compos\u00e9s extr\u00eamement stables comme le PFAS. Cela ouvre des perspectives pour la chimie verte, les processus de recyclage et la d\u00e9gradation de polluants tr\u00e8s dangereux.","autor":"Quelle TU Berlin","ort":"","bildunterschrift":"","zusammenfassung":"","bild_im_grid":false,"gallerie":"","newsim":""},"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"Des chercheurs de l&#039;Universit\u00e9 technique de Berlin ont r\u00e9ussi une perc\u00e9e : Ils ont d\u00e9velopp\u00e9 une nouvelle classe d&#039;acides super Lewis \u00e0 base de silicium, capables de d\u00e9composer m\u00eame des compos\u00e9s extr\u00eamement stables comme le PFAS. 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