{"id":21763,"date":"2016-03-03T07:00:47","date_gmt":"2016-03-03T07:00:47","guid":{"rendered":"http:\/\/ibecbarcelona.eu\/?p=21763"},"modified":"2016-03-03T08:05:42","modified_gmt":"2016-03-03T08:05:42","slug":"cientifics-de-libec-i-de-la-ub-resolen-un-antic-enigma-quimic","status":"publish","type":"post","link":"https:\/\/ibecbarcelona.eu\/ca\/cientifics-de-libec-i-de-la-ub-resolen-un-antic-enigma-quimic\/","title":{"rendered":"Cient\u00edfics de l’IBEC i de la UB resolen un antic enigma qu\u00edmic"},"content":{"rendered":"

“La teoria suggereix que moltes reaccions qu\u00edmiques, -i no nom\u00e9s reaccions redox (reaccions de transfer\u00e8ncia d’electrons), com sovint es pensa- podrien ser catalitzades mitjan\u00e7ant l’aplicaci\u00f3 d’un camp el\u00e8ctric”, diu Ismael D\u00edez-P\u00e9rez, investigador s\u00e8nior a l’ IBEC i professor ajudant a la Universitat de Barcelona, qui va dirigir l’estudi que s’ha publicat avui en la revista Nature. “Hem proporcionat per primera vegada evid\u00e8ncia experimental d’aquest succ\u00e9s”. <\/p>\n

Poder catalitzar reaccions qu\u00edmiques \u00e9s essencial, ja que d’aquesta manera s’accelera la reacci\u00f3, i per tant, s’aconsegueix que siguin m\u00e9s prol\u00edfiques i econ\u00f2miques en les seves m\u00faltiples aplicacions. La cat\u00e0lisi electrost\u00e0tica (utilitzant camps el\u00e8ctrics) \u00e9s la forma menys desenvolupada de la cat\u00e0lisi en la qu\u00edmica sint\u00e8tica, perqu\u00e8 els efectes electrost\u00e0tics poden ser fortament direccionals. Els investigadors a Espanya i Austr\u00e0lia van resoldre aquest problema mitjan\u00e7ant l’\u00fas de t\u00e8cniques innovadores basades en microsc\u00f2pia d’efecte t\u00fanel.<\/p>\n

\u201cEl nostre microscopi STM modificat ens permet la captura directe de mol\u00e8cules individuals que reaccionen”, diu Albert C. Aragon\u00e8s, estudiant de doctorat a l’IBEC i la UB i primer autor de l’estudi.<\/p>\n

\u201cMitjan\u00e7ant el control de l’orientaci\u00f3 de les mol\u00e8cules en relaci\u00f3 amb el camp el\u00e8ctric, hem accelerat una reacci\u00f3 no-redox per primera vegada\u201d, afegeix Ismael.<\/p>\n

“L’\u00fas de camps el\u00e8ctrics externs com a “catalitzador”, implica que es pot aconseguir la s\u00edntesi de mol\u00e8cules que d’una altra manera no podrien dur-se a terme de manera rentable en el laboratori o en grans instal\u00b7lacions industrials”, agrega Nadim Darwish, investigador Maire-Curie a l’IBEC i a la UB. “Aix\u00f2 obre les portes cap a la nova tecnologia qu\u00edmica”.<\/p>\n

—<\/p>\n

Source paper:<\/strong> <\/em>Albert C. Aragon\u00e8s, Naomi L. Haworth, Nadim Darwish, Simone Ciampi, Nathaniel J. Bloomfield, Gordon G. Wallace, Ismael Diez-Perez & Michelle L. Coote (2016). Electrostatic catalysis of a Diels\u2013Alder reaction<\/a>, Nature <\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

\"Nature<\/a>Aquesta imatge mostra la primera cat\u00e0lisi d’una reacci\u00f3 qu\u00edmica mitjan\u00e7ant un camp el\u00e8ctric, aix\u00f2 podria revolucionar la manera en la qual produ\u00efm productes qu\u00edmics per a aplicacions en la vida quotidiana.<\/h3>\n

Investigadors de l’Institut de Bioenginyeria de Catalunya (IBEC), la Universitat de Barcelona (UB) i dues universitats a Austr\u00e0lia han introdu\u00eft una nova forma de catalitzar (accelerar) reaccions qu\u00edmiques mitjan\u00e7ant l’aplicaci\u00f3 d’un camp el\u00e8ctric entre les mol\u00e8cules reaccionants. Aix\u00f2 obre la porta a la fabricaci\u00f3 de compostos qu\u00edmics utilitzats habitualment en medicaments i materials industrials, d’una manera m\u00e9s r\u00e0pida i econ\u00f2mica. <\/p>\n

La reacci\u00f3 estudiada va ser una reacci\u00f3 cl\u00e0ssica, Diels-Alder, que es va dur a terme entre dos nano-el\u00e8ctrodes contenint les mol\u00e8cules reactives i sota un camp el\u00e8ctric orientat en tots dos.<\/p>\n","protected":false},"author":4,"featured_media":21754,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[96],"tags":[],"post_formats":[],"class_list":["post-21763","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-noticies-de-recerca"],"yoast_head":"\nCient\u00edfics de l'IBEC i de la UB resolen un antic enigma qu\u00edmic - Institute for Bioengineering of Catalonia<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/ibecbarcelona.eu\/ca\/cientifics-de-libec-i-de-la-ub-resolen-un-antic-enigma-quimic\/\" \/>\n<meta property=\"og:locale\" content=\"ca_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Cient\u00edfics de l'IBEC i de la UB resolen un antic enigma qu\u00edmic - Institute for Bioengineering of Catalonia\" \/>\n<meta property=\"og:description\" content=\"Aquesta imatge mostra la primera cat\u00e0lisi d'una reacci\u00f3 qu\u00edmica mitjan\u00e7ant un camp el\u00e8ctric, aix\u00f2 podria revolucionar la manera en la qual produ\u00efm productes qu\u00edmics per a aplicacions en la vida quotidiana. Investigadors de l'Institut de Bioenginyeria de Catalunya (IBEC), la Universitat de Barcelona (UB) i dues universitats a Austr\u00e0lia han introdu\u00eft una nova forma de catalitzar (accelerar) reaccions qu\u00edmiques mitjan\u00e7ant l'aplicaci\u00f3 d'un camp el\u00e8ctric entre les mol\u00e8cules reaccionants. Aix\u00f2 obre la porta a la fabricaci\u00f3 de compostos qu\u00edmics utilitzats habitualment en medicaments i materials industrials, d'una manera m\u00e9s r\u00e0pida i econ\u00f2mica. 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