{"id":55600,"date":"2018-03-09T22:43:19","date_gmt":"2018-03-09T22:43:19","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/catalitzadors-de-meta-tesi-recuperables-per-formacio-de-materials-orga-nico-inorga-nics\/"},"modified":"2018-03-09T22:43:19","modified_gmt":"2018-03-09T22:43:19","slug":"catalitzadors-de-meta-tesi-recuperables-per-formacio-de-materials-orga-nico-inorga-nics","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/quimica-organica\/catalitzadors-de-meta-tesi-recuperables-per-formacio-de-materials-orga-nico-inorga-nics\/","title":{"rendered":"Catalitzadors de met\u00c1\u00a0tesi recuperables per formaci\u00f3 de materials org\u00c1\u00a0nico-inorg\u00c1\u00a0nics"},"content":{"rendered":"<h2>Tesis doctoral de <strong>  Elias I Pera Xavier <\/strong><\/h2>\n<p>Las reacciones de met\u00e1tesis de dienos y de eninos catalizadas por especies carb\u00e9nicas de rutenio constituyen poderosas herramientas ampliamente utilizadas por los qu\u00edmicos org\u00e1nicos para la s\u00edntesis de una gran diversidad de productos. La importancia de la reacci\u00f3n de met\u00e1tesis se ha puesto de manifiesto en la concesi\u00f3n del premio nobel de qu\u00edmica 2005 a chauvin, grubbs y schrock. La b\u00fasqueda de catalizadores m\u00e1s estables y activos y la preparaci\u00f3n de catalizadores reciclables han merecido los esfuerzos de un gran n\u00famero de grupos en los \u00faltimos a\u00f1os. Grubbs y hoveyda han introducido carbenos n-heteroc\u00edclicos (nhc) y ligandos estir\u00e9nicos quelatantes para la mejora de los sistemas catal\u00edticos. una de las estrategias utilizadas para la recuperaci\u00f3n y reciclaje de estos sistemas catal\u00edticos es el anclaje de la especie homog\u00e9nea a un soporte polim\u00e9rico insoluble, siendo los pol\u00edmeros org\u00e1nicos los m\u00e1s comunes. Dentro de los inorg\u00e1nicos los trabajos son menos numerosos y corresponden al anclaje a s\u00edlicas comerciales, a sistemas monol\u00edticos o a s\u00edlicas mesoestructuradas. La mayor estabilidad t\u00e9rmica, qu\u00edmica y mec\u00e1nica de los pol\u00edmeros inorg\u00e1nicos y sus elevadas \u00e1reas superficiales los hacen alternativas atractivas para la incorporaci\u00f3n covalente de ligandos org\u00e1nicos y complejos met\u00e1licos. Como alternativa al anclaje, la parte org\u00e1nica puede incorporarse a la matriz inorg\u00e1nica mediante el proceso sol-gel, ya sea por cogelificaci\u00f3n de un organotrialcoxisilano con tetraetoxisilano o bien por hidr\u00f3lisis y policondensaci\u00f3n de precursores org\u00e1nicos que posean dos o m\u00e1s funciones trialcoxisililo. Los h\u00edbridos org\u00e1nico-inorg\u00e1nicos derivados de s\u00edlice obtenidos por sol-gel han experimentado un gran auge en la \u00faltima d\u00e9cada, con el desarrollo de sistemas organizados en presencia de tensioactivos. Su utilizaci\u00f3n en el campo de la cat\u00e1lisis ha sido a\u00fan relativamente poco explotada. en la presente tesis doctoral se han sintetiz<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Catalitzadors de met\u00c1\u00a0tesi recuperables per formaci\u00f3 de materials org\u00c1\u00a0nico-inorg\u00c1\u00a0nics<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Catalitzadors de met\u00c1\u00a0tesi recuperables per formaci\u00f3 de materials org\u00c1\u00a0nico-inorg\u00c1\u00a0nics <\/li>\n<li><strong>Autor:<\/strong>\u00a0  Elias I Pera Xavier <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Aut\u00f3noma de barcelona<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 21\/11\/2006<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Direcci\u00f3n y tribunal<\/h3>\n<ul>\n<li><strong>Director de la tesis<\/strong>\n<ul>\n<li>Roser Pleixats Rovira<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: jaume Vilarrasa llorens <\/li>\n<li>rosa Mar\u00eda Ortu\u00f1o mingarro (vocal)<\/li>\n<li>josep Bonjoch sese (vocal)<\/li>\n<li>hermenegildo Garc\u00eda g\u00f3mez (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Elias I Pera Xavier Las reacciones de met\u00e1tesis de dienos y de eninos catalizadas por especies carb\u00e9nicas [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","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":"","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":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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