{"id":12118,"date":"2001-10-07T00:00:00","date_gmt":"2001-10-07T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/dinamica-de-la-transferencia-protonica-intermolecular-comportamiento-fotoacido-e-siomeria-rotacional-en-el-cation-n-h-6-hidroxiquinolinio-y-derivados\/"},"modified":"2001-10-07T00:00:00","modified_gmt":"2001-10-07T00:00:00","slug":"dinamica-de-la-transferencia-protonica-intermolecular-comportamiento-fotoacido-e-siomeria-rotacional-en-el-cation-n-h-6-hidroxiquinolinio-y-derivados","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/fisica\/dinamica-de-la-transferencia-protonica-intermolecular-comportamiento-fotoacido-e-siomeria-rotacional-en-el-cation-n-h-6-hidroxiquinolinio-y-derivados\/","title":{"rendered":"Dinamica de la transferencia prot\u00f3nica intermolecular.  comportamiento fotoacido e siomeria rotacional en el cation n-h-6-hidroxiquinolinio y derivados"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Jos\u00e9 Luis P\u00e9rez Lustres <\/strong><\/h2>\n<p>Las reacciones de transferencia prot\u00f3nica al disolvente pueden ocurrir, para sustancias de acidez suficientemente alta, en escalas de tiempos similares a los tiempos de relajaci\u00f3n de debye. En disolventes pr\u00f3ticos de baja viscosidad y a temperatura ambiente los tiempos de relajaci\u00f3n de debye son del orden de unas decenas de picosegundos. Debido a su rapidez es complicado desentra\u00f1ar los elementos constituyentes de este tipo de reacciones. Por ello hemos elegido introducir una sustancia foto\u00e1cida en un disolvente no aceptor de protones y a\u00f1adir peque\u00f1as cantidades de una sustancia foto\u00e1cida y la sustancia aceptora, retrasando asi lo fotodisociaci\u00f3n hasta la escala de tiempos del nanosegundo. Este tipo de sistemas presentan dos ventajas importantes: en primer lugar, la reacci\u00f3n de fotodisociaci\u00f3n puede iniciarse con un pulso de luz, y en segundo lugar, podemos observar c\u00f3mo transcurre la fotodisociaci\u00f3n paso a paso sin la influencia de efectos estructurales del disolvente.  como sustancia foto\u00e1cida hemos elegido el cati\u00f3n n-h-6-hidroxiquinolino (6hhq) cuyo pka tiene un valor de 7 en su estado electr\u00f3nico fundamental y alcanza un valor de -4 en su primer estado excitado singlete (s1). En acetonitrilo y diclorometano se observa que la fotodisociaci\u00f3n asistida por bases hidroxiladas en el estado s1 de la sonda foto\u00e1cida 6hhq transcurre mediante un mecanismo complejo que implica la formaci\u00f3n de un aducto por puente de hidr\u00f3geno de estequiometr\u00eda 1:1 entre la sonda 6hhq y la base y requiere de la participaci\u00f3n de al menos 2 moleculas de base. La validez de este mecanismo se ha comprobado para las bases hidroxiladas agua, metanol, etanol y n-propanol.  paralelamente al estudio de la fotodisociaci\u00f3n hemos realizado un estudio conformacional de la sonda 6hhq apoy\u00e1ndonos en los resultados obtenidos mediante espectroscopias de fluorescencia y de absorci\u00f3n uv-vis de la sonda cati\u00f3nica n-metil-6-metoxiquinolinio (6mmq). Media<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Dinamica de la transferencia prot\u00f3nica intermolecular.  comportamiento fotoacido e siomeria rotacional en el cation n-h-6-hidroxiquinolinio y derivados<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Dinamica de la transferencia prot\u00f3nica intermolecular.  comportamiento fotoacido e siomeria rotacional en el cation n-h-6-hidroxiquinolinio y derivados <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Jos\u00e9 Luis P\u00e9rez Lustres <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Santiago de compostela<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 10\/07\/2001<\/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>Mar\u00eda Flor Rodr\u00edguez Prieto<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Miguel angel Rios fern\u00e1ndez <\/li>\n<li>Francisco Javier Luque garriga (vocal)<\/li>\n<li>Santiago Nonell marrugat (vocal)<\/li>\n<li>Fernando Lopez arbeola (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Jos\u00e9 Luis P\u00e9rez Lustres Las reacciones de transferencia prot\u00f3nica al disolvente pueden ocurrir, para sustancias de acidez [&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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