{"id":111681,"date":"2011-04-11T00:00:00","date_gmt":"2011-04-11T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/new-alkaline-earth-polymeric-frameworks-as-green-materials-for-sorption-and-heterogeneous-catalysis\/"},"modified":"2011-04-11T00:00:00","modified_gmt":"2011-04-11T00:00:00","slug":"new-alkaline-earth-polymeric-frameworks-as-green-materials-for-sorption-and-heterogeneous-catalysis","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/new-alkaline-earth-polymeric-frameworks-as-green-materials-for-sorption-and-heterogeneous-catalysis\/","title":{"rendered":"New alkaline-earth polymeric frameworks as green materials for sorption and heterogeneous catalysis"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Ana Eva Platero Prats <\/strong><\/h2>\n<p>Metal-organic frameworks (or mofs) are  porous  organic-inorganic  crystalline materials in which the metallic centers are joined through organic ligands via coordination bonds to give frameworks with different dimensionalities. Thus, through  the wide choice of metals, and the unlimited choice and design of ligands, a broad range  of  properties (magnetic, electric, optical, and catalytic, among others) might be  rationally incorporated into such materials. the increasing number of mofs reported in the last years has offered a rich  variety of new structural types to materials science. In this sense, crystallography has  played an important role, not only in the structure determination of novel materials, but  also in the process of finding consistent strategies to classify them, then to point out  possible structural tendencies and, as a result of the former, to possibly predict  structures in the design of new materials. In this context, the role of new topological  approaches in the crystal chemistry is becoming more and more important. the work presented in this thesis is focused on the obtaining of new mofs  using  alkaline-earth  elements as metal centers.  The use of alkaline-earth metals to  synthesize new mofs  remains  a scientific challenge, mainly due to  the inherent  difficulties concerning their formation\/crystallization  and the variable coordination  environments  that these elements exhibit.  In spite of all this,  the development of  alkaline-earth mofs could represent a comparatively cheap, nontoxic and green  alternative to conventional mofs. concerning the organic ligands used in this work,  two  different  ligand functionalities have been evaluated: carboxylate and sulfonate groups. with regard to carboxylate ligands,  flexible dipodal linkers have been  considered to obtain new alkaline-earth mofs. The used  linker 4,4\u00c2\u00bf- hexafluoroisopropylidene)bis(benzoic) acid (h2l(1))  has been  utilized  before  in our  research group  to synthesize  both  transition metals and rare-earth  elements  mofs.  these previous studies have shown that this flexibility can induce interesting materials  phenomena like polymorphism, as well as the formation of a wide variety of networks  with unexpected topologies. Continuing in this way, the role that play nonbinding \u00c2\u00bfcf3  groups  present in  h2l(1) in the formation of  some selected frameworks has been  studied, compared to its counterpart with nonbinding  \u00c2\u00bfh groups (diphenylmethane- 4,4\u00c2\u00bf-dicarboxylic acid,  h2l(2)).  It is worth highlighting that most of the materials  obtained using these linkers have shown a good performance as heterogeneous catalysts  in hydrogenation and hydrosilylation reactions under mild conditions. In addition, a  flexible calcium mof with selective sorption properties (both in liquid and gas phases)  has been obtained  using  h2l(1) . This material  exhibits  a reversible phase transition  related to the remove\/uptake of guest molecules that has been studied in detail. These  results are presented in chapter 4. continuing with the flexible dicarboxylate h2l(1)  ligand, in the case of mg, an exhaustive study was performed to elucidate the effect of  the introduction of  nitrogenated  chelating  ancillary ligands  in  the formation of different supramolecular  frameworks. Additionally, computational studies were performed to show the relative  energy for the five obtained networks, allowing a better understanding of the processes  that govern the formation of these mg mofs. These results are presented in chapter 5. finally, the other part of this work is based on the use of an  anthraquinone  derivate of disulfonate ligand (anthraquinone-2,6-disulfonate, 2,6-aqds) to obtain new  alkaline-earth mofs.  This  rigid  disulfonate linker has been  before  proved in our  research group to be  a suitable linker to  obtain materials with high thermal stability. moreover, as sulfonate groups can exhibit a wide variety of coordination modes, the use  of this ligand can also lead to  the formation of  different alkaline-earth coordination  environments.  In this sense,  novel  materials with mg, ca, sr and ba have been  successfully synthesized and tested as heterogeneous catalysts in hydrogenation and  hydrosilylation reactions. These results are presented in chapter 6.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>New alkaline-earth polymeric frameworks as green materials for sorption and heterogeneous catalysis<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 New alkaline-earth polymeric frameworks as green materials for sorption and heterogeneous catalysis <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Ana Eva Platero Prats <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Aut\u00f3noma de Madrid<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 04\/11\/2011<\/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>Enrique Gutierrez Puebla<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Santiago Alvarez reverte <\/li>\n<li>mart\u00edn Mart\u00ednez ripoll (vocal)<\/li>\n<li>Santiago Garcia granda (vocal)<\/li>\n<li>xiaodong Zou (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Ana Eva Platero Prats Metal-organic frameworks (or mofs) are porous organic-inorganic crystalline materials in which the metallic [&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 center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[222449,65396,12951,1119,25428,222450],"class_list":["post-111681","post","type-post","status-publish","format-standard","hentry","category-sin-categoria","tag-ana-eva-platero-prats","tag-enrique-gutierrez-puebla","tag-martin-Martinez-ripoll","tag-santiago-alvarez-reverte","tag-santiago-garcia-granda","tag-xiaodong-zou"],"_links":{"self":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts\/111681","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/comments?post=111681"}],"version-history":[{"count":0,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts\/111681\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/media?parent=111681"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/categories?post=111681"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/tags?post=111681"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}