Metal-cation arrangement control in secondary building units of metal-organic frameworks and their translation to oxides
Metal-organic frameworks (MOFs) are crystalline, porous materials composed of an organic part, denoted linker, and an inorganic part, which can be a metal cation or cluster, known in reticular chemistry as secondary building unit (SBU). The combination of different SBUs and linkers results in period...
| Autor: | |
|---|---|
| Tipo de recurso: | tesis doctoral |
| Fecha de publicación: | 2019 |
| País: | España |
| Institución: | Universidad Complutense de Madrid (UCM) |
| Repositorio: | Docta Complutense |
| Idioma: | inglés |
| OAI Identifier: | oai:docta.ucm.es:20.500.14352/17249 |
| Acceso en línea: | https://hdl.handle.net/20.500.14352/17249 |
| Access Level: | acceso abierto |
| Palabra clave: | 547(043.2) Organic chemistry Química orgánica Química orgánica (Química) 2306 Química Orgánica |
| Sumario: | Metal-organic frameworks (MOFs) are crystalline, porous materials composed of an organic part, denoted linker, and an inorganic part, which can be a metal cation or cluster, known in reticular chemistry as secondary building unit (SBU). The combination of different SBUs and linkers results in periodic structures with permanent porosity and different topologies, which are useful in many applications. The choice of metal cation is key in determining the resulting MOF structural features, as well as in their resulting physical and chemical properties. Recent advances have appeared regarding the incorporation of mixtures of different metal cations within a given SBU, with the aim of modulating the properties of these materials. For instance, it has been demonstrated the introduction of multiple rare-earth elements for the obtaining of luminescent materials for thermometry, or the combination of various p elements for the tuning of the catalytic activity of MOFs in multicomponent reactions. There are different synthetic strategies to accomplish this: use of metaloligands, post-synthetic metal exchange, and one pot synthesis combining different metal precursors during the synthetic procedure. In this case, the incorporation of the various metal elements in the crystallographic sites generally takes place randomly, resulting in doped materials, or solid solution MOFs. The novelty of this thesis lies on the development of the ability to incorporate multiple metal cations in an ordered and addressable manner, which results for the first-time in programming metal-cation sequenced SBUs to form MOFs, and their translation to other types of materials. Thus, the work presented in this thesis is focused in increasing the level of complexity in reticular chemistry, being able to control the order and arrangement of different metal cations within the SBUs... |
|---|