Design and Synthesis of New Systems for Photoprotection and Solar Energy Storage

Design and Synthesis of New Systems for Photoprotection and Solar Energy Storage

This PhD. Thesis is focused on the rational design and obtention of new synthetic sunscreens and molecular energy storage systems. In particular, an evaluation of their photophysical and photochemical properties and diverse structural modifications to tune them was done. The thesis is divided in di...

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Autor principal: Losantos Cabello, Raúl
Otros Autores: Campos García, Pedro José (null)
Formato: text (thesis)
Lenguaje:eng
Publicado: Universidad de La Rioja (España) 2019
Acceso en línea:https://dialnet.unirioja.es/servlet/oaites?codigo=246393
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description This PhD. Thesis is focused on the rational design and obtention of new synthetic sunscreens and molecular energy storage systems. In particular, an evaluation of their photophysical and photochemical properties and diverse structural modifications to tune them was done. The thesis is divided in different chapters. Firstly, an overview of the history of photochemistry and a brief explanation of the fundamental basis of photochemistry that will be crucial throughout this memory will be described in Chapter 1. In the second chapter a general description of UV light exposition dangers and effects are explained together with the concerns and action mechanisms of the commercial sunscreens. Moreover, the obtention and properties of natural mycosporines (MAAs) which inspired this thesis are described. In Chapter 4, a computational and synthetic design of MAA analogues is presented. The computational study clarifies the key features for photoprotection revealing a simpler scaffold which retains these skills. The development of a novel and versatile synthetic procedure allows for the synthesis of a series of analogues with proved and efficient photoprotective capabilities. In Chapter 5, it is presented a spectroscopic analysis using femtosecond temporal resolution techniques to understand the relaxation mechanisms. Also, the influence of substitution is explored by computational methods. Chapter 6 shows the preparation and characterization of other three families of UV filters together with a proposal for their deactivation mechanisms. Finally, in Chapter 7 it is described the concept of molecular solar thermal energy storage (MOST) and three distinct types of system are explored. This work mainly focuses on the catalyzed back-conversion reaction and heat release measurements, obtaining a record system and the computational exploration of the ruling mechanisms.
author2 Campos García, Pedro José (null)
author_facet Campos García, Pedro José (null)
Losantos Cabello, Raúl
format text (thesis)
author Losantos Cabello, Raúl
spellingShingle Losantos Cabello, Raúl
Design and Synthesis of New Systems for Photoprotection and Solar Energy Storage
author_sort Losantos Cabello, Raúl
title Design and Synthesis of New Systems for Photoprotection and Solar Energy Storage
title_short Design and Synthesis of New Systems for Photoprotection and Solar Energy Storage
title_full Design and Synthesis of New Systems for Photoprotection and Solar Energy Storage
title_fullStr Design and Synthesis of New Systems for Photoprotection and Solar Energy Storage
title_full_unstemmed Design and Synthesis of New Systems for Photoprotection and Solar Energy Storage
title_sort design and synthesis of new systems for photoprotection and solar energy storage
publisher Universidad de La Rioja (España)
publishDate 2019
url https://dialnet.unirioja.es/servlet/oaites?codigo=246393
work_keys_str_mv AT losantoscabelloraul designandsynthesisofnewsystemsforphotoprotectionandsolarenergystorage
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spelling oai-TES00000229202019-11-22Design and Synthesis of New Systems for Photoprotection and Solar Energy StorageLosantos Cabello, RaúlThis PhD. Thesis is focused on the rational design and obtention of new synthetic sunscreens and molecular energy storage systems. In particular, an evaluation of their photophysical and photochemical properties and diverse structural modifications to tune them was done. The thesis is divided in different chapters. Firstly, an overview of the history of photochemistry and a brief explanation of the fundamental basis of photochemistry that will be crucial throughout this memory will be described in Chapter 1. In the second chapter a general description of UV light exposition dangers and effects are explained together with the concerns and action mechanisms of the commercial sunscreens. Moreover, the obtention and properties of natural mycosporines (MAAs) which inspired this thesis are described. In Chapter 4, a computational and synthetic design of MAA analogues is presented. The computational study clarifies the key features for photoprotection revealing a simpler scaffold which retains these skills. The development of a novel and versatile synthetic procedure allows for the synthesis of a series of analogues with proved and efficient photoprotective capabilities. In Chapter 5, it is presented a spectroscopic analysis using femtosecond temporal resolution techniques to understand the relaxation mechanisms. Also, the influence of substitution is explored by computational methods. Chapter 6 shows the preparation and characterization of other three families of UV filters together with a proposal for their deactivation mechanisms. Finally, in Chapter 7 it is described the concept of molecular solar thermal energy storage (MOST) and three distinct types of system are explored. This work mainly focuses on the catalyzed back-conversion reaction and heat release measurements, obtaining a record system and the computational exploration of the ruling mechanisms.Esta tesis doctoral se centra en el diseño racional y la obtención de nuevos fotoprotectores de origen sintético y sistemas para almacenamiento de energía solar. En particular, se ha realizado la evaluación de sus propiedades fotofísicas y fotoquímicas y su ajuste a través de diversas modificaciones estructurales. La tesis se divide en diferentes capítulos. Inicialmente se da una visión general de la historia de la fotoquímica y una breve explicación de conceptos fundamentales que se usarán a lo largo de la memoria. En el segundo capítulo, se describen de manera general los peligros y efectos asociados a la exposición frente a luz UV junto con las preocupaciones y mecanismos de acción de los fotoprotectores comerciales. Además, se describen los métodos de obtención y propiedades de las micosporinas naturales (MAAs) que inspiran en gran medida este trabajo. En el capítulo 4 se presenta el diseño computacional y sintético de análogos de MAAs. Este estudio computacional aclara las características clave en la fotoprotección revelando estructuras más sencillas que mantienen estas propiedades. En el capítulo 5, se ha llevado a cabo un análisis espectroscópico por medio de técnicas con resolución temporal de femtosegundos para comprender los mecanismos de relajación. Además, la influencia de los sustituyentes se ha explorado por métodos teóricos. El capítulo 6 muestra la preparación y caracterización de otras tres familias de filtros UV junto a una propuesta sobre sus mecanismos de desactivación. Por último, en el capítulo 7 se describe el concepto de almacenamiento de energía termo-solar (MOST) y cómo se han explorado para ello tres tipos de sistemas distintos. Este trabajo se centra principalmente en la reacción de reversión catalizada y en medidas de liberación de calor, obteniéndose un sistema récord y explorando los mecanismos que rigen estas reacciones por medio de cálculos teóricos.Universidad de La Rioja (España)Campos García, Pedro José (null)Sampedro Ruiz, Diego (null)2019text (thesis)application/pdfhttps://dialnet.unirioja.es/servlet/oaites?codigo=246393engLICENCIA DE USO: Los documentos a texto completo incluidos en Dialnet son de acceso libre y propiedad de sus autores y/o editores. Por tanto, cualquier acto de reproducción, distribución, comunicación pública y/o transformación total o parcial requiere el consentimiento expreso y escrito de aquéllos. Cualquier enlace al texto completo de estos documentos deberá hacerse a través de la URL oficial de éstos en Dialnet. 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