Publication: Materiales moleculares líquido cristalinos: comportamiento de fase y luminiscente de compuestos de coordinación basados en ligandos β-dicetona funcionalizados. Cristales líquidos iónicos. Conductividad
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2018-09-05
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Universidad Complutense de Madrid
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Abstract
Hay actualmente un gran interés en la consecución de materiales moleculares, con funcionalidades añadidas para su aplicación en tecnologías emergentes. En particular, los materiales líquido-cristalinos son de gran importancia debido a que están presentes en multitud de campos de la vida cotidiana, tecnológicos como pantallas de televisión, ordenadores, calculadoras y relojes, o en otros tan dispares como detergentes, cosméticos o termómetros de temperatura. En este contexto de aplicabilidad, los cristales líquidos luminiscentes, que combinan propiedades mesomórficas y fotofísicas, resultan muy atractivos, ya que pueden utilizarse para aplicaciones optoelectrónicas, por ejemplo, como fuente de luz en dispositivos cristal líquido (LCDs) y en sistemas de imágenes tridimensionales, entre otras. Por otra parte, los cristales líquidos iónicos son también interesantes debido a su sencilla estructura, compuestos de cationes y aniones, y a la combinación de las propiedades mesogénicas, de los cristales líquidos, e iónicas, de los líquidos iónicos, lo que les confiere características útiles para distintas aplicaciones en electrónica molecular, baterías, células solares o como disolventes en reacciones químicas, materiales electrocrómicos, etc. El diseño de nuevas especies con propiedades optimizadas cristal líquido y que presenten otras adicionales como luminiscencia, conductividad, etc., constituye uno de los retos actuales de investigación. Bajo estas premisas, el objetivo principal desarrollado en este trabajo de investigación se ha dirigido a la obtención de nuevos materiales moleculares con propiedades cristal líquido que combinaran funcionalidades adicionales, como son los metalomesógenos luminiscentes o los cristales líquidos iónicos, basados en compuestos de coordinación o especies híbridas orgánicas/inorgánicas, respectivamente. En el primer caso, se trata de determinar la influencia de diferentes factores que contribuyan a un diseño molecular adecuado para obtener ambas funcionalidades, mientras que en el segundo tipo de compuestos se analiza la influencia que tienen las partes constituyentes de la sal en las propiedades mesomórficas y en la conductividad...
There is currently a great interest for the consecution of molecular materials with additional functionalities for their application in emerging technologies. In particular, materials exhibiting liquid crystal properties are of great importance, because they occur in many fields of daily life, both technological such as television screens, computers, calculators and watches, or others as in detergents, cosmetics or thermometers. In this context of applicability, luminescent liquid crystals, which combine mesomorphic and photophysical properties, are very attractive for optoelectronic applications, where they are used as a light source in liquid crystal devices (LCDs) and in three-dimensional image systems, among others. On the other hand, ionic liquid crystals are also interesting due to their simple structure constituted by cations and anions, and the combination of the characteristic mesomorphic and ionic properties of the liquid crystals and ionic liquids, respectively, which give them interesting features for applications in molecular electronics, batteries, solar cells or solvents in chemical reactions. By considering these aspects, the main objectives of this research work are focused on the consecution of new molecular materials with liquid crystal properties that also combine other additional functionalities. So, luminescent metalomesogens and ionic liquid crystals, which are based on coordination compounds or organic/inorganic hybrid species, respectively, are the materials studied in this work. The influence of different factors that contribute to a suitable molecular design to obtain mesomorphic and luminescent properties is analyzed in the first case, whereas in the second one it is considered the influence of the constituent parts of the salt in the mesomorphic properties and in the conductivity. The design of novel species with optimized liquid crystal behaviour, which have additional properties as luminescence or conductivity, constitutes one of the current research challenges...
There is currently a great interest for the consecution of molecular materials with additional functionalities for their application in emerging technologies. In particular, materials exhibiting liquid crystal properties are of great importance, because they occur in many fields of daily life, both technological such as television screens, computers, calculators and watches, or others as in detergents, cosmetics or thermometers. In this context of applicability, luminescent liquid crystals, which combine mesomorphic and photophysical properties, are very attractive for optoelectronic applications, where they are used as a light source in liquid crystal devices (LCDs) and in three-dimensional image systems, among others. On the other hand, ionic liquid crystals are also interesting due to their simple structure constituted by cations and anions, and the combination of the characteristic mesomorphic and ionic properties of the liquid crystals and ionic liquids, respectively, which give them interesting features for applications in molecular electronics, batteries, solar cells or solvents in chemical reactions. By considering these aspects, the main objectives of this research work are focused on the consecution of new molecular materials with liquid crystal properties that also combine other additional functionalities. So, luminescent metalomesogens and ionic liquid crystals, which are based on coordination compounds or organic/inorganic hybrid species, respectively, are the materials studied in this work. The influence of different factors that contribute to a suitable molecular design to obtain mesomorphic and luminescent properties is analyzed in the first case, whereas in the second one it is considered the influence of the constituent parts of the salt in the mesomorphic properties and in the conductivity. The design of novel species with optimized liquid crystal behaviour, which have additional properties as luminescence or conductivity, constitutes one of the current research challenges...
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Tesis de la Universidad Complutense de Madrid, Facultad de Ciencias Químicas, Departamento de Química Inorgánica I, leída el 14/07/2017