ABSTRACT
The self-assembly phenomena where, due to the interaction with the solvent, molecules of an amphiphillic compound are associated spontaneously, is a general process that can be used for the preparation of supramolecular entities of great size with application in the preparation of materials either dispersed in liquid phase or either as not soluble solids. On the other hand the supramolecular association can also take place between different molecules and when one of them is an organic capsule it can hosts in its interior a molecule of lower size than its opening. 
The CB[n] are cyclic oligomers of glycoluril units bridged by methylene groups that define a cavity like a hollow pumpkin that allows to locate in its interior molecules of fluorescent dyes (Chapters 3 and 4). In the present thesis it has been developed a sensor array for quaternary ammonium salts (Chapter 3), ?-amino acids (Chapter 3) and ?-hydroxybutiric acid (Chapter 4) that is able to identify the organic compound, to determine its structure and to quantify its amount in a range of concentrations based on the changes in the image of these arrays when they are illuminated with visible or ultraviolet light. 
In the same way, CBs can also form complexes with acetanilides containing aminopropyl groups (Chapter 5) and one of the objectives of the present thesis will be the anchorage of units with acetanilido structure on the surface of silica with high superficial area by means of the derivatization of NH2 groups in the commercial silica. The aim is try to determine if these solids could adsorb significant amounts of CB[n] and if this specific adsorption is derived from the formation of host-guest complexes or if the highest contribution to the adsorption is due to nonspecific interactions such as dipole forces or hydrogen bridges. 
In this thesis we will take profit from the self-assembly of symmetrical imidazolium ionic liquids  substituted with two groups ?-alkenyl to form liposomes that will be later submitted to radical polymerization in order to maintain this morphology (Chapter 6). These liposomes will be able to contain or not gold nanoparticles and in the first case we will determine the catalytic properties of these nanoparticles for aerobic alcohol oxidation.
Another subject of interest will be to establish how the self-assembly, originated by the interaction between identical molecules that takes place above the critical self-assembly concentration influences the supramolecular association between imidazolium ionic liquids and cucurbiturils (Chapter 7) since as it occurs in the self-assembly process in the formation of the inclusion complex the operating forces also have an hydrophobic nature. 
Finally the assembly between inorganic ions and natural biopolymers will be used to pre-organize inorganic precursors so that when the biopolymer is polymerized acts like a templating agent controlling the size of the inorganic particles formed (Chapter 8).
The main goal of the present thesis is to study aggregation processes that occur in a spontaneous way in water solutions and that give rise to the formation of supramolecular host-guest complexes or to the formation of supramolecular entities as liposomes. These studies are used to develop colorimetric or fluorometric sensors, to prepare selective adsorbent solids, for liposome formation with potential catalytic activity or for the preparation of inorganic materials containing metallic nanoparticles that have improved properties than similar materials prepared without the use of templating agents.







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