Synthesis, characterization and deposition on surfaces of curcuminoids-based systems
- Autores: Raúl Díaz Torres
- Directores de la Tesis: Núria Aliaga-Alcalde (dir. tes.), Eliseo Ruiz Sabin (tut. tes.)
- Lectura: En la Universitat de Barcelona ( España ) en 2018
- Idioma: español
- Materias:
- Enlaces
- Tesis en acceso abierto en: TDX
- Resumen
Nanoscience and Nanotechnology have become research areas that promote the design and fabrication of novel devices with a number of different applications with the aim of satisfying the growing demand of the society regarding technological advances. In this regard, promising molecular-based systems, to be applicable in these fields, are the so-called Curcuminoids (CCMoids).
The main goal of this thesis rest on the design and synthesis of new CCMoids that can be applied in different areas of nanoscience. Thus, different modifications on their structure were carried out in order to achieve interesting properties. The results obtained in this work have been grouped in five different sections; corresponding each one to a different area. This way: (1) Molecular Magnetism: the first section is focused on the search of systems which display interesting magnetic properties, especially systems with single molecule magnet behavior. Thus, magneto-structural studies were performed by the synthesis of several coordination compounds using magnetic metallic centers (CoII and NiII) coordinate with a CCMoid ligand called 9Accm.
(2) Molecular Electronic: the second section focuses on the study of the electronic transport of a new CCMoid system within a three terminal nanodevice containing few layer graphene (FLG) electrodes. This study centers in the improvement of the conductive properties of a previously measured CCMoid system, in which 9Accm was used as a nanowire in a molecular transistor by π-π stacking interactions with the graphene electrodes (3) Molecular Sensors: the third section is based on the immobilization of fluorescent CCMoids on surfaces and their used as chemical sensors for boron ions. The immobilization was carried out on functionalized SiO2 surfaces by the use of the Microcontact printing technique (μ-CP) that allowed the creation of fluorescent micropatterns on the surfaces. In addition, studies regarding the coordination of boron to the CCMoids attached on the surfaces and the effect in their fluorescent properties was performed to explore they as chemical sensors. (4) Molecular Host-Guest Chemistry: the fourth section is focused on the fabrication of supramolecular host-guest systems based on CCMoids. In the first part, a study of the CCMoid acting as a guest was performed. In this case, a novel CCMoid molecule that contain a ferrocene group is inserted in different host cavities (cyclodextrin and cucurbituril). This study was performed in solution and on Au surfaces. On the other hand, the synthesis of another CCMoid was carried out to be used as a host, being the main ligand in the formation of molecular cages.
(5) Molecular Donor/Acceptor Chemistry: the fifth section is based on the study of the donor/acceptor properties of additional CCMoids with the idea of using them as components of organic photovoltaics cells (OPVs). For this study, the synthesis of two families of CCMoids with acceptor and donor moieties on the sides of the molecules was performed, and additional variations on their structure were achieved to assess their influence on the optical and electronic properties of the systems.
