Synthesis and characterization of new composites based in nanowires of conducting polymers included in nanostructured hosts

MARCOS B. GÓMEZ COSTA; M. LAURA MARTÍNEZ; JUÁREZ, JULIANA M,; ANUNZIATA, OSCAR A

Conducting Polymers: Synthesis, Properties and Applications.

Nova Science Book

Lugar: New York; Año: 2013; p. 201 - 252

During the last few years, they have obtained great advances in the knowledge of the necessary structural and electronic requirements, so that a polymer is considered conductor (Solitons, polarons and bipolarons) in conjugated polymers. However, the challenge at the moment is in securing organic structures susceptible to provide suitable conductivity. From the structural point of view, the conductive polymers are polymeric with double bonds conjugated in their main chain, being polyheterocycles one of the groups most characteristic of this type of materials. Recently, there are many references appeared on conductive polymers with polyaniline, polyacetylene, polythiophene and polypyrrole mainly, being the method of more habitual obtaining electro polymerization of corresponding monomer. Nevertheless, the synthesis electrochemistry is slow and it is of great interest to secure synthesis effective chemicals. In this sense, polymerization with oxidizing agents is being considered like the most promising route in the obtaining of conductive structures. Here we show the synthesis and characterization of new composites using nanowires of conducting polymers included in nanostructured hosts, based on polyaniline, polypyrrole, and polyindole obtained by in-situ oxidative polymerization of corresponding pre-adsorbed monomers onto de hosts, producing hybrid composites with interesting conducting properties. In this chapter, we report the incorporation of aluminium into mesoporous materials: MCM-41, SBA-3, SBA-15 and SBA-16 via the post-synthesis method, which was employed as hosts. We also discuss our results of the development of guest/host composites. The guest synthesized inside mesoporous structures, with electrical conducting or semiconducting properties, using insitu polymerization techniques to gain understanding of the monomers adsorption mode onto the host and its influence on the final composite material. The conductive properties of the composite could be modified by varying the substituent of the aromatic ring, the host structure, the anchored sites to adsorb the monomer, and the amount of the polymers nanowires in the hosts. SBA-16 via the post-synthesis method, which was employed as hosts. We also discuss our results of the development of guest/host composites. The guest synthesized inside mesoporous structures, with electrical conducting or semiconducting properties, using insitu polymerization techniques to gain understanding of the monomers adsorption mode onto the host and its influence on the final composite material. The conductive properties of the composite could be modified by varying the substituent of the aromatic ring, the host structure, the anchored sites to adsorb the monomer, and the amount of the polymers nanowires in the hosts.