Use of fluorescence spectroscopy to study polymeric materials with porous structure based on imprinting by self-assembled fibrillar networks

• Tipo: Artigo em Revista Científica Internacional
• Data: 2008

Autores

Burguete, MI (Autor) Outra; Galindo Rosales, FJ (Autor) Outra; Gavara, R (Autor) Outra; Izquierdo, MA (Autor) Outra; Lima, JC (Autor) Outra; Luis, SV (Autor) Outra; Parola, AJ (Autor) Outra; Pina, F (Autor) Outra

Revista

Título: Langmuir

Vol. 24 Nº 16

Páginas: 9795-9803

ISSN: 0743-7463

Editora: American Chemical Society

Indexação

ISI Web of Knowledge - 25 Citações

Scopus - 28 Citações

Outras Informações

ID Authenticus: P-003-W8S

DOI: 10.1021/la801342f

Abstract (EN): Different polymeric materials have been prepared from the oroartopels formed by a polymerizable methacrylic mixture (methyl i-nethacrylate/ethylene glycol dimethacrylate, 1: 1, w/w) and the macrocyclic pseudopeptide 1. The use of (2,4,6-trimethylbenzoyl)diphenylphosphine oxide as it very efficient radical initiator allows polymeric materials in which the structure of the fibrils formed by self-assembly of the organogelator 1 is truly preserved to be obtained. Removal of the pseudopeptidic molecule provides materials with a porous structure reflecting that of the original self-assembled fibrils. The use of fluorescent probes Such as rhodamine B and pyrene greatly facilitate the Study of the porous structures formed and, accordingly, that of the morphology of the original fibrils. Those studies reveal the presence of a permanent porosity and the organization of the Substructures as a porous network. This confirms the existence of a nucleation and growth mechanism for the generation of the fibrils, giving rise to the formation of spherulitic structures. Those spherulites are additionally linked by connections of variable size. A series of diffusion experiments allowed establishment of a direct dependence of the inner porosity of the materials oil the amount of self-organizing template used for their preparation.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 9