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

• Type: Article in International Scientific Journal
• Date: 2008

Authors

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

Journal

Title: Langmuir

Vol. 24 No. 16

Pages: 9795-9803

ISSN: 0743-7463

Publisher: American Chemical Society

Indexing

ISI Web of Knowledge - 25 Citations

Scopus - 28 Citations

Other information

Authenticus ID: 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 9