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Poly(methylmethacrylate) as immobilization matrix for Ru(II)-complex, a potential optical oxygene sensor

J. ZAHARIEVA1,* , M. MILANOVA1, D. TODOROVSKY1

Affiliation

  1. Faculty of Chemistry, University of Sofia, 1, J. Bourchier Blvd., Sofia 1164, Bulgaria

Abstract

Microcomposites are produced consisting of optically active Ru (II)-tris(4,7-diphenyl-1,10-phenanthroline)dichloride (Rudpp) immobilized in poly(methylmethacrylate) prepared by polymerization of the monomer or by using chlorophorm solution of the polymer. The morphology of films and membranes (up to 1.5 mm in thickness) is studied in dependence of the matrix production method and conditions of specimens’ preparation. Partial destruction of the complex is observed during the polymerization of the monomer causing decrease of the fluorescence intensity. The embedding of the fluorophore has no significant effect on its excitation and emission spectra. The response of composites to O2 in gas phase or dissolved in water follows Stern-Volmer dependence with very good linearity but with relatively low quenching constant. The two weeks soaking of the samples in distilled water leds to a moderate decrease of the fluorescence intensity..

Keywords

Optical oxygen sensors, Poly(methylmethacrylate), Ru(II) complex.

Submitted at: March 9, 2011
Accepted at: June 9, 2011

Citation

J. ZAHARIEVA, M. MILANOVA, D. TODOROVSKY, Poly(methylmethacrylate) as immobilization matrix for Ru(II)-complex, a potential optical oxygene sensor, Journal of Optoelectronics and Advanced Materials Vol. 13, Iss. 6, pp. 727-732 (2011)