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Polymer films doped with colorants as oxygen sensitive materials

R. SETNESCU1,2,* , S. JIPA1,2, T. SETNESCU1,2, A. F. DANET3, M. DONDOI3, M. DUMITRU2

Affiliation

  1. Valahia University of Târgovi te, Faculty of Sciences & Arts, Dept. Chemistry, Bd. Regele Carol I Nr. 2, Târgovi te, Romania
  2. National R & D Institute on Electrical Engineering (INCDIE ICPE-CA), Splaiul Unirii 313, Sector 3, Bucharest, Romania
  3. University of Bucharest, Faculty of Chemistry, Bd. Elisabeta 4-12, Sector 3, Bucharest, Romania

Abstract

The aim of this work was to make a polymeric material exhibiting oxygen quenching phtoluminescence (PL) and to characterize its sensitivity to oxygen pressure variation. The following main results were obtained: - polystyrene thin films exhibited intense fluorescence emission at ca. 400 nm upon irradiation with UV light (313 nm), that is oxygen sensitive. - we found, using some xanthene dyes that, by doping with adequate substances, a luminescence emission in the visible region can be obtained and this emission is oxygen sensitive. - the emission spectra of the film has been very similar, upon experimental conditions, to that from an oxygen sensor (pressure sensitive paint) used as a reference; - film samples, and reference, exhibited linear correlation of luminescence signal and O2 partial pressure; the sensitivity as it has been evaluated from the slope of the straight line [IPL = f(pO2)] is depending on the nature and concentration of the dye. The results are important to prepare new oxygen sensors for various technical appliances, because the resulting materials are very cheap and easy to be prepared..

Keywords

Oxygen sensors, Polymer films, Photoluminescence.

Submitted at: Jan. 18, 2006
Accepted at: March 23, 2006

Citation

R. SETNESCU, S. JIPA, T. SETNESCU, A. F. DANET, M. DONDOI, M. DUMITRU, Polymer films doped with colorants as oxygen sensitive materials, Journal of Optoelectronics and Advanced Materials Vol. 8, Iss. 2, pp. 682-686 (2006)