Dependence of calibration sensitivity of a polysulfone/Ru(II)-Tris(4,7-diphenyl-1,10-phenanthroline)-based oxygen optical sensor on its structural parameters (Articolo in rivista)

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  • Dependence of calibration sensitivity of a polysulfone/Ru(II)-Tris(4,7-diphenyl-1,10-phenanthroline)-based oxygen optical sensor on its structural parameters (Articolo in rivista) (literal)
Anno
  • 2008-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1016/j.aca.2008.08.019 (literal)
Alternative label
  • Badocco, D.; Mondin, A.; Pastore, P.; Voltolina, S.; Gross, S. (2008)
    Dependence of calibration sensitivity of a polysulfone/Ru(II)-Tris(4,7-diphenyl-1,10-phenanthroline)-based oxygen optical sensor on its structural parameters
    in Analytica chimica acta (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Badocco, D.; Mondin, A.; Pastore, P.; Voltolina, S.; Gross, S. (literal)
Pagina inizio
  • 239 (literal)
Pagina fine
  • 246 (literal)
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  • 627 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 8 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 2 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • [Pastore, Paolo; Gross, Silvia] Univ Padua, Dept Chem Sci, ISTM CNR, I-35131 Padua, Italy. [Gross, Silvia] INSTM UdR Padua, I-35131 Padua, Italy. (literal)
Titolo
  • Dependence of calibration sensitivity of a polysulfone/Ru(II)-Tris(4,7-diphenyl-1,10-phenanthroline)-based oxygen optical sensor on its structural parameters (literal)
Abstract
  • The optimum performance of an optical oxygen sensor based on polysulfone (PSF)/[Ru(II)-Tris(4,7-diphenyl-1,10-phenanthroline)] octylsulfonate (Ru(dpp)OS) was checked by carefully tuning the parameters affecting the membrane preparation. In particular, membranes having thickness ranging between 0.2 and 8.0 mu m with various luminophore concentrations were prepared by dip-coating and tested. The membrane thickness was controlled by tuning the solution viscosity, and was measured both by secondary ion mass spectrometry (SIMS) and by visible spectroscopy (Vis). Luminescence-quenching-based calibration was a single value of the Stern-Volmer constant (K-SV') for membranes containing up to 20 mmol Ru(dpp) g(-1) PSF (1.35 mu m average thickness). The K-SV' value decreased for larger-concentration. The highest sensitivity was obtained with membrane thickness around 1.6 mu m, having a response time close to 1 s. Thicker membranes exhibited an emission saturation effect and were characterized by longer response time. The K-SV' behavior was interpreted on the basis of a mathematical approach accounting for the contribution of luminescence life-time (tau(0)), oxygen diffusion coefficient (D-O2) and oxygen solubility inside the membrane (S-O2) establishing the role of all of them and allowing their experimental determination. Moreover, a simple experimental way to estimate K-SV' without needing calibration was proposed. It was based either on the light emission asymmetry or on the percent variation of light emission on passing from pure nitrogen to pure oxygen. (C) 2008 Elsevier B.V. All rights reserved. (literal)
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