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Issue 21, 2013
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Extruded polymer films pigmented with a heterogeneous ion-pair based lumophore for O2 sensing

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Abstract

A novel approach to polymeric Ru(II)–diimine luminescent O2 sensors is described. The Ru(II)–diimine, tris(4,7-diphenyl-1,10-phenanthroline)ruthenium(II) dichloride ([Ru(dpp)3]2+), is first ion-paired to the surface of heterogeneous TiO2 particles, rendered negatively charged due to the alkali nature of the aqueous solution, to produce an O2 sensitive pigment with a strikingly high oxygen sensitivity (i.e. PO2 (S = 1/2) = 0.002 atm, where PO2 (S = 1/2) is defined as the amount of oxygen required to reduce the initial, oxygen free luminescence by 50%), and a rapid response to oxygen. The pigment is extruded in low density polyethylene (LDPE) to produce a thin (60 μm), flexible, O2 sensing plastic film, with an O2 sensitivity (PO2 (S = 1/2) = 0.84 atm) comparable to the more traditional homogeneous lumophore ion-pair based O2 sensor ink films reported in the literature.

Graphical abstract: Extruded polymer films pigmented with a heterogeneous ion-pair based lumophore for O2 sensing

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Publication details

The article was received on 07 Jun 2013, accepted on 05 Sep 2013 and first published on 05 Sep 2013


Article type: Paper
DOI: 10.1039/C3AN01141K
Analyst, 2013,138, 6488-6493
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    Extruded polymer films pigmented with a heterogeneous ion-pair based lumophore for O2 sensing

    A. Mills and A. Graham, Analyst, 2013, 138, 6488
    DOI: 10.1039/C3AN01141K

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