Luminescence Quenching Behavior of an Oxygen Sensor Based on a Ru(II) Complex Dissolved in Polystyrene

Chemically homogeneous polymer layers loaded with oxygen-quenchable luminescent dyes may lead to promising applications for optical oxygen sensing. In this work, luminescence quenching of tris(4,7'-diphenyl-1,10'-phenanthroline)Ru(II) perchlorate, dissolved in a polystyrene layer, has been investigated. Although the dye appears to be molecularly dispersed in this glassy polymer, the Stern-Volmer intensity plot is nonlinear and the luminescence decay is not single exponential. This can be attributed to a spatial disorder in the polymer structure, which is likely to determine the excited state properties

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