Abstract
The color space response of colorimetric luminescent oxygen sensors is described in terms of the Commission Internationale de l'Eclairage (CIE) x,y color coordinates. We show how the color change response to oxygen can be obtained, provided the quenching kinetics for all lumophores involved can be represented mathematically. The theory is illustrated by analysis of examples of theoretical sensors in which lumophores are quenched by Stern-Volmer kinetics to give red to green, green to red, and red to green to blue color responses as the partial pressure of oxygen is increased. The effects of lumophore emission lifetime and the permeability of the polymer matrix to oxygen are discussed in terms of the control of sensor response, which variations in these parameters offer.
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