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Hexanedioldiacrylate (HDDA) cross-linked dodecyl acrylate (DDA) microspheres ranging from approximately 1 to 10μm in diameter have been prepared via photoinitiated dispersion polymerization and used as polymer matrices in the development of a new class of ''plasticizer-free'' ion-selective optical sensors (optodes). Incorporation of a fluorescent Nile Blue derivative (ETH 5294) into the microspheres...
The selectivities of analogous carrier-based potentiometric and optical sensors are directly compared. This is done on the basis of recent developments in both fields that allow for a thermodynamically founded description of selectivity. Extended equations are shown that allow for the interconversion of selectivity values obtained with different definitions. The response of optodes toward different...
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