Abstract
We describe examples for an optical gas sensor (oxygen) and an optical ion sensor (pH), and discuss how the existing need for complete mass transfer in solid-state optical sensors determines the choice of the appropriate polymer. Examples are given for biomedical instrumentation based on mass-fabricated optical sensors for oxygen, carbon dioxide and pH. We also show that specific recognition of ions, particularly of the clinically important alkali ions, is much more difficult in solid-state sensors. We discuss existing schemes for ions and demonstrate that none of them satisfies the need for rapid, pH-independent determination of ions in whole blood at room temperature and without addition of any reagent. The photo-induced electron transfer (PET) effect represents an attractive alternative to the use of fluoro-ionophores, but it is shown that PET — while being extremely useful when studied in solution — not necessarily does not occur in solid-state sensor matrices to the extent it does in fluid solution, a fact that is explained mainly in terms of rotational restriction.
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© 1997 Springer Science+Business Media Dordrecht
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Wolfbeis, O.S., Huber, C., Werner, T. (1997). Solid State Supramolecular Optical Sensors. In: Desvergne, J.P., Czarnik, A.W. (eds) Chemosensors of Ion and Molecule Recognition. NATO ASI Series, vol 492. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-3973-1_5
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DOI: https://doi.org/10.1007/978-94-011-3973-1_5
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