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Long-lifetime based pH micro-optodes without oxygen interference

DOI to cite this document:
Kosch, Ute ; Klimant, Ingo ; Wolfbeis, Otto S.
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Date of publication of this fulltext: 06 Jun 2011 13:39


The first decay time-based fiber optic pH microsensors are presented which are without cross-sensitivity to molecular oxygen. They are based on radiationless energy transfer from the donor ruthenium(II)-tris(1,10-phenanthroline) to a pH-sensitive sulfonephthalein acceptor dye. The microsensors have decay times in the microsecond range, a fact that makes them compatible with existing devices ...


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