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Strategies To Design pH Optodes with Luminescence Decay Times in the Microsecond Time Regime

Kosch, Ute ; Klimant, Ingo ; Werner, Tobias ; Wolfbeis, Otto S.
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Date of publication of this fulltext: 18 Apr 2011 13:13


Abstract

We present the first optical pH sensor with luminescence decay times longer than 1 μs. It is based on radiationless energy transfer from a luminescent ruthenium(II) complex as the donor to a colored pH indicator as the acceptor. The metal−ligand complex ruthenium(II) tris-4,4‘-diphenyl-2,2‘-bipyridyl was selected as the donor, and bromothymol blue and a reactive azo dye were selected as ...

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