Time-resolved fluorescence spectroscopy for chemical sensors
1996; Optica Publishing Group; Volume: 35; Issue: 21 Linguagem: Inglês
10.1364/ao.35.004117
ISSN0003-6935
AutoresSonja Draxler, Max E. Lippitsch,
Tópico(s)Spectroscopy and Laser Applications
ResumoA family of sensors is presented with fluorescence decay-time measurements used as the sensing technique. The concept is to take a single fluorophore with a suitably long fluorescence decay time as the basic building block for numerous different sensors. Analyte recognition can be performed by different functional groups that are necessary for selective interaction with the analyte. To achieve this, the principle of excited-state electron transfer is applied with pyrene as the fluorophore. Therefore the same instrumentation based on a small, ambient air–nitrogen laser and solid-state electronics can be used to measure different analytes, for example, oxygen, pH, carbon dioxide, potassium, ammonium, lead, cadmium, zinc, and phosphate.
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