High-Temperature, Oxygen-Resistant Molecular Fluorescence Thermometers

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Abstract:

Four strongly emitting fluorescent molecules have been identified as effective liquid-phase thermometers for use at temperatures as high as 175 C under oxygen-saturated conditions. In each case, the thermometry is based on shifts and/or changes in the shape of the fluorescence emission with temperature. The four molecules and the temperature ranges tested were POPOP \[1,4-di(2-(5-phenyloxazoyl)benzene], 25- 150 C; NPO \[2-(1-naphthyl)-5-phenyloxazole], 25-173 C; BTBP \[ N,N bis(2,5-di-tert-butylphenyl)-3,4,9,10-perylene dicarboximide], 25-173 C; and BPB \[benzo(ghi)perylene], 25-171 C. Six other laser dyes were tested and were found to be unsatisfactory.

Keywords: FLUORESCENCE TEMPERATURE THERMOMETER OXYGEN QUENCHING

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/0003702971942268

Publication date: September 1, 1997

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