A fluorescent optical fibre chemosensor for mercury detection

Stephen P. Wren; Tong Sun; Kenneth T. V. Grattan

doi:10.1117/12.2194588

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28 September 2015 A fluorescent optical fibre chemosensor for mercury detection

Stephen P. Wren, Tong Sun, Kenneth T. V. Grattan

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Proceedings Volume 9634, 24th International Conference on Optical Fibre Sensors; 96346C (2015) https://doi.org/10.1117/12.2194588
Event: International Conference on Optical Fibre Sensors (OFS24), 2015, Curitiba, Brazil

Abstract

A proof-of-concept mercury probe was developed based on covalent attachment of a chemical coating to optical fibre. The sensing element comprised a dansyl derivative and crown ether moiety, acting as fluorophore and metal ion chelator respectively. An ON-OFF type fluorescence (quench) occurred upon binding of mercury ions, via an intramolecular charge transfer mechanism, in aqueous solution in the 909nM-90.9μM (247 ppb -24.7 ppm) concentration range. A washing protocol was identified for sensor regeneration allowing the probe to be re-used.

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Stephen P. Wren, Tong Sun, and Kenneth T. V. Grattan "A fluorescent optical fibre chemosensor for mercury detection", Proc. SPIE 9634, 24th International Conference on Optical Fibre Sensors, 96346C (28 September 2015); https://doi.org/10.1117/12.2194588

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