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Issue 36, 2012
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A highly sensitive, single selective, real-time and “turn-on” fluorescent sensor for Al3+ detection in aqueous media

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Abstract

A “turn-on” fluorescent sensor, sodium 4,4′,4′′-(1H-pyrrole-1,2,5-triyl)tri-benzoate (Py(PhCOO-Na)3), has been prepared for the detection of Al3+ in aqueous solution. The detection mechanism, as well the mechanism specific to Al3+, was studied by fluorescence spectroscopy, UV-vis spectroscopy and dynamic light scattering (DLS) measurement. Py(PhCOONa)3 exhibited an aggregation-induced emission (AIE) characteristic and was found to show a specific affinity to Al3+, as indicated by the enhanced and bathochromically shifted emission of the AIE fluorogen. Upon binding Al3+, a significant fluorescence enhancement with a turn-on ratio of over 10-fold was triggered by the AIE process. Moreover, this sensor is highly selective for Al3+ over other metal ions with a detection limit of 5 μM and a quantitative detection range of 5–120 μM, and is able to be used in the determination of Al3+ in drinking water. The time-response investigation indicates that the emission intensity of (Py(PhCOO)3) can be quickly boosted to reach the maximum intensity in less than 10 s upon titration of Al3+.

Graphical abstract: A highly sensitive, single selective, real-time and “turn-on” fluorescent sensor for Al3+ detection in aqueous media

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Supplementary files

Article information


Submitted
27 May 2012
Accepted
27 Jul 2012
First published
14 Aug 2012

J. Mater. Chem., 2012,22, 19296-19302
Article type
Paper

A highly sensitive, single selective, real-time and “turn-on” fluorescent sensor for Al3+ detection in aqueous media

X. Shi, H. Wang, T. Han, X. Feng, B. Tong, J. Shi, J. Zhi and Y. Dong, J. Mater. Chem., 2012, 22, 19296
DOI: 10.1039/C2JM33393G

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