Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 221, Issue -, Pages 730-739Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2015.06.133
Keywords
Fluorescence; Chemosensor; Aggregation-induced emission enhancement (AIEE); Coordination-induced aggregation; Mercury
Funding
- Educational Commission of Anhui Province of China [KJ2014ZD02]
- National Natural Science Foundation of China [51432001, 51272002]
- Start-up research grant of University of Macau [SRG2015-00007-FHS]
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By combination of the AIEE-active fluorophore and coordination binding group, a new selective and sensitive probe (1) for Hg2+ detection has been synthesized. 1 exhibits weak fluorescence in dilute solution, but exhibits dramatically enhanced emission in aggregation. In the solid state, a remarkable red-shifted emission and longer PL lifetime of 1 are present, which is caused by the formation of excimers due to the pi-pi stacking interactions of the coumarin groups. This AIEE effect of 1 is utilized to design probe for the detection of Hg2+ in a luminescence turn-on mode. The functionalization of the AIEE-active molecule with chelating group provides the potential binding sites for Hg2+. The selective coordination-induced aggregation bursts the emission. 1 has been successfully applied to detect Hg2+ in aqueous and living cells. (C) 2015 Elsevier B.V. All rights reserved.
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