Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 194, Issue -, Pages 120-126Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2013.12.049
Keywords
Trivalent ion sensor; Fluorescence turn-on; Proton-induced fluorescence change; Cell imaging
Funding
- CSIR [01/2727/13/EMR-II]
- Science & Engineering Research Board [SR/S1/OC-62/2011]
- DBT, New Delhi, India [BT/01/NE/PS/08]
- IIT Guwahati
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A new imidazole functionalized anthracene based Schiff base (L) was synthesized and it's selective colorimetric as well as fluorescence responses to trivalent metal cations (Al3+, Fe3+ and Cr3+) over a variety of divalent and monovalent metal cations in 1:1 methanol-water mixed solvent and in live HeLa cells were demonstrated. These selective colorimetric and fluorescence responses were explained as a consequence of protonation of L, where the lower K-sp values of M3+ (Al3+, Fe3+ and Cr3+) facilitated the generation of H+ through hydrolysis. This fluorogenic behavior of the ligand L was further confirmed by theoretical calculations. (C) 2013 Elsevier B. V. All rights reserved.
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