Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 182, Issue -, Pages 530-537Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2013.03.050
Keywords
Mercury ion sensor; Copper sensor; Rhodamine; Fluorescent sensor; Calorimetric sensor
Funding
- National Research Foundation of Korea (NRF)
- Korea government (MEST) [2012R1A3A2048814]
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In this paper, we report new rhodamine hydrazone derivatives bearing multiple ether units or phenol group as selective fluorescent and calorimetric chemodosimeters for Hg2+ and a selective colorimetric chemosensor for Cu2+. Monomeric derivative 1 containing additional ether moieties and a dimeric system 2 displayed excellent fluorescence and calorimetric selectivity for Hg2+ in aqueous solution. 1 displayed much lower detection limit compared to 2 and both of these new hydrazone derivatives act as chemodosimeters for Hg2+. On the other hand, dimeric system 3 containing an additional phenol group showed a highly selective and reversible calorimetric change with Cu2+ in CH3CN-HEPES buffer. The detection limit was calculated as 0.15 mu M with the linear range of 280-800 nM. Finally, probe 1 was further applied to the cell-imaging of Hg2+ using HeLa cells. (C) 2013 Elsevier B.V. All rights reserved.
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