Toward a highly sensitive and selective indole-rhodamine-based light-up probe for Hg 2+ and its application in living cells
摘要:
We herein designed and synthesized a light-up fluorescent probe L1 for Hg2+ species, which is based on indole derivative and Rhodamine fluorophore. The new probe can show a linear response to Hg2+ with high sensitivity and selectivity. As the Hg2+ concentration changed from 0 to 450 mu M, the fluorescence intensity of L1 at 575 nm changed from 50 to 6181 (similar to 120-fold). The detection limit of the probe was 5.0 x 10(-8) M. Besides, we have successfully applied L1 to monitor Hg2+ species in living MCF-7 cells by way of fluorescence imaging. (C) 2017 Elsevier Ltd. All rights reserved.
Toward a highly sensitive and selective indole-rhodamine-based light-up probe for Hg 2+ and its application in living cells
摘要:
We herein designed and synthesized a light-up fluorescent probe L1 for Hg2+ species, which is based on indole derivative and Rhodamine fluorophore. The new probe can show a linear response to Hg2+ with high sensitivity and selectivity. As the Hg2+ concentration changed from 0 to 450 mu M, the fluorescence intensity of L1 at 575 nm changed from 50 to 6181 (similar to 120-fold). The detection limit of the probe was 5.0 x 10(-8) M. Besides, we have successfully applied L1 to monitor Hg2+ species in living MCF-7 cells by way of fluorescence imaging. (C) 2017 Elsevier Ltd. All rights reserved.
NIR- and FRET-Based Sensing of Cu<sup>2+</sup> and S<sup>2-</sup> in Physiological Conditions and in Live Cells
作者:Chirantan Kar、Manab Deb Adhikari、Aiyagari Ramesh、Gopal Das
DOI:10.1021/ic301872q
日期:2013.1.18
We have synthesized a new indole functionalized rhodamine derivative L-1 which specifically binds to Cu2+ in the presence of large excess of other competing ions with visually observable changes in their electronic and fluorescence spectral behavior. These spectral changes are significant enough in the NIR and visible region of the spectrum and thus enable naked eye detection. The receptor, L-1, could be employed as a resonance energy transfer (RET) based sensor for detection of Cu2+ based on the process involving the donor indole and the acceptor Cu2+ bound xanthene fragment. Studies reveal that L-1-Cu complex is selectively and fully reversible in presence of sulfide anions. Further, fluorescence microscopic studies confirmed that the reagent L-1 could also be used as an imaging probe for detection of uptake of these ions in HeLa cells.