NIR- and FRET-Based Sensing of Cu2+ and S2- in Physiological Conditions and in Live Cells
NIR- and FRET-Based Sensing of Cu2+ and S2- in Physiological Conditions and in Live Cells
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DOI：
10.1021/ic301872q
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发表时间：
2013-01-21
影响因子：
4.6
通讯作者：
Das, Gopal
中科院分区：
文献类型：
--
作者：
Kar, Chirantan;Adhikari, Manab Deb;Das, Gopal
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.
