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- W2193236716 abstract "Two novel colorimetric and fluorescent off-on enantiomers (R/S-RBOL) were developed to detect Fe3' in aqueous and biological samples through probing the integrated changes in fluorescence, circular dichroism (CD) and circularly polarized luminescence (CPL). The fluorescence intensity of R/S-RBOL is linearly proportional to the Fe3+ concentration in the range of 0-20 equiv., bringing out a detection limit of 1.83 x 10(-7)M. The Job's plot indicates a 1:1 binding stoichiometry of RBOL:Fe3+, which is further confirmed by ESI-MS analysis. Moreover, the RBOLs exhibit a dual-readout response in colour and fluorescence, rendering them suitable to sense Fe3+ in living cells with low cytotoxicity. In order to shed some light on the detection mechanism, the coordination between R/S-RBOL and Fe3+ is unravelled by DFT calculations. From the free RBOL to the RBOL-Fe3+ complex, the spiro-lactam ring is opened to interact with Fe3+ via the lactam N and O, imine N and hydroxyl 0 atoms in the form of a ferric six-coordinate structure. (C) 2015 Elsevier B.V. All rights reserved." @default.
- W2193236716 created "2016-06-24" @default.
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- W2193236716 date "2016-03-01" @default.
- W2193236716 modified "2023-10-12" @default.
- W2193236716 title "Novel colorimetric and fluorescent off–on enantiomers with high selectivity for Fe3+ imaging in living cells" @default.
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- W2193236716 doi "https://doi.org/10.1016/j.snb.2015.10.104" @default.
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