Abstract
A novel on-off-on fluorescence chemosensor BP based on benzothiazole for the relay recognition of Fe3+ and PPi was designed and synthesized. The chemosensor BP exhibited a high affinity to Fe3+ in the presence of other competing cations. The resultant BP-Fe3+ showed excellent recognition ability for PPi via Fe3+ displacement approach. The detection limits of BP for Fe3+ and BP-Fe3+ for PPi were estimated to be 2.59 × 10−8 M and 8.47 × 10−8 M, respectively. The low cytotoxicity and good cell-membrane permeability of BP and BP-Fe3+ complex makes them capable of Fe3+ and PPi imaging in living Hep G2 cells.
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