Abstract
A xanthone based Pb2+ selective turn-on fluorescent probe (L) was designed, synthesized, and characterized by different spectroscopic techniques. Binding of L to Pb2+ induced significant change in the absorption and/fluorescence properties. Other common cations, viz. Na+, K+, Ca2+, Mg2+, Ag+, Mn2+, Hg2+, Fe3+, Co2+, Ni2+, Cu2+, Zn2+, Cd2+ and Cr3+ did not interfere. The limit of detection of the method was 1.8 × 10−7 M. L can detect intra-cellular Pb2+ in living cells.
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