A novel colorimetric and fluorescent probe based on a core-extended perylene tetra-(alkoxycarbonyl) derivative for the selective sensing of fluoride ions. Issue 1 (22nd December 2021) - Ma, Yongshan
Abstract : A colorimetric and fluorescent probe based on a nuclear extended perylene tetra-(alkoxycarbonyl) derivative can be used for the detection of F − in liquid, solid and living cells. Abstract : A novel fluoride (F − ) colorimetric and fluorescent probe (P1 ) based on a core-extended perylene tetra-(alkoxycarbonyl) (PTAC) derivative was developed. The probe exhibited high sensitivity and selectivity for distinguishing F − from other common anions through significant changes of the UV-Vis and fluorescence spectra. Job's plot analysis revealed that the stoichiometry of the P1 –F − interaction is 1 : 1. The association constant between P1 and F − was estimated to be 9.7 × 10 2 M −1 and the detection limit of F − was about 0.97 μM. An approximately 76 nm red-shift in the absorption and fluorescent quenching response was observed when F − was associated with P1 . The emission intensity ( I 574 ) decreased linearly along with the F − concentration from 3 × 10 −5 M to 2 × 10 −4 M. The mechanism of intermolecular proton transfer (IPT) was deduced based on the changes in the absorption, fluorescence, electrochemistry, and 1 H NMR titration spectra. The density functional theory (DFT) theoretical results of the P1 –F − complex are in good agreement with the experimental results. The rapid detection of F − ions in the solid state and living cells was also studied.