Abstract
A BINOL‐based chiral aldehyde containing hydrophilic PEG groups was synthesized. It was found that in HEPES buffer solution at neutral pH this compound in combination with Zn2+ ions shows a highly enantioselective fluorescent response toward various amino acids and can be used to determine their enantiomeric composition. The 1H NMR and mass spectroscopic analyses have shown that the BINOL‐based chiral aldehyde can react with one enantiomer of an amino acid and Zn2+ to form the corresponding imine‐zinc complex more than the other enantiomer, giving the observed highly enantioselective fluorescence enhancement.
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