A New Rhodamine‐based Fluorescent Probe for the Discrimination of Fe3+ from Fe2+

摘要

A new rhodaminea??based fluorescent probe for the discrimination of Fe3+ from Fe2+ has been designed and investigated. The probe shows an immediate visual color change in response to Fe3+ and Cu2+, while only Fe3+ triggers the fluorescent change of the probe. The existence of large amount of other metal ions shows negligible interference in the detection of Fe3+. The association constant K ass of 4.64a????a??108a??Ma??2 (R2 = 0.994) and 5.38a????a??108a??Ma??2 (R2 = 0.991) of the complex was derived from UV/Vis and fluorescence titration assuming 12 stoichiometry of probea??Fe3+ complex, respectively.