Preparation of Vanillin-substituted Perylenediimide Fluorescent Probes and Identification of Pb2+
A novel perylenediimide Pb2+fluorescent probe N,N-diheraldehyde-1,6,7,12-tetrachloro-3,4:9,10-perylenediimide(PDI-VBD)was designed and synthesizedthrough using perylenediimides as fluorescent groups,using perylene tetracarboxylic anhydride and vanillin as raw materials.The structure of probe PDI-VBD was characterized by MS and NMR.The fluorescence recognition performance of probe PDI-VBD for Pb2+was investigated by UV absorption and fluorescence spectroscopy.The results of spectral analysis show that the probe PDI-VBD shows strong selective recognition ability and high sensitivity to Pb2+in NMP/H2O solution.The perylenediimide derivatives PDI-VBD has weak fluorescence,but after combining with Pb2+,it produces a coordination compound with strong fluorescence.Metal ion coexistence experiments show that the fluorescence probe has high selectivity for Pb2+and is not interfered by other metal ions.The results showed that the vanillin-substituted perylenediimide derivative PDI-VBD is a novel Pb2+fluorescent probe with good selectivity and high sensitivity,which can be used for the detection of heavy metal Pb2+in real water samples,food and environment.
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