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摘要
A metal-free tetra(aryl) porphyrin derivative, modified by a N,N'-bis(2-hydroxyethyl)-1,6,7,12-tetrachloroperylene-3,4:9,10-bis(dicarboximide) group, namely TBPP-PDI (1), has been designed, synthesized, and characterized. TBPP-PDI is employed as a resonance-energy-transfer (RET) based sensor for the detection of Pb2+, based on a process involving the donor PDI and the acceptor porphyrin. Binding with Pb2+ induces significant change in the solution color, enabling naked-eye detection. Furthermore, the large changes in the intensity ratio of the two absorptions (I-466/I-418) and distinct emissions (F-607/F-719) allow for the ratiometric detection of Pb2+ with excellent sensitivity. The detection limit for the Pb2+ ion with TBPP-PDI is determined to be 4.0 x 10(-7) M under the present conditions. More importantly, the sensor provides the potential application of on-site and real-time detection of unknown Pb2+ ions in real systems. The present results represent the first example of a PDI-porphyrin based triplex-signal optical sensor for Pb2+, and provide the basis for a practical strategy for the rational design of new functional probes for many useful applications in real systems.
- 出版日期2018-5-15
- 单位济南大学
