Abstract
In this work, a new diarylethene chemosensor with excellent photochromic properties upon UV-vis irradiation was designed and synthesized. Moreover, the fabricated probe could detect the CN− via colorimetric assay with the color change from colorless to yellow that can be observed by the naked eye. The sensor also exhibited an outstanding fluorescent relay-response toward Al3+/Cr3+ with high selectivity and sensitivity. Upon binding with Al3+, the generated diarylethene aluminum complex, confirmed by Job's plot titrations and mass spectrometry analysis, could exhibit a remarkable fluorescence enhancement (Φ = 0.583) with a limit of detection (LOD) of 5.47 × 10−7 M. The diarylethene-based chelate can be further used as a new platform for sensitive detection of Cr3+ through fluorescence quenching caused by Al3+ replacement.
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