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A highly sensitive fluorescent sensor for Cd2+ and Zn2+ based on diarylethene with a pyrene unit
Ist Teil von
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 2020-02, Vol.227, p.117581, Article 117581
Ort / Verlag
Elsevier B.V
Erscheinungsjahr
2020
Link zum Volltext
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
A novel multifunctional diarylethene fluorescence sensor 1O containing pyrene unit was designed and synthesized. The photochromism and fluorescence photoswitching properties of this diarylethene were studied in detail by irradiation of UV/Vis lights and response of metal ions in acetonitrile solution. Diarylethene fluorescence sensor 1O has high selectivity and sensitivity for the detections of Cd2+ and Zn2+. The limit of detections (LODs) for Cd2+ and Zn2+ were determined to be 1.85 × 10−9 mol L−1 and 7.68 × 10−9 mol L−1, respectively. The binding constants (Ka) of 1O with Cd2+ and Zn2+ in acetonitrile solution were calculated to be 5.8 × 104 mol−1 L and 6.0 × 104 mol−1 L, respectively. The compound 1O responded to the metal ions (Cd2+/Zn2+) to form complexations with 1 : 1 stoichiometry which were verified by Job's plot and MS analysis, respectively. In addition, the fluorescence sensor 1O has been successfully applied to the detection of Cd2+ and Zn2+ in real water samples and processed into test strips for on-site analysis and testing.
Photochromism, color and fluorescence changes of 1O induced by Zn2+/Cd2+ and UV/Vis lights in acetonitrile. [Display omitted]
•A new diarylethene fluorescence sensor containing pyrene unit was designed and synthesized.•Diarylethene fluorescence sensor has high selectivity and sensitivity for the detection of Cd2+ and Zn2+.•1O can be successfully applied to the detection of Cd2+ and Zn2+ in real water samples and processed into test strips.