期刊
JOURNAL OF FLUORESCENCE
卷 29, 期 3, 页码 569-575出版社
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s10895-019-02372-6
关键词
Spiropyran; Fluorescent sensor; Colorimetric; Cu2+ and Hg2+; Al3+; Cr3+ and Ce3+
A new spiropyran derivative acts as colorimetric and fluorescent sensor for metal ions. Addition of Cu2+, Al3+, Cr3+ and Ce3+ to the sensor solution brings about marked increase in the absorption intensities while addition of other metal ions (Na+, K+, Li+, Sr2+, Hg2+, Zn2+, Co2+, Ni2+ and Ag+) fails to cause substantial change in the UV-Vis spectra. The sensor can be used for detection of Hg2+, Cu2+, Ce3+, Cr3+ and Al3+ ions by the naked eye and by fluorescence enhancement. The detection limit of Cu2+ and Hg2+ ions by the sensor is estimated to be 10 and 14 mu M, respectively. Job's plot analysis on the sensor-Cu2+ complexation reveals the formation of a 2:1 stoichiometric complex between the sensor and Cu2+ ion.
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