Journal
JOURNAL OF MOLECULAR STRUCTURE
Volume 1273, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.molstruc.2022.134341
Keywords
10-phenanthroline; Fluorescence probe; Zinc ion; Cadmium ion
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A colorimetric and ratiometric fluorescent probe, probe 1, was designed and synthesized for the sensitive and selective detection of Zn2+ and Cd2+ in methanol, test paper, and actual water samples. Probe 1 exhibited sensitive fluorescence selectivity to Zn2+ and Cd2+ in the presence of various metal ions. The detection limits for Zn2+ and Cd2+ were 0.11 μM, and the probe showed potential application prospects in environmental ion recognition.
A colorimetric and ratiometric fluorescent probe 2-([1, 1 ' -biphenyl]-4-yl)-2, 3b,11a,11b-tetrahydro-1Himidazo[4,5-f][1,10]phenanthroline (probe 1 ), was designed and synthesized for sensitive and selective detection of Zn 2 + and Cd 2 + in methanol, test paper and actual water samples. When probe 1 was excited at 350 nm in methanol solution, in the presence of alkali metal ions, alkali-earth metal ions and a variety of transition metal ions, it showed sensitive fluorescence selectivity to Zn 2 + and Cd 2 + . With the addition of Zn 2 + , the color of the solution changed from purple to green with the naked eye, and with the addition of Cd 2 + , the color of the solution changed from purple to cyan. The fluorescence intensity of probe 1 showed a good linear relationship with Zn 2 + and Cd 2 + concentrations, and the detection limits of both Zn 2 + and Cd 2 + were 0.11 mu M. The binding mode of probe 1 and Zn 2 + was discussed according to the 1 -Zn single X-ray crystal structure. In addition, the results of strip test and real water sample test showed that probe 1 has potential application prospect in environmental ion recognition. (c) 2022 Elsevier B.V. All rights reserved.
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