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A ditopic colorimetric sensor for fluoride ion based on thiourea mercury complex



A ditopic colorimetric sensor for fluoride ion based on thiourea mercury complex



Spectrochimica Acta. Part A Molecular and Biomolecular Spectroscopy 71(3): 814-817



A novel ditopic chromogenic receptor, N-5-(8-hydroxy)quinoline-N'-4'-nitro-phenyl thiourea (1), was synthesized. The metal complex 1-Hg(2+) showed sensitive and highly selective responses to F(-) over other anions such as CH(3)CO(2)(-), H(2)PO(4)(-), HSO(4)(-) and Cl(-). 1-Hg(2+)-F(-) complex formed, which promoted the intramolecular charge transfer and led to a dramatic spectral change. The color of 1-Hg(2+) solution changed from colorless to red upon addition of F(-). Thus, a colorimetric assay of F(-) was developed in acetonitrile by naked-eye detection. F(-) behaved linearly in the 8.0 x 10(-6) to 2.0 x 10(-5) mol L(-1) concentration range with LOD as 1.4 x 10(-6) mol L(-1).

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Accession: 051128634

Download citation: RISBibTeXText

PMID: 18375177

DOI: 10.1016/j.saa.2008.02.024


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