title: A ditopic colorimetric sensor for fluoride ion based on thiourea mercury complex.
abstract: 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).
authors: Department of Chemistry and Center of Analysis and Testing, Nanchang University, Nanchang 330031, China.
authors: Mei-Zhen
authors: MZ
authors: Sun
authors: Fang-Ying
authors: FY
authors: Wu
authors: Yu-Mei
authors: YM
authors: Wu
authors: Wen-Ming
authors: WM
authors: Liu
mesh_terms: D002863:Chromogenic Compounds / Q000138:chemical synthesis / Q000737:chemistry; D003124:Colorimetry / Q000379:methods*; D005459:Fluorides / Q000032:analysis*; D017669:Mercury Compounds / Q000138:chemical synthesis / Q000737:chemistry; D015394:Molecular Structure; D013053:Spectrophotometry; D013056:Spectrophotometry, Ultraviolet; D013890:Thiourea / Q000031:analogs & derivatives / Q000138:chemical synthesis / Q000737:chemistry
chemical_list: D002863:Chromogenic Compounds; D017669:Mercury Compounds; D013890:Thiourea; D005459:Fluorides