title: A highly selective and sensitive fluorescent sensor for the rapid detection of Hg²⁺ based on phenylamine-oligothiophene derivative.
abstract: A fast-responsive fluorescent phenylamine-oligothiophene sensor 3TDDA was reported. This sensor exhibited highly selective and sensitive detection of Hg(2+) ion in aqueous solution (THF/CH3CN/H2O, 45/50/5, v/v) through fluorescence quenching. The detection was not affected by the coexistence of other competitive metal ions such as Na(+), K(+), Ag(+), Ca(2+), Fe(3+), Al(3+), Co(2+), Ni(2+), Zn(2+), Pb(2+), Cd(2+), Fe(2+) and Cr(3+). A stoichiometric ratio (1:1) of the sensor and Hg(2+) was determined by a Job's plot and mole-ratio curves. The binding of sensor 3TDDA and Hg(2+) was also chemically reversible with EDTA. The detection limit was calculated as low as 4.392×10(-7) M.
authors: Shandong Provincial Key Laboratory of Fine Chemicals, Qilu University of Technology, Jinan 250353, People's Republic of China. Electronic address: qf_niu1216@qlu.edu.cn.
authors: Qingfen
authors: Q
authors: Niu
authors: Shandong Provincial Key Laboratory of Fine Chemicals, Qilu University of Technology, Jinan 250353, People's Republic of China.
authors: Xingxing
authors: X
authors: Wu
authors: Shandong Provincial Key Laboratory of Fine Chemicals, Qilu University of Technology, Jinan 250353, People's Republic of China.
authors: Shanshan
authors: S
authors: Zhang
authors: Shandong Provincial Key Laboratory of Fine Chemicals, Qilu University of Technology, Jinan 250353, People's Republic of China.
authors: Tianduo
authors: T
authors: Li
authors: Shandong Provincial Key Laboratory of Fine Chemicals, Qilu University of Technology, Jinan 250353, People's Republic of China.
authors: Yuezhi
authors: Y
authors: Cui
authors: School of Chemistry and Chemical Engineering, Shandong University, Shanda Nanlu 27, Jinan 250100, People's Republic of China.
authors: Xiaoyan
authors: X
authors: Li
mesh_terms: D000814:Aniline Compounds / Q000737:chemistry*; D005456:Fluorescent Dyes / Q000737:chemistry*; D007477:Ions; D008628:Mercury / Q000032:analysis*; D013050:Spectrometry, Fluorescence; D013056:Spectrophotometry, Ultraviolet; D013876:Thiophenes / Q000737:chemistry*; D013997:Time Factors
chemical_list: D000814:Aniline Compounds; D005456:Fluorescent Dyes; D007477:Ions; D013876:Thiophenes; D008628:Mercury; C023650:aniline
keywords: Fluorescence sensor; Mercury ion; Oligothiophene; Quenching