title: A relay strategy for the mercury (II) chemodosimeter with ultra-sensitivity as test strips.
abstract: A relay strategy has been proposed to design a new Hg(2+) chemodosimeter (TPE-S), by coupling Hg(2+)-promoted deprotection reaction with ketone-enol isomerization, realizing the multistage amplifying effect. Changes in both of color and fluorescence could occur immediately, and TPE-S displayed high selectivity for Hg(2+), other metal ions (Ag(+), Fe(3+), Cu(2+), Pb(2+), Co(2+), Cr(3+), Al(3+), Cd(2+), Mg(2+), Mn(2+), Ba(2+), Fe(2+), Ca(2+), Ni(2+), Zn(2+), Li(+), K(+) and Na(+)) gave nearly no disturbance to the sensing process. When fabricated as test strips similar to pH-indicator papers, immediate color change from colorless to purple could be visually observed by naked-eyes without the aid of any additional equipment, with the detection limit as low as 1 × 10(-7) M (Hg(2+) in aqueous solution). Due to its easy synthesis, high selectivity and sensitivity, combined with the portable test strips, TPE-S could be developed as a convenient and cost-effective tool for the detection of Hg(2+) in on-site inspections.
authors.affiliation: Department of Chemistry, Hubei Key Lab on Organic and Polymeric Opto-Electronic Materials, Wuhan University, Wuhan 430072, China.
authors.forename: Zhijun
authors.initials: Z
authors.lastname: Ruan
authors.affiliation: China State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, The Chinese Academy of Sciences, Wuhan, 430071, China.
authors.forename: Conggang
authors.initials: C
authors.lastname: Li
authors.affiliation: Department of Chemistry and Chemical Engineering, Beijing University of Technology, Beijing, 100124, China.
authors.forename: Jian-Rong
authors.initials: JR
authors.lastname: Li
authors.affiliation: Department of Chemistry, Hubei Key Lab on Organic and Polymeric Opto-Electronic Materials, Wuhan University, Wuhan 430072, China.
authors.forename: Jingui
authors.initials: J
authors.lastname: Qin
authors.affiliation: Department of Chemistry, Hubei Key Lab on Organic and Polymeric Opto-Electronic Materials, Wuhan University, Wuhan 430072, China.
authors.forename: Zhen
authors.initials: Z
authors.lastname: Li
mesh_terms: D005453:Fluorescence; D005456:Fluorescent Dyes / Q000737:chemistry; D057230:Limit of Detection; D008628:Mercury / Q000737:chemistry*; D008670:Metals / Q000737:chemistry; D011934:Reagent Strips / Q000737:chemistry*
chemical_list: D005456:Fluorescent Dyes; D008670:Metals; D011934:Reagent Strips; D008628:Mercury