title: "Turn-on" chemiluminescence sensor for the highly selective and ultrasensitive detection of Hg2+ ions based on interstrand cooperative coordination and catalytic formation of gold nanoparticles.
abstract: Monitoring the levels of potentially toxic metal ions such as Hg(2+) in aquatic ecosystems is important because this ion can have severe effects on human health and the environment. Thus, a novel chemiluminescence (CL) sensor is developed for the highly selective and ultrasensitive detection of Hg(2+) ions in aqueous solution, based on thymine-Hg(2+)-thymine (T-Hg(2+)-T) coordination chemistry and subsequent formation of gold nanoparticles (Au NPs) in a HAuCl(4)/NH(2)OH reaction. The thus-formed Au NPs trigger the reaction between luminol and AgNO(3), producing CL emission. This novel CL technique has several advantages including high sensitivity (0.01 ppb) and selectivity over a spectrum of interfering metal ions. In view of these advantages, as well as the cost-effective, minimized working steps and portable features of the CL techniques, we expect that this CL sensor will be a promising candidate for the field detection of toxic Hg(2+) ions in environment, water, and food samples.
authors: School of Pharmacy, Fudan University, Shanghai, China.
authors: Sheng
authors: S
authors: Cai
authors: Kameng
authors: K
authors: Lao
authors: Choiwan
authors: C
authors: Lau
authors: Jianzhong
authors: J
authors: Lu
mesh_terms: D002384:Catalysis; D006046:Gold / Q000737:chemistry*; D007477:Ions / Q000737:chemistry; D008163:Luminescent Measurements; D008165:Luminol / Q000737:chemistry; D008628:Mercury / Q000032:analysis*; D053768:Metal Nanoparticles / Q000737:chemistry*; D012835:Silver Nitrate / Q000737:chemistry; D013941:Thymine / Q000737:chemistry
chemical_list: D007477:Ions; D008165:Luminol; D006046:Gold; D012835:Silver Nitrate; D008628:Mercury; D013941:Thymine