title: A disulfide-linked naphthalimide dimer for Hg(II) detection in aqueous solution.
abstract: A disulfide linked naphthalimide dimer probe was designed for mercury ion (Hg(2+)) recognition in this work. The recognition was based on the strong affinity of mercury for sulfur. The experimental results revealed that the probe exhibited high selectivity and sensitivity toward Hg(2+) in comparison to other metal ions via a turn-on and reversible response to Hg(2+) in neutral buffer solution. More importantly, the probe demonstrated a linear response for Hg(2+) over a concentration range from 0 to 150 μM with a detection limit of 0.38 μM, which is just the limit of the safe concentration for humans. Upon addition of 150 μM Hg(2+), the enhancement of fluorescence reached a maximum (∼7-fold). The performances of the probe indicated that it could meet the selectivity requirements for biomedical and environmental application and also was sensitive enough to detect Hg(2+) in environmental and biological samples.
authors.affiliation: Key Laboratory of Cluster Science of Ministry of Education, Department of chemistry, School of Science, Beijing Institute of Technology, Beijing 100081, People's Republic of China.
authors.forename: Yamin
authors.initials: Y
authors.lastname: Li
authors.forename: Xiaoling
authors.initials: X
authors.lastname: Zhang
authors.forename: Baocun
authors.initials: B
authors.lastname: Zhu
authors.forename: Juan
authors.initials: J
authors.lastname: Xue
authors.forename: Jilin
authors.initials: J
authors.lastname: Yan
mesh_terms: D019281:Dimerization; D004220:Disulfides / Q000737:chemistry*; D005456:Fluorescent Dyes / Q000138:chemical synthesis / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D008628:Mercury / Q000032:analysis*; D015394:Molecular Structure; D053644:Naphthalimides / Q000138:chemical synthesis / Q000737:chemistry*; D012996:Solutions; D013050:Spectrometry, Fluorescence; D014867:Water / Q000737:chemistry
chemical_list: D004220:Disulfides; D005456:Fluorescent Dyes; D053644:Naphthalimides; D012996:Solutions; D014867:Water; D008628:Mercury