title: A ratiometric probe composed of an anionic conjugated polyelectrolyte and a cationic phosphorescent iridium(III) complex for time-resolved detection of Hg(II) in aqueous media.
abstract: A hybrid complex composed of an anionic conjugated polyelectrolyte (PFB-SO3Na) and a cationic phosphorescent Ir(III) oligomer is formed through electrostatic interaction by simple physical mixing in aqueous media. Due to their opposite charges and their effective spectral overlap, fluorescence resonance energy transfer occurs from the blue-emissive PFB-SO3Na to the red-emissive phosphorescent Ir(III) complex, which allows ratiometric and colorimetric Hg(2+) sensing in aqueous solution with good selectivity, sensitivity, as well as visible detection. Time-resolved photoluminescence is applied for Hg(2+) detection, which can effectively eliminate the background interference and improve the sensing sensitivity and signal-to-noise ratio in complicated media.
authors.affiliation: Key Laboratory for Organic Electronics and Information Displays, Jiangsu-Singapore Joint Research Center for Organic/Bio Electronics and Information Displays; Institute of Advanced Materials, Nanjing University of Posts and Telecommunications, Wenyuan Road 9, Nanjing, 210046, China; Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive, Singapore, 117576.
authors.forename: Huifang
authors.initials: H
authors.lastname: Shi
authors.forename: Shujuan
authors.initials: S
authors.lastname: Liu
authors.forename: Zhongfu
authors.initials: Z
authors.lastname: An
authors.forename: Huiran
authors.initials: H
authors.lastname: Yang
authors.forename: Junlong
authors.initials: J
authors.lastname: Geng
authors.forename: Qiang
authors.initials: Q
authors.lastname: Zhao
authors.forename: Bin
authors.initials: B
authors.lastname: Liu
authors.forename: Wei
authors.initials: W
authors.lastname: Huang
mesh_terms: D000838:Anions / Q000737:chemistry; D002412:Cations / Q000737:chemistry; D003124:Colorimetry; D004573:Electrolytes / Q000737:chemistry; D031541:Fluorescence Resonance Energy Transfer; D007495:Iridium / Q000737:chemistry*; D049449:Luminescence; D008628:Mercury / Q000737:chemistry / Q000302:isolation & purification*; D059629:Signal-To-Noise Ratio; D014867:Water / Q000737:chemistry*
chemical_list: D000838:Anions; D002412:Cations; D004573:Electrolytes; D014867:Water; D007495:Iridium; D008628:Mercury
keywords: conjugated polyelectrolytes; iridium complexes; mercury probes; phosphorescence