Please use this identifier to cite or link to this item: https://doi.org/10.1002/mabi.201300194
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
Authors: Shi, H.
Liu, S.
An, Z.
Yang, H.
Geng, J.
Zhao, Q.
Liu, B. 
Huang, W.
Keywords: Conjugated polyelectrolytes
Iridium complexes
Mercury probes
Phosphorescence
Issue Date: Oct-2013
Citation: Shi, H., Liu, S., An, Z., Yang, H., Geng, J., Zhao, Q., Liu, B., Huang, W. (2013-10). 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. Macromolecular Bioscience 13 (10) : 1339-1346. ScholarBank@NUS Repository. https://doi.org/10.1002/mabi.201300194
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 Hg2+ sensing in aqueous solution with good selectivity, sensitivity, as well as visible detection. Time-resolved photoluminescence is applied for Hg2+ detection, which can effectively eliminate the background interference and improve the sensing sensitivity and signal-to-noise ratio in complicated media. An anionic conjugated polyelectrolye and a cationic phosphorescent Ir(III) complex form a hybrid probe for ratiometric Hg2+ sensing with good selectivity and low detection limit. Time-resolved photoluminescence is further applied to eliminate the interference from background fluorescence, which opens new opportunities for Hg2+ sensing in complex media. © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Source Title: Macromolecular Bioscience
URI: http://scholarbank.nus.edu.sg/handle/10635/88473
ISSN: 16165187
DOI: 10.1002/mabi.201300194
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