Fluorescent microspheres of polystyrene-based Eu（Ⅲ） complexes were prepared from TentaGel resin, 2,6-bisbenzimidazolylpyridine and europium nitrate. The microspheres were characterized by FTIR spectroscopy, element...Fluorescent microspheres of polystyrene-based Eu（Ⅲ） complexes were prepared from TentaGel resin, 2,6-bisbenzimidazolylpyridine and europium nitrate. The microspheres were characterized by FTIR spectroscopy, elemental analysis, XPS measurements and fluorescence spectroscopy. Characteristic red emission under irradiation of 365 nm light from a hand-held UV lamp was observed for the microspheres either in a solution or solid-state. Fluorescent quenching was observed when the microspheres were exposed to a trace amount of diethyl chlorophosphate （DCP） in the dispersion. The material and property can be potentially used to fabricate chemosensor in the detection of organophosphates.展开更多
Terpyridine-capped poly（ethylene glycol） （PEG） was synthesized as a novel polymeric ligand and rare earth complex was prepared from Eu（NO3）3 and the telechelic macromolecules. The structure of the complex was ch...Terpyridine-capped poly（ethylene glycol） （PEG） was synthesized as a novel polymeric ligand and rare earth complex was prepared from Eu（NO3）3 and the telechelic macromolecules. The structure of the complex was characterized by 1H NMR, FT-IR, UV-vis and fluores-cence spectroscopy. Strong fluorescent emission of the complex was observed at 593 and 616 nm upon the excitation of 300 nm. The fluo-rescent emission was quenched upon addition of trace amount of diethyl chlorophosphate （DCP）. And the observed Ksv values for DCP were measured to be 0.568×10^3 and 0.89×10^3 L/mol for quenching at 593 and 616 nm, which indicated the detection limit for DCP was about 0.014 mmol/L. These results showed that the terpyridine-lanthanide complex could be an effective chemosensor with a potential application in the detection of organophosphates.展开更多
基金Project supported by Research Foundation of the General Armament Department (2008 CD 012)
文摘Fluorescent microspheres of polystyrene-based Eu（Ⅲ） complexes were prepared from TentaGel resin, 2,6-bisbenzimidazolylpyridine and europium nitrate. The microspheres were characterized by FTIR spectroscopy, elemental analysis, XPS measurements and fluorescence spectroscopy. Characteristic red emission under irradiation of 365 nm light from a hand-held UV lamp was observed for the microspheres either in a solution or solid-state. Fluorescent quenching was observed when the microspheres were exposed to a trace amount of diethyl chlorophosphate （DCP） in the dispersion. The material and property can be potentially used to fabricate chemosensor in the detection of organophosphates.
基金Project supported by Research Foundation of the General Armament Department (2008CD012)
文摘Terpyridine-capped poly（ethylene glycol） （PEG） was synthesized as a novel polymeric ligand and rare earth complex was prepared from Eu（NO3）3 and the telechelic macromolecules. The structure of the complex was characterized by 1H NMR, FT-IR, UV-vis and fluores-cence spectroscopy. Strong fluorescent emission of the complex was observed at 593 and 616 nm upon the excitation of 300 nm. The fluo-rescent emission was quenched upon addition of trace amount of diethyl chlorophosphate （DCP）. And the observed Ksv values for DCP were measured to be 0.568×10^3 and 0.89×10^3 L/mol for quenching at 593 and 616 nm, which indicated the detection limit for DCP was about 0.014 mmol/L. These results showed that the terpyridine-lanthanide complex could be an effective chemosensor with a potential application in the detection of organophosphates.
