title: The stable and water-soluble neodymium-doped lanthanide fluoride nanoparticles for near infrared probing of copper ion.
abstract: Neodymium (Nd(3+)) doped nanomaterials exhibited the unique near infrared (NIR) luminescence properties. However, the application of Nd-doped nanomaterials to chemosensors was rarely explored. Herein, the water-soluble 2-aminoethyl dihydrogen phosphate stabilized Nd-doped LaF(3) (ADP-Nd-LaF(3)) nanoparticles were explored as the NIR probe for chemosensors. The NIR emission intensity at 1061 nm of ADP-Nd-LaF(3) nanoparticles kept stable in the aqueous solution of various pH and coexisting of most common metal ions except copper ion, consequently, the ADP-Nd-LaF(3) nanoparticles were developed as a high selective NIR probe for Cu(II). The NIR emission of ADP-Nd-LaF(3) exhibits a linear quenching response to Cu(II) in the range 5-100 μM, with a detection limit of 0.8 μM. The precision of eleven replicate detections of 5 μM Cu(II) was 0.5% (RSD). The recovery of spiked Cu(II) in human urine and waste water samples ranged from 102 to 109%. The possible mechanism of Cu(II)-induced fluorescence quenching of ADP-Nd-LaF(3) nanoparticles was also discussed.
authors.affiliation: State Key Laboratory of Medicinal Chemical Biology and Research Center for Analytical Sciences, College of Chemistry, Nankai University, Tianjin 300071, China.
authors.forename: Fang-Min
authors.initials: FM
authors.lastname: Xue
authors.forename: He-Fang
authors.initials: HF
authors.lastname: Wang
mesh_terms: D000328:Adult; D002623:Chemistry Techniques, Analytical / Q000295:instrumentation*; D003300:Copper / Q000032:analysis* / Q000737:chemistry; D005459:Fluorides / Q000737:chemistry*; D006801:Humans; D007259:Infrared Rays; D053758:Nanoparticles / Q000737:chemistry*; D009354:Neodymium / Q000737:chemistry*; D010755:Organophosphates / Q000737:chemistry; D012995:Solubility; D013050:Spectrometry, Fluorescence; D014867:Water / Q000737:chemistry*
chemical_list: C526585:2-aminoethyl phosphate; D010755:Organophosphates; D014867:Water; D009354:Neodymium; D003300:Copper; D005459:Fluorides