State Key Laboratory of Medicinal Chemical Biology and Research Center for Analytical Sciences, College of Chemistry, Nankai University, Tianjin 300071, China.
Talanta. 2012 Sep 15;99:1057-61. doi: 10.1016/j.talanta.2012.07.034. Epub 2012 Jul 24.
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.
掺钕（Nd(3+))纳米材料表现出独特的近红外（NIR）发光特性。然而，Nd 掺杂纳米材料在化学传感器中的应用很少被探索。在此，我们探索了水溶性 2-氨基乙基二氢膦酸稳定的 Nd 掺杂 LaF(3)（ADP-Nd-LaF(3)）纳米粒子作为化学传感器的近红外探针。在各种 pH 值的水溶液中和除铜离子以外的大多数常见金属离子共存的情况下，ADP-Nd-LaF(3)纳米粒子的 1061nm 近红外发射强度保持稳定，因此，ADP-Nd-LaF(3)纳米粒子被开发为一种高选择性的近红外探针用于检测 Cu(II)。ADP-Nd-LaF(3)的近红外发射对 Cu(II)在 5-100μM 的范围内表现出线性猝灭响应，检测限为 0.8μM。对 5μM Cu(II)的 11 次重复检测的精度为 0.5%（RSD）。人尿和废水中加标 Cu(II)的回收率在 102%至 109%之间。还讨论了 Cu(II)诱导 ADP-Nd-LaF(3)纳米粒子荧光猝灭的可能机制。
