Regulation of the Metal Center in Lanthanide Nanoparticles to Achieve Multifunctional Sensing
Yefei Jiang1, Ziyi Du1, Hongdeng Qiu2
1Department of Chemistry and Materials and Nanofiber Engineering Center of Jiangxi Province, Jiangxi Normal University, Nanchang 330022, PR China.
Abstract:
Development of a multifunctional sensor is highly desirable. In this work, traces of a carcinoid cancer biomarker of 5-hydroxyindole-3-acetic acid (5-HIAA) in real human urine can be detected by lanthanide nanoparticle Eu-CFC (CFC = 7-chloro-1-cyclopropyl-6-fluoro-4-oxo-1,4-dihydroquinoline-3-carboxylic acid) and the sensing devices of the test paper and agarose gel, achieving an ultralow LOD of 0.8 × 10-3 ppm within a sensing time of 2.0 min. Interestingly, by metal center regulation of Tb and Eu codoping, nanoparticle TbEu-CFC shows high-sensitivity and low-LOD (0.019% v/v) sensing of water in ethanol. The sensing mechanisms are revealed by both experiments and quantum chemical studies.
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