A terbium(III)-functionalized zinc(II)-organic framework for fluorometric determination of phosphate
| Autor: | Meng Tian, Qingcai Yu, Chuan Fan, Xiaoxia Lv, Guodong Liu, Yueyuan Mao, Hua Wang, Wanwei Qiu |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Lanthanide
Tris chemistry.chemical_element Terbium 02 engineering and technology Zinc 010402 general chemistry 01 natural sciences Phosphates Analytical Chemistry chemistry.chemical_compound Fluorometry Methylene Metal-Organic Frameworks Fluorescent Dyes Detection limit fungi 021001 nanoscience & nanotechnology Phosphate Fluorescence 0104 chemical sciences chemistry 0210 nano-technology Nuclear chemistry |
| Zdroj: | Microchimica Acta. 187 |
| ISSN: | 1436-5073 0026-3672 |
| DOI: | 10.1007/s00604-019-4066-5 |
| Popis: | A terbium(III)-functionalized zinc(II)-organic framework (Tb-MOF-Zn) is shown to be a viable fluorescent probe for phosphate. The organic ligands 4,4′,4″-[((2,4,6-trimethylbenzene-1,3,5-triyl)tris(methylene))tris(oxy)]tribenzoic acid (H3L3) contains multiple carboxyl groups that can react with zinc(II) to yield tubular MOF-Zn. The MOF-Zn was further functionalized with Tb(III) to produce a lanthanide composite of type Tb-MOF-Zn which displays strong fluorescence with excitation/emission maxima at 285/544 nm. Fluorescence is quenched by phosphate because of the specific interaction with Tb(III) in Tb-MOF-Zn. The concentration of Tb-MOF-Zn, reaction time and pH value of the solution were optimized. Fluorescence drops linearly in the 0.01 to 200.0 μM phosphate concentration range, and the detection limit is 4.0 nM. The fluorescent probe was also used to prepare a microdot array on a glass slide for visual detection of phosphate under illumination with UV light. |
| Databáze: | OpenAIRE |
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