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Marco metálico-orgánico selectivo, de respuesta rápida y regenerable para la toma de muestras de los niveles

Fatmah Mish Ebrahim¹, Tu N Nguyen¹, Serhii Shyshkanov^1,2

¹Laboratory of Molecular Simulation (LSMO) and ‡Electronic Workshop, Institut des Sciences et Ingénierie Chimiques (ISIC) , Ecole Polytechnique Fédérale de Lausanne (EPFL Valais) , Rue de l'Industrie 17 , 1951 Sion , Switzerland.

Journal of the American Chemical Society

|February 12, 2019

Resumen

Los investigadores desarrollaron SION-105, un marco metal-orgánico reutilizable, para detectar el fluoruro (F-) en el agua. Esta innovación ofrece un método fiable para controlar la contaminación por fluoruro, crucial para la salud pública y la prevención de la fluorosis esquelética.

Área de la Ciencia:

Ciencias de los materiales
Ciencias del medio ambiente
Química analítica

Sus antecedentes:

La contaminación por fluoruro (F-) en el agua potable por encima de 1,5 ppm causa graves problemas de salud, incluida la fluorosis esquelética, endémica en más de 25 países.
Los métodos existentes para detectar la contaminación por fluoruro a menudo son costosos, inaccesibles o no se pueden reutilizar fácilmente.
El desarrollo de técnicas de muestreo de agua asequibles y fiables para F- es fundamental para la salud pública mundial.

Objetivo del estudio:

Desarrollar un nuevo material reutilizable para la detección de iones fluoruro en soluciones acuosas.
Para integrar este material en un dispositivo portátil para el muestreo remoto de agua.
Para validar el rendimiento del dispositivo con los métodos analíticos establecidos.

Principales métodos:

Se sintetizó un marco metálico orgánico luminiscente basado en lantánidos, SION-105, con un sitio receptor de boro.
Se caracterizaron las interacciones específicas y electrostáticas de SION-105 con F-.
Se construyó un dispositivo de muestreo portátil que incorporaba el SION-105 y se probó con muestras naturales de agua subterránea.

Principales resultados:

SION-105 demostró una detección efectiva de F- en soluciones acuosas a través de interacciones estructurales específicas.
El material exhibió una alta regenerabilidad, utilizable durante más de 10 ciclos, superando a muchos sensores existentes.
El dispositivo portátil mostró una excelente concordancia con el análisis de cromatografía iónica para las concentraciones de F- en las aguas subterráneas de tres países.

Conclusiones:

SION-105 representa un avance significativo en los materiales de detección de fluoruro reutilizables.
El dispositivo portátil desarrollado ofrece una herramienta fiable y accesible para el monitoreo de la contaminación por F en diversos entornos ambientales.
Esta tecnología tiene el potencial de mejorar la salud pública al permitir una evaluación generalizada y asequible de la calidad del agua.

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