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La superficie de las microgotas de agua pesada enriquece las impurezas isotópicas más ligeras

Abhijit Nandy¹, Supratim Mondal¹, Debasish Koner²

¹Department of Chemistry, Indian Institute of Science Education and Research Tirupati, Tirupati 517507, India.

Journal of the American Chemical Society

|July 3, 2024

Resumen

Las microgotas de agua muestran fraccionamiento de isotopólogos de agua pesada (D2O). Las impurezas de agua más ligeras se evaporan preferentemente, enriqueciendo la superficie de las gotas e influyendo en las reacciones químicas.

Área de la Ciencia:

Química Física
Química analítica
Ciencias de la superficie

Sus antecedentes:

Las microgotas de agua facilitan reacciones interfaciales únicas.
La estructura interfacial de las microgotas y su efecto en la química siguen sin estar claros.

Objetivo del estudio:

Para investigar el fraccionamiento en gotas de isotopólogos de agua.
Comprender la influencia de la estructura interfacial del agua en las reacciones químicas.

Principales métodos:

Atomización por pulverización sónica de soluciones de agua pesada (D2O).
Espectrometría de masas (EM) para la desorción del analito y el análisis del vapor.
Seguimiento de la oxidación de Dakin en microgotas binarias de D2O/H218O.

Principales resultados:

Los analíticos se desorbían como especies protonadas, no deuteradas.
La oxidación de Dakin mostró preferencia por el H216O sobre el H218O.
Impuridades isotópologas de agua más ligeras (HOD/H2O) evaporadas preferentemente de las microgotas de D2O.

Conclusiones:

Pruebas de fraccionamiento en gotas de isotopólogos de agua.
El enriquecimiento superficial de isotopólogos de agua más ligeros afecta la química de la interfaz.
Potencial para la separación isotópica del agua basada en microgotas.

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