Luminiscencia de un enrejado metal orgánico de plata(I) con ácido piromelítico dopado con terbio(III)

  • Silvia Elena Castillo Blum Facultad de Química, Universidad Nacional Autónoma de México
  • José Antonio Robles Aguilera
  • Leonardo Enrique Cruz Estrada
  • Marcos Flores Álamo
Palabras clave: Enrejado metal orgánico, plata(I), luminiscencia, terbio(III), estructura cristalina

Resumen

Se sintetizó un polímero de coordinación tipo MOF ([Ag4btec]n), a partir de nitrato de plata(I) y ácido piromelítico (H4btec), mediante un método modificado en el que se precipitó el material. El objetivo de este estudio fue usar este MOF como antena para aumentar la intensidad de emisión del ion Tb3+. Se analizaron las propiedades luminiscentes del MOF, obteniendo sus espectros de absorción, excitación y emisión en estado sólido, y posteriormente se dopó empleando diferentes proporciones estequiométricas de nitrato de terbio(III) pentahidratado. Se caracterizaron los nuevos materiales mediante difracción de rayos X de polvos y monocristal (sólo del MOF), resonancia magnética nuclear de 13C en estado sólido, espectroscopía IR, análisis elemental. El MOF obtenido como polvo microcristalino y el monocristal presentan la misma fase cristalográfica. Mejoró la luminiscencia del ion Tb3+ en el MOF dopado con este ion, siendo la proporción de dopaje más emisiva aquella donde el Tb3+ se encuentra en la proporción molar de 0.4:1.0 (Ln3+:MOF). Esto es relevante ya que al dopar el material se utiliza una mínima cantidad de ion lantánido, haciendo el material más económico.

Citas

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Publicado
2026-08-26
Sección
Artículos de Investigación