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Síntesis y caracterización estructural de los primeros tiofosfatos cuaternarios de plutonio: K3Pu4PS42) y APuP2S7 (A

Ryan F Hess¹, Pamela L Gordon, C Drew Tait

¹Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, USA.

Journal of the American Chemical Society

|February 14, 2002

Resumen

Los investigadores sintetizaron los primeros tiofosfatos cuaternarios de plutonio utilizando un método de flujo reactivo. Estos nuevos compuestos de plutonio, caracterizados por la difracción de rayos X, amplían la comprensión de la química del tiofosfato de actinuro.

Área de la Ciencia:

Química del estado sólido.
Química inorgánica y inorgánica.
Ciencia de los materiales ciencia de los materiales.

Sus antecedentes:

Existe un conocimiento limitado con respecto a los tiofosfatos cuaternarios de plutonio.
Los tiofosfatos actinídeos son de interés debido a sus propiedades estructurales y electrónicas únicas.
Estudios previos sobre tiofosfatos actinuros no han explorado las composiciones cuaternarias.

Objetivo del estudio:

Para sintetizar y caracterizar nuevos tiofosfatos cuaternarios de plutonio metálico.
Para investigar la diversidad estructural y la unión en estos nuevos compuestos de plutonio.
Para confirmar el estado de oxidación del plutonio y la presencia de bloques de construcción de tiofosfato.

Principales métodos:

Síntesis a través del método de flujo reactivo.
Caracterización mediante difracción de rayos X de un solo cristal.
Análisis espectroscópico que incluye reflexión difusa y espectroscopia Raman.

Principales resultados:

Se sintetizaron con éxito cuatro nuevos tiofosfatos cuaternarios de plutonio: K ((3) Pu (((PS ((4)) ((2), KPuP ((2) S ((7), RbPuP ((2) S ((7) y CsPuP ((2) S ((7).
Todos los compuestos se cristalizan en el grupo espacial monoclino P2(1)/c.
El compuesto I exhibe una estructura con políedros prismáticos trigonales bicapados PuS(8), mientras que los compuestos II-IV presentan el ligando (P(2)S(7))(4-).

Conclusiones:

La síntesis representa el primer informe de tiofosfatos cuaternarios de plutonio.
Las estructuras caracterizadas revelan entornos de coordinación distintos para el plutonio y diferentes unidades de construcción de tiofosfato.
Los datos espectroscópicos confirman el estado de oxidación de Pu (III) y la integridad de los aniones tiofosfato.

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