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Qubits quirales moleculares 4f por posfuncionalización

Steen H Hansen¹, Christian D Buch¹, Bela E Bode²

¹Department of Chemistry, University of Copenhagen Universitetsparken 5 2100 Denmark piligkos@chem.ku.dk.

Inorganic chemistry frontiers

|September 3, 2025

Resumen

Los investigadores sintetizaron complejos de iterbio enantioméricamente puros utilizando aminas quirales. Estos complejos quirales de iterbio exhiben propiedades espectroscópicas distintas y largos tiempos de coherencia de espín electrónico, cruciales para aplicaciones cuánticas.

Área de la Ciencia:

Química de coordinación
Ciencias de los materiales
Ciencia de la información cuántica

Sus antecedentes:

Los complejos de lantánidos quirales son de interés para aplicaciones ópticas y magnéticas.
El control de la quiralidad y las propiedades electrónicas de los complejos de lantánidos es esencial para el desarrollo de materiales avanzados.

Objetivo del estudio:

Síntesis y caracterización de complejos de iterbio enantioméricamente puro.
Investigar las propiedades espectroscópicas y de espín de estos complejos quirales de iterbio.

Principales métodos:

Post-funcionalización de un complejo Yb(III) padre a través de la condensación con una amina quiral.
Difracción de rayos X de cristal único y polvo para la caracterización estructural.
Infrarrojo cercano (NIR) dicroísmo circular (CD) y espectroscopia de absorción.
Espectroscopia de resonancia paramagnética electrónica (EPR) de pulso de banda X en cristales únicos diluidos magnéticamente.

Principales resultados:

Síntesis exitosa de un par enantiomérico de complejos Yb (III), confirmada por difracción de rayos X en el grupo espacial P212121 con parámetros de Flack cercanos a cero.
Observación de fuertes transiciones f-f en los espectros NIR CD y de absorción, lo que indica un entorno de iterbio quiral con valores de g_abs de hasta 0,07.
La espectroscopia EPR reveló un tiempo de memoria de fase (T_m) de 600 ns para el espín electrónico y demostró una manipulación coherente a través de pulsos de microondas (notaciones de Rabi).

Conclusiones:

Los complejos de Yb (III) enantioméricamente puros se pueden sintetizar a través de la posfuncionalización.
Estos complejos quirales poseen propiedades ópticas únicas y exhiben una larga coherencia de espín, lo que los hace prometedores para las tecnologías cuánticas.
El estudio destaca el potencial de los complejos de lantánidos quirales en áreas como la computación cuántica y la detección.

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