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Quebramiento de la simetría quiral ubicua de polímeros conjugados a través de la separación de fase líquido-líquido
Zhuang Xu1, Ziming Wang1, Rui Zhang1
1Department of Chemical and Biomolecular Engineering, Department of Chemistry, Department of Materials Science and Engineering, Beckman Institute for Advanced Science and Technology, University of Illinois Urbana-Champaign,Urbana, Illinois 61801, United States.
Journal of the American Chemical Society
|September 8, 2025
Resumen
La ruptura de simetría quiral, crucial en la ciencia, ahora puede ocurrir espontáneamente en polímeros no quirales a través de la separación de fase líquido-líquido impulsada por entropía (LLPS). Este descubrimiento abre nuevas vías para la electrónica quiral y entender los orígenes de la vida.
Área de la Ciencia:
- Química
- Ciencias de los materiales
- La biofísica
Sus antecedentes:
- La ruptura espontánea de la simetría quiral es un proceso fundamental en múltiples disciplinas científicas.
- Por lo general, la ruptura de la simetría quiral requiere una quiralidad molecular inherente o influencias quirales externas.
- Su aparición en los sistemas achirales es excepcionalmente rara y poco conocida.
Objetivo del estudio:
- Para descubrir un nuevo mecanismo ubicuo para la ruptura espontánea de la simetría quiral en polímeros conjugados achirales.
- Investigar el papel de la entropía y la separación de fase líquido-líquido (LLPS) en este fenómeno.
- Para identificar las características moleculares que rigen este conjunto quiral.
Principales métodos:
- Investigó la ruptura de simetría quiral en 35 polímeros conjugados diferentes.
- Se utiliza la separación de fase líquido-líquido (LLPS) de las mesofasas liotrópicas.
- Aprendizaje automático empleado para identificar determinantes moleculares clave.
- Los hallazgos validados a través de posteriores experimentos de diseño molecular.
Principales resultados:
- Se observó una ruptura de simetría quiral espontánea en 22 de los 35 polímeros conjugados sin fuentes quirales.
- Se ha demostrado que los conjuntos quirales se forman a través de LLPS impulsados por entropía a partir de soluciones isotrópicas.
- El aprendizaje automático predijo e identificó con éxito las características moleculares críticas responsables del fenómeno.
Conclusiones:
- Se ha descubierto un nuevo mecanismo de ruptura de simetría quiral impulsado por LLPS en polímeros conjugados achirales.
- Este fenómeno omnipresente tiene implicaciones significativas para comprender los orígenes de la homociralidad en la vida.
- Los hallazgos establecen una nueva frontera para el desarrollo de electrónica quiral avanzada.
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