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Descubrimiento de la molécula quiral interestelar de óxido de propileno (CH3CHCH2O)

Brett A McGuire¹, P Brandon Carroll², Ryan A Loomis³

¹National Radio Astronomy Observatory, Charlottesville, VA 22903, USA. Division of Chemistry and Chemical Engineering, California Institute of Technology Pasadena, CA 91125, USA. bmcguire@nrao.edu pcarroll@caltech.edu.

Science (New York, N.Y.)

|June 16, 2016

Resumen

Los astrónomos detectaron la molécula quiral de óxido de propileno en la región de Sagitario B2, ofreciendo información sobre la evolución química temprana del sistema solar. Este hallazgo marca el primer descubrimiento astronómico de una molécula quiral en un entorno tan primitivo.

Área de la Ciencia:

Astroquímica
Química orgánica
La astronomía

Sus antecedentes:

La vida en la Tierra depende de las moléculas quirales, exhibiendo homociralidad.
Comprender el origen de la homociralidad es crucial para la astrobiología.
Las moléculas quirales son bloques de construcción esenciales para la vida.

Objetivo del estudio:

Para investigar la presencia de moléculas quirales en regiones de formación estelar.
Para explorar los precursores químicos de la vida en el sistema solar temprano.

Principales métodos:

Observación astronómica mediante el uso de radiotelescopios.
Análisis espectral de las líneas de absorción molecular.
Identificación del óxido de propileno (CH3CHCH2O) en el Sagitario B2.

Principales resultados:

Detección de óxido de propileno en fase gaseosa (CH3CHCH2O) en una capa molecular extendida y fría.
Ubicación de la detección: región de formación estelar de Sagitario B2 cerca de cúmulos protostellares masivos.
El óxido de propileno es la primera molécula quiral encontrada en este material del sistema solar en etapa temprana.

Conclusiones:

La presencia de óxido de propileno indica que las moléculas quirales se forman en entornos protoestelares.
Este descubrimiento proporciona un vínculo entre la química interestelar y el origen de la homociralidad en la Tierra.
Los hallazgos ofrecen información sobre el inventario químico del sistema solar primitivo.

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