Series of reactions reveals how complex carbon chemistry can begin in frigid space

A series of chemical reactions has revealed how complex carbon chemistry can begin in frigid space, challenging the long-held belief that heat is necessary for such reactions. Researchers from FIU and the University of Hawaiʻi at Mānoa found that phenalene, a complex carbon molecule, can form without heat in the extreme cold of space. This discovery suggests that the formation of complex carbon molecules can occur in environments far removed from Earth's typical temperatures. The research was published in The Journal of Physical Chemistry A and provides new insights into how life's building blocks might have originated in the early universe.

The study focused on phenalene, a member of a larger group of carbon molecules called polycyclic aromatic hydrocarbons (PAHs). These molecules are believed to be significant in space, but detecting individual PAHs has been challenging. Mebel and his team used computer modeling to show that phenalene can form through a series of chemical reactions that do not require heat. This process occurs in the cold, dark region known as Taurus Molecular Cloud-1, where solar systems are born. The findings suggest that complex carbon chemistry can begin even before planets form, offering a possible explanation for how life's building blocks might have been created in the early universe.

The discovery of phenalene in space supports the idea that cosmic dust particles can serve as "molecular factories" that help form more complex organic molecules. These molecules, including PAHs, are considered building blocks of life and can be trapped in asteroids and other objects before being carried to young planets through impacts. While the formation of phenalene itself does not create life, it provides crucial information about the chemical processes that could lead to the development of life on Earth. The research highlights the importance of studying how molecules like phenalene form in the extreme conditions of space, contributing to our understanding of the origins of life and the formation of planets.

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