Prebiotic phosphorus chemistry reconsidered

Area of Science:

• * Origin of life studies
• * Geochemistry
• * Astrobiology

Background:

• * Evidence suggests life originated on Earth earlier than 3.5 billion years ago.
• * Chemical evolution preceding life's origin is difficult to estimate.
• * Both internal (endogenic) and external (exogenic) sources for chemical evolution are considered.

Purpose of the Study:

• * To explore the chemical evolution leading to the origin of life.
• * To investigate the role of phosphorus chemistry in early Earth environments.
• * To propose a scenario for the production of reactive phosphorus compounds.

Main Methods:

• * Analysis of available evidence on early Earth conditions.
• * Consideration of endogenic and exogenic contributions to chemical evolution.
• * Theoretical modeling of early phosphorus chemistry.

Main Results:

• * Early Earth's hydrosphere phosphorus chemistry was likely dominated by less oxidized compounds than phosphoric acid.
• * A scenario for producing reactive phosphonic acid derivatives is presented.
• * These compounds may have preceded the formation of biophosphates.

Conclusions:

• * The origin of life occurred substantially earlier than 3.5 billion years ago.
• * Early phosphorus chemistry, potentially involving phosphonic acids, played a crucial role in pre-biotic evolution.
• * Understanding early phosphorus chemistry is key to understanding life's origins.