Polyfluorides and Neat Fluorine as Host Material in Matrix-Isolation Experiments

Area of Science:

• Inorganic Chemistry
• Spectroscopy
• Cryogenics

Background:

• Matrix isolation spectroscopy is crucial for studying reactive species.
• Fluorine's high reactivity presents challenges for its use as a matrix gas.

Purpose of the Study:

• To investigate the use of neat fluorine in matrix isolation.
• To characterize novel metal fluorides and polyfluoride anions formed in solid fluorine.

Main Methods:

• Matrix isolation spectroscopy at cryogenic temperatures (5 K).
• Infrared (IR) spectroscopy for characterization.
• IR-laser ablation of metal atoms in neat fluorine.

Main Results:

• Purification and spectroscopic data for fluorine as a matrix gas.
• Formation and characterization of CrF5, PdF2, AuF5, and PrF4.
• Observation of polyfluoride monoanions, including [F5](-) with characteristic IR bands.

Conclusions:

• Neat fluorine is a viable matrix gas for studying reactive species.
• New metal fluorides and polyfluoride anions were successfully synthesized and characterized.
• The study provides insights into fluorine chemistry under cryogenic conditions.