Fluorination-dependent molecular orbital occupancy in ring-shaped perfluorocarbons

Area of Science:

• Physical Chemistry
• Polymer Science
• Biomedicine

Background:

• Perfluorocarbons (PFCs) possess unique chemical properties due to carbon-fluorine bonds.
• PFCs find applications in diverse scientific fields.
• Understanding the electronic structure of PFCs is crucial for their application.

Purpose of the Study:

• To investigate the electronic structure of decalin and perfluorodecalin.
• To compare the spectral data of hydrocarbon and perfluorinated compounds.
• To elucidate the effects of fluorination on molecular orbitals.

Main Methods:

• Soft X-ray absorption and emission spectroscopies were employed.
• Carbon K-edge spectra were measured for liquid decalin and perfluorodecalin.
• Experimental data were compared with theoretical calculations using time-dependent density functional theory.

Main Results:

• A comprehensive electronic structure of decalin was determined.
• Significant molecular orbital changes were observed upon fluorination.
• Spectra of stepwise fluorinated derivatives were analyzed.

Conclusions:

• Fluorination induces a notable shift in molecular orbitals from unoccupied to occupied states.
• Soft X-ray spectroscopy provides detailed insights into electronic structure modifications.
• The study offers a fundamental understanding of perfluorocarbon electronic properties.