Molecular spinning top: visualizing the dynamics of M₃N@C₈₀ with variable temperature single crystal X-ray...

Area of Science:

• Solid-state chemistry
• Materials science
• Crystallography

Background:

• Endohedral fullerenes, specifically M3N@C80, are molecular structures with potential applications in materials science.
• Understanding the dynamic behavior of these encapsulated clusters and cages is crucial for designing novel materials.

Purpose of the Study:

• To investigate the temperature-dependent dynamics of the M3N cluster and C80 cage within single crystals of M3N@C80·NiOEP·2(C6H6).
• To elucidate the rotational behavior of the endohedral fullerene complex relative to its surrounding static molecule.

Main Methods:

• Variable temperature X-ray diffraction was performed on single crystals of Ho2LuN@C80·NiOEP·2(C6H6) and Lu3N@C80·NiOEP·2(C6H6).
• Analysis focused on structural changes and rotational motion as a function of temperature.

Main Results:

• The M3N cluster and the C80 fullerene cage exhibit temperature-dependent rotation.
• This rotation occurs around the static Nickel octaethylporphyrin (NiOEP) molecule within the crystal lattice.
• Structural data indicates a dynamic interplay between the encapsulated species and the host molecule.

Conclusions:

• The study demonstrates the dynamic nature of endohedral M3N@C80 complexes in the solid state.
• Temperature is a key factor influencing the rotational freedom of the M3N cluster and C80 cage.
• These findings provide insights into the molecular motion within functionalized fullerene materials.