Saturated vs. unsaturated hydrocarbon interactions with carbon nanostructures

Area of Science:

• Computational Chemistry
• Materials Science
• Nanotechnology

Background:

• Carbon nanostructures (CNSs), including carbon nanotubes (CNTs) and graphene, exhibit unique properties due to their structure.
• Understanding hydrocarbon interactions with CNSs is crucial for developing novel materials and applications.

Purpose of the Study:

• To investigate the binding interactions between various acyclic and cyclic hydrocarbons (saturated and unsaturated) and CNSs.
• To explore the influence of CNS chirality and curvature on these interactions.
• To provide insights for designing targeted noncovalent interactions involving CNSs.

Main Methods:

• Density Functional Theory (DFT) calculations were employed.
• Model systems of armchair and zigzag carbon nanotubes (CNTs) and graphene were utilized.
• Bader's theory of atoms in molecules was used to characterize noncovalent interactions.

Main Results:

• Acyclic hydrocarbons demonstrated stronger overall binding affinity to CNSs compared to cyclic counterparts.
• Saturated hydrocarbons showed higher binding affinity with acyclic structures, whereas unsaturated hydrocarbons preferred cyclic structures.
• Interactions with graphene were found to be more favorable than with CNTs.

Conclusions:

• The study elucidated contrasting binding behaviors of different hydrocarbon types with CNSs.
• Computational findings align well with existing experimental observations.
• Results offer valuable guidance for the rational design of CNS-based complexes with specific noncovalent interactions.