Estimating Binding Energies of π-Stacked Aromatic Dimers Using Force Field-Driven Molecular Dynamics

Area of Science:

• Physical Chemistry
• Computational Chemistry
• Materials Science

Background:

• Pi-pi stacking interactions are fundamental in chemistry and biology.
• Accurate calculation of these interactions is computationally demanding using traditional quantum chemical methods.

Purpose of the Study:

• To develop a computationally efficient method for estimating pi-pi stacking binding energies.
• To validate a novel steered molecular dynamics (SMD) approach using force field parameters.

Main Methods:

• Utilized steered molecular dynamics (SMD) simulations.
• Employed force field parameters for accurate energy calculations.
• Compared results with Density Functional Theory (DFT) calculations (ωB97X-D3/cc-pVQZ).

Main Results:

• The force field-driven SMD method provides binding energy estimations with good agreement compared to DFT.
• Demonstrated the applicability of the method to various aromatic molecules.
• Achieved reasonable precision in reporting pi-pi stacking energy values.

Conclusions:

• The developed SMD method is a computationally efficient and accurate tool for studying pi-pi stacking.
• This approach offers valuable insights into the complex nature of aromatic interactions.
• The method facilitates broader investigation of stacking phenomena in diverse molecular systems.