Dispersion forces in chirality recognition - a density functional and wave function theory study of diols

Area of Science:

• Physical chemistry
• Computational chemistry
• Biomolecular interactions

Background:

• Chirality recognition traditionally focuses on steric factors and hydrogen bonds.
• The significant size of biomolecules suggests other forces, like dispersion, may be crucial.
• Understanding aggregate formation is key to comprehending chirality recognition.

Purpose of the Study:

• To investigate the role of dispersion forces in the formation and stability of chiral aggregates.
• To explore factors influencing homo- and hetero-dimer formation in diol molecules.
• To compare computational methods for analyzing dispersion effects on chiral structures.

Main Methods:

• Density functional theory (DFT) calculations.
• Analysis using local correlation methods.
• Calculation of dispersion-free gradients using a local orbital-based scheme.

Main Results:

• Dispersion forces significantly affect the energies and structures of chiral aggregates.
• Comparison of DFT and local correlation methods reveals the impact of dispersion.
• Structural differences were observed between dispersion-corrected and uncorrected DFT calculations.

Conclusions:

• Dispersion forces are a critical, often overlooked, factor in chirality recognition.
• Accurate modeling of chiral aggregates requires incorporating dispersion effects.
• Further research into dispersion's role in biomolecular interactions is warranted.