Polarizable continuum model study of solvent effects on electronic circular dichroism parameters

Area of Science:

• Computational Chemistry
• Spectroscopy
• Physical Chemistry

Background:

• Electronic Circular Dichroism (ECD) spectroscopy is sensitive to molecular structure and environment.
• Solvent effects significantly influence ECD spectra, but accurate theoretical prediction remains challenging.
• Understanding solvent-solute interactions is crucial for interpreting ECD data.

Purpose of the Study:

• To implement and validate a polarizable continuum model for calculating solvent effects on ECD spectra.
• To assess the accuracy of the model by comparing theoretical predictions with experimental results for various organic molecules.
• To provide a reliable computational tool for studying solvent effects in chiral molecules.

Main Methods:

• Density Functional Theory (DFT) in the length-gauge formulation was employed.
• Gauge-origin independence was ensured using London atomic orbitals.
• The polarizable continuum model (PCM) was implemented to simulate solvent effects.

Main Results:

• Calculations were performed for methyloxirane and several bicyclic ketones (camphor, norcamphor, norbornenone, fenchone).
• The implemented model successfully reproduced experimental observations of solvent effects on ECD spectra.
• Theoretical predictions showed good agreement with experimental data for the studied compounds.

Conclusions:

• The developed computational approach provides an accurate method for predicting solvent effects on ECD spectra.
• This implementation of the polarizable continuum model is a valuable tool for computational chemists studying chiral molecules.
• The findings facilitate a deeper understanding of solvent-solute interactions in spectroscopy.