Damped Response Theory in Combination with Polarizable Environments: The Polarizable Embedding Complex Polarization...

Area of Science:

• Computational chemistry
• Quantum chemistry
• Spectroscopy

Background:

• Calculating response properties for large, complex systems is computationally challenging.
• Existing methods may not adequately capture environmental effects or near-resonant phenomena.

Purpose of the Study:

• To develop a novel computational method combining polarizable embedding (PE) and complex polarization propagator (CPP) for enhanced response property calculations.
• To enable accurate calculations of relaxation effects in large molecular systems.

Main Methods:

• Implementation of the PE-CPP method within a Kohn-Sham density functional theory (KS-DFT) framework.
• Utilizing the strengths of PE for electrostatic potential and polarization, and CPP for near-resonant effects.

Main Results:

• Successful implementation of the PE-CPP model.
• Pilot calculations demonstrate accuracy for UV/vis and carbon K-edge X-ray absorption spectra of plastocyanin.
• The method effectively handles large and complex molecular systems.

Conclusions:

• The PE-CPP method offers a powerful approach for calculating response properties, including relaxation, in complex systems.
• This advancement facilitates more accurate spectroscopic predictions for biomolecules and other large systems.