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Area of Science:

  • Computational Chemistry
  • Quantum Mechanics
  • Physical Chemistry

Background:

  • Simulating chemical processes requires accounting for nuclear quantum effects and solvent interactions.
  • The nuclear-electronic orbital (NEO) approach models quantum nuclei and electrons.
  • Polarizable continuum models (PCM) represent solvent environments.

Purpose of the Study:

  • To investigate the influence of solvation on nuclear polarization.
  • To analyze how solvent dielectric constant affects nuclear polarization.
  • To explore the interplay between electronic, nuclear, and solvent polarization.

Main Methods:

  • Coupling the nuclear-electronic orbital (NEO) approach with a polarizable continuum model (PCM) to create the NEO-PCM method.
  • Applying the NEO-PCM method to a water dimer and protonated water tetramers.
  • Analyzing changes in proton density and oxygen-hydrogen bond length to quantify nuclear polarization.

Main Results:

  • Solvation enhances nuclear polarization as the dielectric constant of the solvent increases.
  • The internal, hydrogen-bonded proton in a water dimer exhibits greater polarization than the external, free proton.
  • Proton quantization leads to increased solvent polarization due to mutual polarization effects.

Conclusions:

  • The NEO-PCM approach effectively models nuclear quantum effects and solvent environments.
  • Solvation plays a crucial role in enhancing nuclear polarization.
  • A complex interplay exists among electronic, nuclear, and solvent polarization in chemical systems.