Molecular dynamics with constrained nuclear electronic orbital density functional theory: Accurate vibrational spectra from efficient incorporation of nuclear quantum …

X Xu, Z Chen, Y Yang - Journal of the American Chemical Society, 2022 - ACS Publications
Nuclear quantum effects play a crucial role in many chemical and biological systems
involving hydrogen atoms yet are difficult to include in practical molecular simulations. In this …

Vibrational Spectra of Highly Anharmonic Water Clusters: Molecular Dynamics and Harmonic Analysis Revisited with Constrained Nuclear-Electronic Orbital Methods

Y Zhang, Y Wang, X Xu, Z Chen… - Journal of Chemical …, 2023 - ACS Publications
Vibrational spectroscopy is widely used to gain insights into structural and dynamic
properties of chemical, biological, and materials systems. Thus, an efficient and accurate …

Describing proton transfer modes in shared proton systems with constrained nuclear–electronic orbital methods

Y Zhang, X Xu, N Yang, Z Chen, Y Yang - The Journal of Chemical …, 2023 - pubs.aip.org
Proton transfer is crucial in various chemical and biological processes. Because of
significant nuclear quantum effects, accurate and efficient description of proton transfer …

Constrained nuclear-electronic orbital density functional theory with a dielectric continuum solvent model

X Xu - The Journal of Physical Chemistry A, 2023 - ACS Publications
Solvent effects are crucial for simulating chemical and biological processes in solutions. The
continuum solvation model is widely used for incorporating solvent effects with different …

Incorporating nuclear quantum effects in molecular dynamics with a constrained minimized energy surface

Z Chen, Y Yang - The Journal of Physical Chemistry Letters, 2023 - ACS Publications
The accurate incorporation of nuclear quantum effects in large-scale molecular dynamics
(MD) simulations remains a significant challenge. Recently, we combined constrained …

Calculating vibrational excited state absorptions with excited state constrained minimized energy surfaces

Y Wang, Z Chen, Y Yang - The Journal of Physical Chemistry A, 2023 - ACS Publications
The modeling and interpretation of vibrational spectra are crucial for studying reaction
dynamics using vibrational spectroscopy. Most prior theoretical developments focused on …

Where is the Hidden Intramolecular H-bonding Vibrational Signal in Proline?

J Langford, Y Zhang, Z Chen, Y Yang - 2023 - chemrxiv.org
The frequency of the hydrogen bonded OH stretch vibration in proline has sparked
controversy. Employing constrained nuclear electronic orbital methods developed by our …

Nucleus–electron correlation revising molecular bonding fingerprints from the exact wavefunction factorization

Z Chen, J Yang - The Journal of Chemical Physics, 2021 - pubs.aip.org
We present a novel theory and implementation for computing coupled electronic and
quantal nuclear subsystems on a single potential energy surface, moving beyond the …

Where is the Hidden Intramolecular H-bonding Vibrational Signal in the Proline Matrix IR Spectrum?

J Langford, Y Zhang, Z Chen, Y Yang - 2024 - chemrxiv.org
The assignment of the hydrogen bonded OH stretch vibration in the proline matrix IR
spectrum has sparked controversy. Employing constrained nuclear electronic orbital …

Constrained Nuclear-Electronic Orbital QM/MM Approach for Simulating Complex Systems with Quantum Nuclear Delocalization Effects Incorporated

X Zhao, Z Chen, Y Yang - 2024 - chemrxiv.org
The hybrid quantum mechanics/molecular mechanics (QM/MM) approach, which combines
the accuracy of quantum mechanical (QM) methods with the efficiency of molecular …