Machine learning accelerates quantum mechanics predictions of molecular crystals

Y Han, I Ali, Z Wang, J Cai, S Wu, J Tang, L Zhang… - Physics Reports, 2021 - Elsevier
Quantum mechanics (QM) approaches (DFT, MP2, CCSD (T), etc.) play an important role in
calculating molecules and crystals with a high accuracy and acceptable efficiency. In recent …

An integral-direct GOSTSHYP algorithm for the computation of high pressure effects on molecular and electronic structure

A Pausch, F Zeller, T Neudecker - Journal of chemical theory and …, 2025 - ACS Publications
To simulate the effects of high pressure on molecular and electronic structure, methods
based on the polarizable continuum model have emerged as a serious contender to the …

Hydrogen bonding in liquid ammonia

A Krishnamoorthy, K Nomura, N Baradwaj… - The Journal of …, 2022 - ACS Publications
The nature of hydrogen bonding in condensed ammonia phases, liquid and crystalline
ammonia has been a topic of much investigation. Here, we use quantum molecular …

Using Conformational Sampling to Model Spectral and Structural Changes of Molecules at Elevated Pressures

F Zeller, P Pracht, T Neudecker - The Journal of Physical …, 2025 - ACS Publications
Conformational sampling is nowadays a standard routine in computational chemistry. Within
this work, we present a method to perform conformational sampling for systems exposed to …

On the importance of low-frequency modes in predicting pressure-induced phase transitions

A Hoser, A Zwolenik, A Makal - Physical Chemistry Chemical Physics, 2024 - pubs.rsc.org
The occurrence of ultra-low frequency oscillation mode as observed by means of periodic
DFT calculations at Γ point in a molecular crystal at ambient conditions can be a valuable …

Vibrational Dynamics and Phase Transitions of Hydrazine to 50 GPa

R Ripani, SA Gramsch, F Safari, M Ahart, Z Liu… - ACS …, 2025 - ACS Publications
The high pressure behavior of hydrazine, N2H4, has been investigated to 50 GPa at room
temperature using infrared and Raman spectroscopy to explore pressure induced phase …

A Journey with THeSeuSS: Automated Python Tool for Modeling IR and Raman Vibrational Spectra of Molecules and Solids

A Boziki, FN Mebenga, P Fernandes… - arxiv preprint arxiv …, 2024 - arxiv.org
Vibrational spectroscopy is an indispensable analytical tool that provides structural
fingerprints for molecules, solids, and interfaces thereof. This study introduces THeSeuSS …

Stability and phase transition investigation of olanzapine polymorphs

J Tang, Y Han, I Ali, H Luo, A Nowak, J Li - Chemical Physics Letters, 2021 - Elsevier
We use electrical embedded-fragment QM method with both DFT/ωB97XD/6-31G* and
MP2/6-31G* to investigate the phase transformations of olanzapine. Gibbs free energy …

Prediction of properties from first principles with quantitative accuracy: Six representative ice phases

Q Lu, I Ali, J Li - New Journal of Chemistry, 2020 - pubs.rsc.org
High-pressure ice is an important part of the Earth's crust and an important research target
for the exploration of outer space. The significant changes of intermolecular distance in ice …

Ab initio phase transition prediction for ices XV/XIV/VIII at high pressures and low temperatures

R **ao, L Huang, Y Han, J Liu, J Li - Chemical Physics Letters, 2020 - Elsevier
Phase transitions of ices XIV, XV and XIV have not been confirmed by experiment or high-
precision theory due to the kinetic barriers. We use ab initio method to calculate the Gibbs …