Accurate modeling of the potential energy surface of atmospheric molecular clusters boosted by neural networks

TY - JOUR

T1 - Accurate modeling of the potential energy surface of atmospheric molecular clusters boosted by neural networks

AU - Kubečka, Jakub

AU - Ayoubi, Daniel

AU - Tang, Zeyuan

AU - Knattrup, Yosef

AU - Engsvang, Morten

AU - Wu, Haide

AU - Elm, Jonas

PY - 2024/8/13

Y1 - 2024/8/13

N2 - The computational cost of accurate quantum chemistry (QC) calculations of large molecular systems can often be unbearably high. Machine learning offers a lower computational cost compared to QC methods while maintaining their accuracy. In this study, we employ the polarizable atom interaction neural network (PaiNN) architecture to train and model the potential energy surface of molecular clusters relevant to atmospheric new particle formation, such as sulfuric acid-ammonia clusters. We compare the differences between PaiNN and previous kernel ridge regression modeling for the Clusteromics I-V data sets. We showcase three models capable of predicting electronic binding energies and interatomic forces with mean absolute errors of <0.3 kcal mol−1 and <0.2 kcal mol−1 Å−1, respectively. Furthermore, we demonstrate that the error of the modeled properties remains below the chemical accuracy of 1 kcal mol−1 even for clusters vastly larger than those in the training database (up to (H2SO4)15(NH3)15 clusters, containing 30 molecules). Consequently, we emphasize the potential applications of these models for faster and more thorough configurational sampling and for boosting molecular dynamics studies of large atmospheric molecular clusters.

AB - The computational cost of accurate quantum chemistry (QC) calculations of large molecular systems can often be unbearably high. Machine learning offers a lower computational cost compared to QC methods while maintaining their accuracy. In this study, we employ the polarizable atom interaction neural network (PaiNN) architecture to train and model the potential energy surface of molecular clusters relevant to atmospheric new particle formation, such as sulfuric acid-ammonia clusters. We compare the differences between PaiNN and previous kernel ridge regression modeling for the Clusteromics I-V data sets. We showcase three models capable of predicting electronic binding energies and interatomic forces with mean absolute errors of <0.3 kcal mol−1 and <0.2 kcal mol−1 Å−1, respectively. Furthermore, we demonstrate that the error of the modeled properties remains below the chemical accuracy of 1 kcal mol−1 even for clusters vastly larger than those in the training database (up to (H2SO4)15(NH3)15 clusters, containing 30 molecules). Consequently, we emphasize the potential applications of these models for faster and more thorough configurational sampling and for boosting molecular dynamics studies of large atmospheric molecular clusters.

UR - http://www.scopus.com/inward/record.url?scp=85201745434&partnerID=8YFLogxK

U2 - 10.1039/d4va00255e

DO - 10.1039/d4va00255e

M3 - Journal article

C2 - 39176037

SN - 2754-7000

VL - 3

SP - 1438

EP - 1451

JO - Environmental science: Advances

JF - Environmental science: Advances

IS - 10

ER -