期刊
MACHINE LEARNING-SCIENCE AND TECHNOLOGY
卷 3, 期 4, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/2632-2153/ac8f1a
关键词
chemical reactions; quantum machine learning; physics-based representation; reaction-based representation
类别
资金
- EPFL
- National Centre of Competence in Research (NCCR) 'Sustainable chemical process through catalysis (Catalysis)' of the Swiss National Science Foundation (SNSF) [180544]
- NCCR 'Materials' Revolution: Computational Design and Discovery of Novel Materials (MARVEL)'
Physics-based representations (QML) can reliably and efficiently infer molecular properties, and we have extended its capabilities to predict reaction properties. By defining reaction representations and utilizing existing molecular representations, we can take multiple molecules participating in a reaction as input. We also introduce a new dataset for benchmarking and evaluating the performance of reaction representations.
Physics-based representations constructed using only atomic positions and nuclear charges (also known as quantum machine learning, QML) allow for the reliable and efficient inference of molecular properties from training data. Chemistry is a science rooted in chemical reactions, naturally involving multiple molecular species. Here, we extend QML's capabilities to include the prediction of reaction properties by defining reaction representations: representations taking as input multiple molecules participating in a reaction, each represented by their corresponding atomic charges and three-dimensional coordinates. Several reaction representations are constructed from established molecular ones and benchmarked on four datasets representative of thermodynamic or kinetic reaction properties. One of these, the Hydroform-22-TS dataset (2350 energy barriers), is introduced as part of this work. The relevant ingredients for a high-performing reaction representation are extracted and used to construct the Bond-Based Reaction Representation ((BR2)-R-2) for the prediction of quantum-chemical properties of chemical reactions. Finally, variations of (BR2)-R-2 with varying representation size vs. performance are provided.
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