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Researchers in Korea have developed an artificial intelligence (AI) technology that predicts molecular properties by learning electron-level information without requiring costly quantum mechanical calculations. The research was presented at .

A joint research team led by Senior Researcher Gyoung S. Na from the Korea Research Institute of Chemical Technology (KRICT) and Professor Chanyoung Park from the Korea Advanced Institute of Science and Technology (KAIST) has developed a novel AI method—called DELID (Decomposition-supervised Electron-Level Information Diffusion)—that accurately predicts material properties using electron-level information without performing quantum mechanical computations.

The method achieved state-of-the-art prediction accuracy on real-world datasets consisting of approximately 30,000 experimental molecular data.

Traditional computational science and AI methods have been limited in utilizing electron-level information—essential for determining molecular properties—due to the excessive cost of quantum mechanical calculations. As a result, most existing AI models rely solely on atom-level molecular descriptors, leading to limitations in prediction accuracy, particularly for complex molecules.

To address this challenge, the research team devised DELID, a generative AI method that infers the electron-level features of complex molecules by combining information from simpler molecular fragments.

DELID decomposes complex molecules into chemically valid substructures, retrieves electron-level properties of these fragments from quantum chemistry databases, and uses a self-supervised diffusion model to infer the overall electronic structure. This enables accurate property prediction without the need for large-scale quantum mechanical simulations.

Uniquely, DELID allows molecular property prediction using electron-level information without actually performing quantum computations on the target molecule. This represents a significant leap forward, enabling electron-aware predictions without requiring quantum computers.

In benchmark tests on over 30,000 experimentally measured molecular property datasets—including physical, toxicological, and optical properties—DELID achieved the highest accuracy among state-of-the-art models.

In particular, for optical property prediction tasks such as CH-DC and CH-AC, which are relevant to OLED and solar cell material design, existing models typically show low prediction accuracy (31–44%). DELID achieved an accuracy of 88%, more than twice the performance of top existing AI models.

Senior Researcher Na commented, "DELID enables accurate prediction of molecular properties by incorporating electron-level information without the burden of high computational cost, overcoming a major limitation of conventional AI approaches."

KRICT President Dr. Youngkuk Lee added, "We expect DELID to make significant contributions to practical AI applications in chemical industries such as drug discovery, toxicity assessment, and optoelectronic materials development."