ResearchResearch paperReinforcement Learning · Computer Vision · Robotics & Embodied AI1 source · Oct 20, 2026

Learning Inter-Graph Interactions Between Heterogeneous Substructures of Chemical Systems

We propose a data descriptor of the complex chemical systems and a graph neural network for learning inter-graph interactions between organic and inorganic compounds.

Key points

  • Complex chemical systems containing heterogeneous substructures are common in real-world applications.
  • However, existing graph representation learning methods for inter-graph interactions assumed graph-level interactions between homogeneous structures, such as organic molecules and inorganic crystalline materials.
  • We applied the proposed method to predict the physical properties of hybrid solar cell materials containing heterogeneous substructures, which have received significant attention for sustainable energy resources.
  • By learning heterogeneous inter-graph interactions, the proposed method achieved state-of-the-art accuracy in predicting band gaps of 1,682 hybrid solar cell materials.

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