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Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/228313
Multi-Modal Constrastive Learning for Chemical Structure Elucidation with VibraCLIP
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Identifying molecular structures from vibrational spectra is central to chemical analysis but remains challenging due to spectral ambiguity and the limitations of single-modality methods. While deep learning has advanced various spectroscopic characterization techniques, leveraging the complementary nature of infrared (IR) and Raman spectroscopies remains largely underexplored. We introduce VibraCLIP, a contrastive learning framework that embeds molecular graphs, IR and Raman spectra into a shared latent space. A lightweight fine-tuning protocol ensures generalization from theoretical to experimental datasets. VibraCLIP enables accurate, scalable, and data-efficient molecular identification, linking vibrational spectroscopy with structural interpretation. This tri-modal design captures rich structure–spectra relationships, achieving Top-1 retrieval accuracy of 81.7% and reaching 98.9% Top-25 accuracy with molecular mass integration. By integrating complementary vibrational spectroscopic signals with molecular representations, VibraCLIP provides a practical framework for automated spectral analysis, with potential applications in fields such as synthesis monitoring, drug development, and astrochemical detection.
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ROCABERT ORIOLS, Pau, et al. Multi-Modal Constrastive Learning for Chemical Structure Elucidation with VibraCLIP. Digital Discovery. 2025. Vol. 12, num. 3818-3827. ISSN 2635-098X. [consulted: 11 of August of 2026]. Available at: https://hdl.handle.net/2445/228313