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. 2026 Jun 17;12(25):eaed5675. doi: 10.1126/sciadv.aed5675

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Fig. 3. — (A) Prediction of solvents that selectively dissolve PSf using HSPs. (B) Schematic diagram of the synchrotron radiation facility and in situ high-temperature (HT) infrared (IR) spectrometry. (C to E) In situ HT-IR spectra to investigate the interaction between catalyst and solvent, and the catalytic depolymerization pathways of the model compound (Mode) in various solvents. EG, ethylene glycol; EG-d₄, deuterated ethylene glycol–d₄. (F to H) Mass spectra and corresponding chemical structures of depolymerization products of the Mode and PET substrate in deuterated and nondeuterated solvents. m/z, mass/charge ratio.