《Table 1 Gelation behaviors of EES in diff erent solvents and solvent parameters analysis》

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《Gelation Mechanism of Erythromycin Ethylsuccinate During Crystallization》

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G，PG，and P represent gelation，partial gelation，and precipitate，respectively

FTIR characterization was performed on the EES crystals and fi bers.The peaks at 1741 and 1698 cm-1 in Curve a of Fig.8 represent the C=O stretching vibration of ester groups and carbonyl of EES，respectively.For fi bers，the former peak shifted to 1736 cm-1，while the latter disappeared，which could have been masked by the former.It was speculated that ester groups participated in the intermolecular hydrogen bonds as H acceptors，accepting H from the solvent molecules to form the EES solvate fi bers.Furthermore，the red shift of C–O–C vibration peaks in the ester groups and glucosidic bonds also imply the participation of these O atoms in the supramolecular self-assembly of EES solvate fi bers as H acceptors（Table S1）.