fig1

Figure 1. (A) Schematic demonstration for the preparation of D-his-ZIF-8@SiO₂ core−shell microspheres; (B) Comparison of PXRD patterns of the prepared SiO₂−COOH, D-his-ZIF-8, and D-his-ZIF-8@SiO₂; (C) SEM image of D-his-ZIF-8@SiO₂; (D) FT-IR spectra of SiO₂, SiO₂−COOH, D-his-ZIF-8, and D-his-ZIF-8@SiO₂ core−shell microspheres; (E) CD patterns of ZIF-8 (red) and D-his-ZIF-8 (black); (F-H) HPLC chromatograms on the D-his-ZIF-8@SiO₂ column (column A, 25 cm length × 2.1 mm i.d.) for the separation of racemic compounds: trans-stilbene oxide (F), praziquantel (G), and 1-(1-naphthyl)ethanol (H). (A-H) are reprinted with permission from Ref.^[87], Copyright © 2023 by American Chemical Society. PXRD: Powder X-ray diffraction; SEM: scanning electron microscope; FT-IR: Fourier transform infrared spectroscopy; CD: circular dichroism; HPLC: high-performance liquid chromatography.