The Molecular Pathway to ZIF-7 Microrods Revealed by In Situ Time-Resolved Small- and Wide-Angle X-Ray Scattering, Quick-Scanning Extended X-Ray Absorption Spectroscopy, and DFT Calculations

We present an in situ small‐ and wide‐angle X‐ray scattering (SAXS/WAXS) and quick‐scanning extended X‐ray absorption fine‐structure (QEXAFS) spectroscopy study on the crystallization of the metal–organic framework ZIF‐7. In combination with DFT calculations, the self‐assembly and growth of ZIF‐7 microrods together with the chemical function of the crystal growth modulator (diethylamine) are revealed at all relevant length scales, from the atomic to the full crystal size. X‐ray marks the spot: In situ time‐resolved small‐ and wide‐angle X‐ray scattering and quick‐scanning extended X‐ray absorption spectroscopy was used to study the crystallization of the metal–organic framework ZIF‐7. These studies along with density functional theory calculation show that the self‐assembly mechanism is rather complex (see figure).