ZIF-8 is a widely studied metal-organic framework, but questions remain about its crystallization mechanism, especially at the initial stages. In this study, we used in-situ nonlinear optical (NLO) light scattering techniques to probe nucleation and crystal growth of ZIF-8 nanocrystals. The NLO measurements provided unique insights into the crystallization mechanism of ZIF-8. The formation of crystalline ZIF-8 nanoparticles was probed through depolarization measurements. By comparing second and third harmonic scattering the formation of defects was revealed in the earliest stages. These measurements highlight the potential of NLO techniques to probe nucleation and crystal growth in situ, providing information missed by traditional X ray based techniques.
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