Fig. 4. ZIF nanocrystal syntheses with varying relative ratios of metal, linker, modulator, and solvent. Synthetic variables are in bold. (Hmim: 1-methylimidazole, Hdcim: 4,5-dichloroimidazole). (A) Dilution results in a series of ZIF-8 nanocrystals sizes.60 (B) Excess linker exerts a stronger influence than base on nanocrystal sizes.37 (C) Addition of n-butylamine rather than linker excess exhibits biggest impact on ZIF-71 sizes.41.