Mild, fast and solvent-driven room-temperature synthesis of lamellar Zn2(bim)4

A rapid, additive-free, and environmentally friendly synthesis of the two-dimensional metal–organic framework Zn 2 (bim) 4 (ZIF-7-III) is achieved in a variety of green solvents. The reaction proceeds rapidly within 10 min at room temperature, eliminating the need for additives, elevated temperatures, or toxic solvents. Lamellar Zn 2 (bim) 4 was obtained in water, ethanol, n-propanol, i-propanol, butanol, acetone and selected solvent mixtures. The produced metal–organic framework was characterized by powder X-ray diffraction, Raman spectroscopy, thermogravimetric analysis, and scanning electron microscopy. The results reveal a pronounced solvent-dependent influence on both product yield and particle morphology. Water affords the highest yield (55%) and spherical particles, whereas alcohols and acetone favor the formation of plate- to disc-like morphologies. Notably, the synthesis and all subsequent washing steps were performed using non-toxic solvents, aligning the process with green chemistry principles. This work establishes a fast, energy-efficient, and sustainable route for producing lamellar Zn 2 (bim) 4 , highlighting solvent choice as a key parameter for controlling material properties for various applications.