Synthesis of a Zinc(II) Coordination Polymer Based on 4 4 Bipyridine by Mechanochemical and Solvothermal Methods
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Metal-organic frameworks (MOFs) have garnered significant attention due to their diverse structures and potential applications in various fields, including gas storage, catalysis, and sensing. This study reports the comparative synthesis of a zinc(II) coordination polymer, [Zn(OAC)2(4,4'-bipy)n], using both mechanochemical and conventional solvothermal methods. The mechanochemical approach involved the solvent-free grinding of zinc acetate and 4,4'-bipyridine, yielding the product rapidly and efficiently. On the other hand, the solvothermal synthesis was conducted under reflux conditions. Both synthetic routes afforded materials with identical chemical compositions and structural characteristics. These were confirmed by comprehensive spectroscopic analyses including Fourier Transform Infrared (FT-IR) spectroscopy, Ultraviolet-Visible (UV-Vis) spectroscopy, and Nuclear Magnetic Resonance (NMR) spectroscopy. Elemental analysis and melting point determinations further supported the identity of the products. Notably, the mechanochemical synthesis demonstrated a higher reaction yield (89 %) compared to the solvothermal method (76 %), highlighting its advantages in terms of efficiency and green chemistry principles. This work contributes to the understanding of alternative synthetic pathways for coordination polymers, emphasizing the potential of mechanochemistry as a sustainable and scalable method for materials synthesis.
