| 초록 |
Metal Organic Frameworks (MOFs) are prominent materials due to their porous nature, richness in metal/inherent functional groups, their synthetic or post-synthetic customizability etc. MOFs are excellent materials for various applications including CO2 capture. Post-capture transformation of CO2 to useful products is attractive from the standpoint of its abundance and non-toxicity in comparison to the commonly used C1 feedstock like phosgene or CO. Synthesis of five membered cyclic carbonates from CO2 and epoxide is 100% atom economical and an ideal representative for its transformation (Scheme 1). Excitingly, MOFs are being reported as catalysts for this process. Bio-MOFs (for example, amino acid based AA-MOFs) are attractive catalysts, owing to their richness in acid-base sites. We report a 3D-Bio-MOF CuAspBpy (constituted of Cu, L-Aspartic acid and 4,4’-dipyridyl) that can capture CO2 and also act as a catalyst for propylene carbonate (PC) synthesis from propylene oxide (PO) and CO2. The effect of various reaction parameters such as the catalyst loading, temperature, CO2 pressure, and time were evaluated. A plausible reaction mechanism was also proposed. The process presented herein represents a catalyst that is derived from natural constituents of low cost, and which is an efficient route for chemical fixation of CO2 into high-value chemicals. |
