Functional group effects on a metal-organic framework catalyst for CO2 cycloaddition

• Published in: Journal of industrial and engineering chemistry (Seoul, Korea) Vol. 64; pp. 478 - 483
• Main Authors: Noh, Jinmi, Kim, Youngik, Park, Hyojin, Lee, Jihyun, Yoon, Minyoung, Park, Myung Hwan, Kim, Youngjo, Kim, Min
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 25.08.2018; 한국공업화학회
• Subjects: CO2 cycloaddition; Coordination polymers; Cyclic carbonate; Metal-organic frameworks; MOF-based catalyst; 화학공학; Coordination polymers; CO2 cycloaddition; Cyclic carbonate; Metal-organic frameworks; MOF-based catalyst
• ISSN: 1226-086X; 1876-794X
• DOI: 10.1016/j.jiec.2018.04.010

[Display omitted] •The organic functional group effects on MOF-catalyzed CO2 cycloaddition have been examined.•Non-functionalized Zr-based MOF, UiO-66 showed the best catalytic activity at 50°C.•The hydroxy-functionalized UiO-66-OH performed cyclic organic carbonate synthesis efficiently at 140°C.•Various epoxides were successfully converted to cyclic organic carbonates, and the Zr-MOF catalyst could be recycled by simple centrifugation. A variety of metal-organic frameworks (MOFs) have been reported as efficient catalysts for CO2 fixation reactions, such as cycloaddition to cyclic carbonates. The permanent porosity of the frameworks and the Lewis acidity of the MOF metal sites have been considered as the major contributors to the catalytic activity in the cycloaddition of CO2. In this study, we have, instead, focused on the effects of the organic functional groups for effective catalytic ability. A total of eight different functionalized Zr-based MOFs were tested. It was revealed that the non-functionalized pristine UiO-66 MOF (UiO=University of Oslo) showed the best conversion at low temperature (77% at 50°C), whereas the hydroxy-functionalized UiO-66-OH MOF displayed the best conversion at high temperature (91% at 140°C). The Zr-MOF could be recycled up to four times without a significant decrease in the reactivity.