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Exceptionally Robust In-Based Metal–Organic Framework for Highly Efficient Carbon Dioxide Capture and Conversion

Research paper by Lin Liu, Shi-Ming Wang, Zheng-Bo Han, Meili Ding, Da-Qiang Yuan, Hai-Long Jiang

Indexed on: 18 Mar '16Published on: 14 Mar '16Published in: Inorganic Chemistry



Abstract

An exceptionally robust In-based metal−organic framework features selective sorption of carbon dioxide (CO2) over dinitrogen. It could be a catalyst with high activity for chemical fixation of CO2 coupling with epoxides into cyclic carbonates under mild conditions.An In-based metal–organic framework, with 1D nanotubular open channels, In2(OH)(btc)(Hbtc)0.4(L)0.6·3H2O (1), has been synthesized via an in situ ligand reaction, in which 1,2,4-H3btc is partially transformed into the L ligand. Compound 1 exhibits exceptional thermal and chemical stability, especially in water or acidic media. The activated 1 presents highly selective sorption of carbon dioxide (CO2) over dinitrogen. Interestingly, diffuse-reflectance infrared Fourier transform spectroscopy with a carbon monoxide probe molecule demonstrates that both Lewis and Brønsted acid sites are involved in compound 1. As a result, as a heterogeneous Lewis and Brønsted acid bifunctional catalyst, 1 possesses excellent activity and recyclability for chemical fixation of CO2 coupling with epoxides into cyclic carbonates under mild conditions. In addition, the mechanism for the CO2 cycloaddition reaction has also been discussed.

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