An Amino-Decorated Self-Catenated Metal–Organic Framework for Efficient Capture and Conversion of CO₂

Abstract

Efficient capture and conversion of CO2 are important in energy utilization and environmental protection. A new porous metal–organic framework [Zn4O­(NH2-bpdc)3(bpe)0.5(H2O)]·10DMF [NH2-H2bpdc = 2-amino-biphenyl-4,4′-dicarboxylic acid, bpe = 1,2-bi­(4-pyridyl)­ethylene] has been synthesized based on an amino-tagged organic linker and tetranuclear {Zn4O} SBU. This compound exhibits an unusual self-catenated underlying net of topological type hxg-d-7- R-3c. The framework shows excellent thermal stability for the high connectivity and consists of abundant exposed metal sites and coordination-free amino groups, which make it an efficient heterogeneous catalyst for the cycloaddition of CO2 with epoxides under mild conditions.

Synthesis, Structure, and Heterogeneous Catalysis of a Series of Structurally Diverse Coordination Polymers Based on 5-Nitroisophthalate

“…On the basis of our results and following the related literature, − the catalytic CO 2 cycloaddition reaction mechanism is proposed in Figure . The unsaturated metal centers act as Lewis acid sites and bind electron-rich oxygen atoms of epoxides.…”

Acid-directed synthesis of three Cd-based metal–organic frameworks with luminescence and catalytic CO2transformation properties

“…How to efficiently convert and utilize CO 2 is a hot and difficult issue in the field of energy and chemical industry, and is also a very important part for the resolution of environmental problems and alleviation of the energy crisis. 54,55 Therefore, considering the good stability, porosity and metallic Lewis acid sites, 56–58 CO 2 cycloaddition with epoxides to high value-added cyclic carbonates as an extended application was performed by using 1 and 2 as catalysts.…”

Coordinatively unsaturated 5-nitroisophthalate based cobalt(ii) coordination polymers: efficient catalytic CO2 fixation and Hantzsch condensation

“…Our results and literature reports suggest that the formation of cyclic carbonate products involves a catalytic cycle (Scheme S1 †). [45][46][47][48][49][50][51][52] The nucleophilic oxygen atom of the epoxide binds to the unsaturated acidic metal centres. The nucleophilic bromide ion, freed by TBAB, attacks the polarized epoxide to initiate ring opening.…”