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

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)]center dot 10DMF [NH2-H(2)bpdc = 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.