3d-4f Heterometal-Organic Frameworks for Efficient Capture and Conversion of CO2

Two novel three-dimensional 3d-4f heterometallic-organic frameworks {[TbZn(BPDC)(2)(mu(2)-H2O)Cl(H2O)(3)]center dot 5H(2)O center dot 0.5DMA}(n) (1) and {[TbCo(BPDC)(2)(mu(2)-H2O)Cl(H2O)(3)]center dot 8H(2)O center dot 0.5DMA}(n) (2) have been synthesized and structurally characterized. They are isostructural and exhibit irregular one-dimensional channels with a large potential pore volume. Importantly, both of them demonstrate excellent catalytic activity for the chemical fixation of CO2 into cyclic carbonates under mild conditions. Moreover, the catalytic recycling of compound 1 as a representative example was explored; it can be easily separated and reused for at least four times without significant reduction in catalytic ability.