A robust and porous titanium metal-organic framework for gas adsorption, CO 2 capture and conversion.

A robust and porous titanium metal-organic framework (Ti-MOF; LCU-402) has been hydrothermally synthesized through combining a tetranuclear Ti 2 Ca 2 (μ 3 -O) 2 (μ 2 -H 2 O) 1.3 (H 2 O) 4 (O 2 C-) 8 cluster and a tritopic 1,3,5-benzene(tris)benzoic (BTB) ligand. LCU-402 shows remarkable stability and permanent porosity for CO 2 , CH 4 , C 2 H 2 , C 2 H 4 , and C 2 H 6 gas adsorption. Moreover, LCU-402 as a heterogeneous catalyst can smoothly convert CO 2 under a simulated flue atmosphere into organic carbonate molecules by cycloaddition reactions of CO 2 and epoxides, indicating that LCU-402 might be a promising catalyst candidate in practical applications. We are confident that the identification of a persistent titanium-oxo building unit would accelerate the development of new porous Ti-MOF materials.