A (3,8)-Connected Metal-Organic Framework with Bending Dicarboxylate Linkers for C 2 H 2 /CO 2 Separation.

Herein, by replacement of the linear terephthalate linker with the bending 2,5-thiophenedicarboxylate (tdc 2- ) linker in the typical (3,9)-connected metal-organic framework, with a reduced 8-connected hydroxyl-centered trinuclear cluster, a new (3,8)-connected network, [Ni 3 (μ 3 -OH)(tdc) 3 (tpp)] [ DZU-1 ; tpp = 2,4,6-tris(4-pyridyl)pyridine], was synthesized. The modified pore environment enables DZU-1 to selectively adsorb C 2 H 2 over CO 2 in an efficient manner.