Abstract
Two porous cobal–organic frameworks showing threefold interpenetration of pillared-layer structures, constructed from two-dimensional (2D) neutral metal–carboxylate layers and neutral bis-pyridyl-bis-amide pillars, were hydro(solvo)thermally synthesized and structurally characterized by single-crystal X-ray diffraction. Compound {[Co2(thdc)2(bpda)2(DMF)]·2DMF}n (1, thdc = 2,5-thiophenedicarboxylate; bpda = N,N′-bis(4-pyridinyl)-1,4-benzenedicarboxamide) adopts a uninodal 6-connected three-dimensional (3D) framework with a {412·63}-pcu topology in which 2D rhomboid-like 44-sql Co–thdc layers are pillared by bpda ligands. While compound {[Co3(btc)2(bpda)3]·2DMF·9H2O}n (2, btc = 1,3,5-benzenetricarboxylate) is composed of a binodal (3,4)-connected 3D framework with a (63)2(64·8·10)3 topology that can be described in terms of two building subunits—a 2D porous honeycomb-like 63-hcb Co–btc layer and a bpda pillar. An in-depth analysis showed that the mesh size of the metal–carboxylate layer, in addition to the ...
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