Polyrotaxane-like and Interpenetrating Metal−Organic Frameworks (MOFs) Constructed from Biphenyl-4,4′-Dicarboxylate and Bis(imidazole) Ligand

Abstract

The paper presents three interesting entanglement systems, including two polyrotaxane-like and one interpenetrating frameworks, namely, [Co(L¹)(bpdc)] (<b>1</b>), [Co(L²)(bpdc)] (<b>2</b>), and [Co(L³)1.5(bpdc)(H₂O)]·(L³) (<b>3</b>), constructed from biphenyl-4,4′-dicarboxylate and bis(imidazole) ligands (L¹ = 1,6-bis(imidazol-1-yl)-hexane, and rods that are interlaced in a parallel fashion to result in 2D → 2D polyrotaxane-like motifs (L² = 1,4-bis(imidazol-1-ylmethyl)benzene and L³ = 1,4-bis(1-imidazolyl)-benzene)). Both compounds <b>1</b> and <b>2</b> contain loops. Compound <b>3</b> represents the first example of a triply interpenetrated 5-connected 4⁴6⁶ topology network.