Self-Penetrating and Interpenetrating 3D Metal−Organic Frameworks Constructed from the Rigid 1,4-Bis(1-imidazolyl)-benzene Ligand and Aromatic Carboxylate

Abstract

This paper presents four interesting entanglement systems, including one self-penetrating and three interpenetrating frameworks, namely, [Ni3(L)3(BTC)2·2H2O]·6H2O (1), [Mn(L)(HBTC)] (2), [Ni2(L)2(BDC)2·2H2O]·H2O (3), and [Mn4(L)4(BDC)4]·H2O (4) (H3BTC = 1,3,5-benzenetricarboxylic acid and H2BDC = 1,4-benzenedicarboxylic acid), based on a rigid 1,4-bis(1-imidazolyl)benzene (L) ligand. Compound 1 is the first example of a (3,4)-connected self-penetrating three-dimensional (3D) polymer containing two types of catenated rings with the unprecedented (6·82)2(62·84)2(64·82) topology. Compound 3 has self-assembled into a 5-fold interpenetrating 3D structure with diamond nets, while both compounds 2 and 4 display 2-fold interpenetrating 3D structures with α-Po structural topology.