Infinite Secondary Building Units and Forbidden Catenation in Metal-Organic Frameworks

Abstract

The metal-org. framework compds. MOF-69A, [Zn3(OH)2(bpdc)2].4DEF.2H2O (bpdc = 4,4'-biphenyldicarboxylate; DEF = N,N-diethylformamide), and MOF-69B, [Zn3(OH)2(ndc)2].4DEF.2H2O (ndc = 2,6-naphthalenedicarboxylate), were prepd. and characterized by x-ray crystallog. Both MOF-69A and MOF-69B have three-dimensional structures constructed from infinite Zn-O-C secondary building units, which provide a framework in which catenation is forbidden. Both compds. contain one-dimensional rhombic channels in which the DEF and water mols. reside as guests. MOF-69A and MOF-69B are stable to exchange of guests in soln., and the process is fully reversible. [on SciFinder (R)]