Hydrothermal Synthesis, Crystal Structures, and Properties of a Class of 2D Coordination Polymers

Hydrothermal reactions between 2,6‐naphthalenedicarboxylic acid (H2NDC), 1,10‐phenanthroline (1,10‐phen) or 2,2′‐bipyridine (2,2′‐bpy), and transition metal acetates give rise to four coordination polymers, namely [Cu3(NDC)3(2,2′‐bpy)(H2O)2]n·nH2O (1), [Cu(NDC)(1,10‐phen)]n (2), [Zn(NDC)(1,10‐phen)]n (3), and [Zn4(OH)2(NDC)3(2,2′‐bpy)2]n (4), which show different two‐dimensional layered architectures. Compound 1 consists of three kinds of polymeric chains that are interconnected to form an unusual two‐dimensional layered motif, while compound 4 features a two‐dimensional honeycomb network structure with a noninterpenetrating ABCDABCD packing pattern. Compounds 2 and 3 show a two‐dimensional grid‐type framework but have different space‐filling styles. The magnetic properties for 1 and 2 and the solid‐state emission spectra of 3 and 4 have also been studied. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)