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

Hydrothermal reactions between 2,6‐naphthalenedicarboxylic acid (H 2 NDC), 1,10‐phenanthroline (1,10‐phen) or 2,2′‐bipyridine (2,2′‐bpy), and transition metal acetates give rise to four coordination polymers, namely [Cu 3 (NDC) 3 (2,2′‐bpy)(H 2 O) 2 ] n · n H 2 O ( 1 ), [Cu(NDC)(1,10‐phen)] n ( 2 ), [Zn(NDC)(1,10‐phen)] n ( 3 ), and [Zn 4 (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)