Novel Supramolecular Frameworks Self‐Assembled from One‐Dimensional Polymeric Coordination Chains

The novel supramolecular frameworks [Cd(BDC)(phen)(H2O)]n (2) and [Cd2(HBTC)2(phen)2]2n·nCd(HBTC)(phen)2 (3) have been synthesized by reaction of the metal source Cd(phen)2(NO3)2 (1) with benzene-1,4-dicarboxylic acid (H2BDC) and benzene-1,3,5-tricarboxylic acid (H3BTC), respectively in a mixed solution of DMF/C2H5OH/H2O. The three-dimensional supramolecular structure of 2 is constructed through hydrogen-bond and aromatic π−π interactions between adjacent metal-organic polymeric coordination chains. Conversely, interestingly, the supramolecular architecture 3 is formed by extending 1-D metal-organic polymeric coordination chains into a 3-D framework by hydrogen-bond interactions between polymeric coordination chains and metal-organic coordination complexes instead of by interchain hydrogen-bond interactions. Additionally, these three compounds exhibit strong fluorescence at room temperature in the solid state. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)