Synthesis, Characterization, and Crystal Structure of Two Coordination Polymer Material with Rigid Tetracarboxylate and Chelating N-Donor Coligand

Abstract

Two new metal-organic frameworks, [Mn(aobtc))_0.5 (phen)₂·2H₂O·H₂hb] (1) and [Cu(phen)₂Cl·H₃DDA·H₂O·HAC] (2) (H₄aobtc = azoxybenzene-3,3′,4,4′-tetracarboxylic acid, H₄DDA = 4,4′-diazenediyldiphthalic acid, H₂hb = p-hydroxybenzoic acid and phen = 1,10-phenanthroline), have been synthesized and characterized by IR and single-crystal X-ray diffraction. Complex 1 exhibits interesting 1D chain structure containing dinuclear Mn subunits, which is further extended into 3D supramolecular double chain via π–π interactions and hydrogen-bonding interactions. Compound 2 has a monomer with [Mn(phen)₂Cl]⁺ unit. The structural analysis reveals that the assistant ligand has critical effect on the construction of the complexes.

Keywords:

• coordination polymer
• crystal structure
• supramolecular interaction

Acknowledgments

The authors acknowledge financial assistance from Sichuan University of Science and Engineering, the Institute of Functionalized Materials (grant Nos. 2009xjkpL003 2010XJKYL005, and 2011KY02), the Education Committee of Sichuan Province (No. 09ZA057), and the Committee of Science and Technology of Sichuan Province (No. 2010GZ0130).