a Laboratory of Coordination Chemistry, Shenyang Institute of Chemical Technology, Shenyang 110142, China
b School of Resource & Civil Engineering, Northeastern University, Shenyang 110004, China
c Department of Inorganic and Physical Chemistry, Ghent University, Ghent 9000, Belgium

[Cd(phen)2(male)(H2O)]•9.5H2O (1) has been synthesized by the reaction of Cd(NO3)2 with phen and male (phen＝1,10-phenanthroline, H2male＝maleic acid) in a mixture solvent of ethanol and distilled water. The complex was characterized by elemental analysis, infrared spectrum and thermal gravimetric analyses. The crystal structure was determined by X-ray single-crystal diffraction. In 1, a novel 1D water chain containing water (H2O)20 cluster was formed. Further hydrogen bonding interaction between the water chain and [Cd(phen)2(male)(H2O)] constructs a unique metal-water 2D framework.