Self-assembly of novel 3d-4d-4f heterometal-organic framework based on double-stranded helical motifs

Three novel heterometal-organic frameworks {[CoCdLn-(HCAM)(2)(CAM)(H2O)(7)]center dot 7H(2)O}(n) (Ln = Dy (1); Eu (2); Sm (3)) have been successfully synthesized under hydrothermal condition using 4-hydroxyl-pyridine-2,6-dicarboxylic acid (H(3)CAM) as ligand, and display a fascinating 3D structure constructed by double-stranded helical motifs and exhibit luminescent properties.