In this paper, two novel metal-organic frameworks [ Cu( bna1)( DMF)] n center dot nH(2)O center dot nCH(3)OH ( complex 1) (H 2 bna1 = 2,2 ' - dihydroxy- 1,1 ' - dinaphthyl- 6,6 ' - dicarboxy acid) and [Co( bna2)(2)(bpy)(H2O)2] n ( complex 2) (H(2)bna2 = 2,2 ' - dihydroxy- 1,1 ' - Dinaphthyl- 4,4 ' dicar- boxyacid) have been synthesized under mild conditions and carefully characterized. Crystal structural analysis reveals that complex 1 adopts a 1D infinite chain structure, which forms 2D sheet by pi- pi weak interactions. Complex 2 possesses 2D sheet structure, where Cobalt ions are recognized as the nodes. So it generated a regular two- dimensional grid with the size of 1.57 x 1.15 nm. Complex 2 assembles into a 3D supramolecular network connected by the hydrogen bonds. IR spectra studies indicate that the coordination mode of carboxyl group of complex 1 and complex 2 are chelating with the metal ions. X- ray powder diffraction ( PXRD) studies of both complexes confirm that there is no impurity phase in both complexes since their diffraction patterns match well with the simulated ones.