A novel heteronuclear metal organic frameworks(MOF)incorporating both transition and alkali metal ions,namely,{(Ni2K2L2·bipy]?6H2O]?2H2O}n(1)(L=N-phosphonomethyl amino diacetic acid,bipy=4,4′-dipyridine)was obtained.Its structure was established by single crystal X-ray diffraction analysis and further characterized by elemental analysis,IR spectroscopy.The complex crystallizes in the orthorhombic system,with Pccn space group.The cell parameters of this compound are: a = 14.650(11),b = 36.56(3),c = 7.112(5)? and V = 3809.3(8)?3.In this framework,bipy connects adjacent Ni–K heteronuclear coordination units into one dimensional(1D)railway type chain array.The carboxylic oxygen from N–phosphonomethyl amino diacetic acid further propagated these chains into 2D deck like array bearing the large tunnel.The molar electrical conductivity of heteronuclear complex increases gradually with temperature augment.The complex 1 also exhibits strong photoluminescent emission in visible region.