A new porous and hydrothermally stable three-dimensional (3D) coordination polymer {[Cd(bpydb)]A·6H₂O}_n (1) has been synthesized under solvothermal condition from a new rigid ligand 4,4′-(4,4′-bipyridine-2,6-diyl) dibenzoic acid (H₂bpydb) and Cd(NO₃)₂A·6H₂O. Single crystal X-ray analysis shows that 1 has a 5-connected 4⁴6⁶ vma net with one-dimensional (1D) hexagonal channels filled with water molecules. Integrity of the framework is maintained upon removal of the water molecules by heating to result in a porous framework. Low pressure N₂ and high pressure H₂ and CH₄ sorption studies along with water adsorption studies were performed on this framework.