A new 3D porous metal–organic framework (MOF), Cd(CTC)(HPDA)·(H 2 O) (1) (CTC=cis,cis-1,3,5-cyclohexanetricarboxylate and PDA=1,3-propanediamine) has been synthesized by using an organic amine, PDA, as a template. X-ray crystallography reveals that two cadmium centers are coordinated by six different carboxylate groups to construct a dinuclear octahedral secondary building unit (SBU), and these octahedral SBUs are further interconnected by the cyclohexane rings of CTC to generate a 3D network with quadrangular channel dimensions of ca. 10×17Å 2 . In this structure, the dinuclear octahedral SBU can be defined as a 6-connected node, and CTC ligating with three SBUs can act as a 3-connected node. So the resulting structure of 1 is a binodal (3,6)-connected net with rutile topology. Additionally, polymer 1 exhibits intense fluorescence at 364nm with the excitation peak at 240nm in the solid state at room temperature.