A novel 3D porous metal organic framework, JUC-141, constructed by 5-aminoisophthalic acid and Cu(NO3)(2), has been synthesized successfully. The carboxyl groups in the ligand coordinate to Cu2+ to form the classic Cu-2(COO)(4) paddle wheel SBU, and the assembly of the SBUs with the isophthalic acid moieties leads to a kagome lattice. Interestingly, the amino groups in the ligand also take part in the coordination and link to the dipole of the paddle wheel as pillars, thus forming a 3D porous framework with eea topology. The sizes of the channels are 5.2 angstrom in the direction of [111] and 10.9 angstrom in the direction of [001]. Gas sorption tests show that the CO2 adsorption capacities of JUC-141 are 79.94 and 51.39 cm(3) g(-1) at 273 and 298 K under 1 atm pressure, respectively. However, the N-2 adsorption capacities of JUC-141 are 13.90 and 6.76 cm(3) g(-1) at 273 and 298 K under 1 atm pressure, respectively. LAST calculations indicate that the selectivity values of CO2/N-2 are 21.62 at 273 K and 27.60 at 298 K under 101 kPa, respectively. Good selective adsorption of CO2 over N-2 makes JUC-141 possible for CO2 storage and-separation.