Two amino-functional copper metal organic frameworks of formula [Cu-3(ATTCA)(2)(H2O)(3)]center dot 2DMF center dot 11H(2)O center dot 12EtOH (1) (H(3)ATTCA = 2-amino-[1,1:3,1-terphenyl]-4,4,5-tricarboxylic acid, pyz = pyrazine, DMF = dimethylformamide) and [Cu-3(ATTCA)(2)(pyz)(H2O)]center dot 2DMF center dot 12H(2)O center dot 8EtOH (2) were synthesized under solvothermal conditions and characterized by single crystal X-ray diffraction, infrared spectroscopy, elemental analyses, thermogravimetric analyses, and powder X-ray diffraction. Single-crystal X-ray diffraction analysis revealed that both complexes 1 and 2 are built of the Cu-2(COO)(4) paddlewheel secondary building units with an fmj topology. Importantly, complex 1 can be transformed into complex 2 by the single-crystal to single-crystal transformation of which the coordinated water molecules are replaced with pyz molecules. However, the adsorption abilities of 2 are obviously lower than those of 1, as its pores are partially blocked by pyz molecules. Moreover, gas-adsorption analysis showed that the amino-functional 1 possesses higher gas-adsorption capacity than UMCM-151 for N-2, H-2, CH4, and C2H2, especially for CO2.