Three new metal-organicframeworks, [Cu3(L1)2(OH)4]n (1), [Cu(L1)(Cl)]n (2), and [Cu(H2O)(L2)(Cl)]n (3), were synthesized under hydrothermal conditions by reaction of 4-substituted 1,2,4-triazole derivative ligands (L1 = 4-(1,2,4-triazol-4-yl)ethanesulfonate; L2 = 4-(1,2,4-triazol-4-yl)benzenesulfonate) with Cu2+ salts. The different geometry and chemical features of the ligands have yielded unique