Two unique self-penetrating metal-organic frameworks based on flexible tripodal ligands, Cu(II) and N-containing bridging ligands

Solvothermal reaction of Cu(OAc)(2)center dot H2O, tri(2-carboxyethyl)isocyanurate (H(3)tci) and 4,4'-bipyridine (bpy) or 1,3-bis(4-pyridyl) propane (bpp) leads to the generation of two novel metal-organic frameworks, [Cu(Htci)(bpy)]center dot 0.5H(2)O (1) and [Cu-3(tci)(2)(bpp)(2)(H2O)]center dot 3H(2)O (2). 1 features a 3D self-penetrating framework which results from two-fold interpenetrating 4-connected CdSO4 nets linked by carboxylate oxygen atoms of tci ligands. 2 is a 3D self-penetrating 3,4,6-connected 3-nodal net with the stoichiometry (3-c)(2)(4-c)(6-c) constructed by a two-fold interpenetrating (4.10(2))(2)(4(2).10(4)) net connected by bpp ligands.