Self-complementary self-assembly of 3D coordination framework involving d-block, s-block metal ions and flexible NTA^3- ligand

The reaction of the flexible ligand nitrilotriacetate with Cu(acac)₂ under hydrothermal condition gave a unique 3D coordination polymer, NaCuNTAH₂O (NTA^3- = the anion of nitrilotriacetate). Na⁺ ion plays an important role in chargeable and structural complementarity in the construction of 3D coordination framework. The unusual coordination mode of NTA ligand has been found for the first time. The complex is an example of coordination polymer containing the d-block, s-block metal ions and NTA^3- ligand generated by an unusual self-complementary self-assembly process.