Hydroxyl-directed dinitration of carboxylate ligands mediated by lead and nickel nitrates and preparation of Pb/Ni heterometallic complexes under hydrothermal conditions

摘要

The hydrothermal reaction of 5-hydroxyisophthalic acid (H3L) and lead and nickel nitrates produced a heterometallic polymer [Pb6Ni(mu(3)-OH)(8)(La)(2)](n) containing heptanuclear [Pb6Ni(mu(3)-OH)(8)](6+) units and a homometallic complex {[Pb(Lb)(H2O)]center dot(H2O)(0.25)}(n) consisting of one-dimensional lead-oxide chains: evidently, the L-a and L-b ligands resulted from in situ hydroxyl-directed dinitration of L ligand during the hydrothermal reaction.