A 3-D lanthanide–organic framework based on in situ formed benzene-1,2,3,4-tetracarboxylate ligand

One new 3-D open lanthanide–organic framework {[La2(L)1.5(H2O)4]∙2.75H2O}∞ (1) (L = benzene-1,2,3,4-tetracarboxylate) was synthesized and characterized by elemental analyses, IR spectrum, and single-crystal X-ray diffraction, respectively. Notably, 1,2-naphthalenedicarboxylic anhydride can be turned into benzene-1,2,3,4-tetracarboxylate (L) ligand upon an in situ reaction process under hydrothermal conditions. L ligand exhibited two different types of carboxyl coordination modes in 1, and bridged the lanthanum atoms to form a 2-D bilayer and then a 3-D open framework with (4,5,6)-connected (42.84) (32.44.52.62)4(32.45.53.64.7)2 topology. Moreover, luminescent properties of 1 have also been investigated.