A new lanthanide metal-organic framework with (3,6)-connected topology based on novel tricarboxylate ligand

A new 3D lanthanide metal-organic framework with rare flu-3,6-C2/c topology, [Tb(CPEIP)(DMF)(H2O)]·2H2O (1) (DMF = N, N-dimethylformamide), has been synthesized using novel tricarboxylate ligand 5-((4-carboxyphenyl)ethynyl)isophthalic acid (H3CPEIP). It crystallizes in monoclinic space group C2/c. The structure is constructed from metallic 6-connected and organic 3-connected building units with point symbol of (426)2(446287102). The fluorescent properties of compound 1 and organic ligand were studied.