Three 2D Ln‐Sulfoterephthalate Complexes with 4,4′‐Bisbiphenyl‐imidazole Featuring Helical Chains

A series of Ln‐sulfoterephthalate coordiantion polymers, namely, [Ln(2‐stp)(4,4′‐bbpi) (H 2 O) 2 ] · H 2 O [Ln = Eu ( 1 ), Tb ( 2 ), Dy ( 3 )] (2‐H 3 stp = 2‐sulfoterephthalate; 4,4′‐bbpi = 4,4′‐bisbiphenyl‐imidazole), were prepared by hydrothermal method and characterizatied by EA, IR, TGA, and PXRD technologies. Single crystal X‐ray diffraction analyses show that the three complexes are isostructral two‐dimensional network featuring helical chain structures. The fluorescence studies show that the emissions of the coordination polymers exhibit the characteristic peaks of lanthanide ions, which means they could be potential fluorescence materials.