Synthesis, structural determination and spectroscopic analysis of a novel 2D terbium coordination network with ethyleneglycol-bis-(2-aminoethylether)-N,N,N′,N′-tetraacetic acid

Abstract A novel two-dimensional (2D) mononuclear complex, namely, (enH 2 )[Tb III (egta)(H 2 O)] 2 ·6H 2 O (H 4 egta = ethyleneglycol-bis-(2-aminoethylether)- N , N , N ′, N ′-tetraacetic acid and en = ethylenediamine), was successfully synthesized and characterized by infrared spectrum, UV–vis spectrum, fluorescence spectrum, thermal analysis and single-crystal X-ray diffraction techniques. Single-crystal X-ray diffraction analysis reveals that the central Tb(III) ion is nine-coordinate in geometry of pseudo-monocapped square antiprismatic polyhedron. Furthermore, the hydrogen bonds play an important role in the fabrication of layer structure of the complex. Through hydrogen bonds between ethylenediamine cation (enH 2 2+ ) and [Tb III (egta)(H 2 O)] – complex anion, the title complex forms a 2D layer network along [1 1 1] crystallographic direction. Particularly, the fluorescent property is also fully investigated, which indicates that the title complex would be a potential candidate as fluorescent materials.