Synthesis, characterization, thermal study, and crystal structure of a new layered alkaline earth metal sulfonate: Sr[C2H4(SO3)2]

A rare two-dimensional layered inorganic–organic hybrid material, strontium sulfonate Sr[C2H4(SO3)2] was synthesized by hydrothermal reaction of strontium chloride hexahydrate and ethane disulfonic acid at 160 °C. Single-crystal X-ray diffraction was utilized for structural determination. Data showed that the compound, crystallized in the monoclinic system and space group of C2/c. With cell parameters a = 8.3183(7) Å, b = 5.4416(5) Å and c = 14.9784(13) Å. The new material was extensively studied by DRIFT-infrared spectroscopy, thermogravimetric analysis, SEM and powder X-ray diffraction. Results show that the compound is thermally stable.

Graphical abstractA rare two-dimensional layered inorganic–organic hybrid material was obtained by hydrothermal methods. The strontium sulfonate layers are stabilized by –CH2–CH2–groups. The –CH2–CH2– groups are linked to sulfur atoms which in turn bond to the strontium center through bridging oxygen. The structural and thermal properties are discussed.Figure optionsDownload full-size imageDownload as PowerPoint slide