Synthesis, structure and properties of a hetero-metal organic framework constructed by sulfonate and phenol ligand

A hetero-metal organic framework, [NaSr(HTiron)(H₂O)₅]·H₂O (1) (Na₂H₂Tiron = 4,5-dihydroxy-1,3-benzenedisulfonic acid disodium), has been synthesized under hydrothermal condition. The framework was characterized by elemental analysis, FT-IR spectroscopy, UV–Vis spectroscopy, thermal analysis, and single-crystal X-ray diffraction. It features a 3-D network structure with (4²,12⁴)(4⁵,6⁴,8)₂(4)₂ topology, constructed by HTiron³⁻ ligands. Compared with the ligand, the photoluminescence emission of 1 bathochromically shifts and shows emission maximum at 497 nm at room temperature.