Hydrothermal synthesis, crystal structure and Photoluminescent properties; 3D Holmium(III) coordination polymer

• 3D new Ho(III) complex was synthesized by hydrothermal method.
• Crystal structure of complex 1 has been described.
• The photoluminescence properties of Ho(III) complex in the solid state at room temperature were investigated.

A new coordination polymer, {[Ho(2-stp)2(H2O)2]·2(4,4′-bipy)1/2·5(H2O)}n, 1, (2-stp = 2-sulfoterephthalate anion and 4,4′-bipy = 4,4′-bipyridine) has been synthesized by hydrothermal method and characterized by elemental analysis, IR, single-crystal X-ray diffraction. The Ho(III) atoms are bridged by two 2-stp ligands to form infinite chains which are associated through O–H⋯O interactions to build up 3D network and the free 4,4′-bipyridine molecules occupy the channel of the 3-D network. π–π stacking interactions exist between 4,4′-bipy and 2-stp ligands rings, with the centroid-to-centroid distance of 3.847 Å. Additionally, solid state photoluminescence properties of 1 at room temperature have been investigated. Under the excitation of UV light, the compound 1 exhibited characteristic emissions of Ho(III) ion in the visible and the near-infrared (NIR) regions.

3D new Ho(III) complex has been synthesized using hydrothermal method and characterized by single crystal X-ray diffraction. The photoluminescence properties of Ho(III) complex in solid state were investigated. Under the excitation of UV light, the complex exhibited characteristic emission of Ho(III) ions in the visible and NIR region.Figure optionsDownload as PowerPoint slide