Synthesis, crystal structures and luminescence properties of two novel 3D heterometallic coordination polymers

Two heterometallic coordination polymers, {KBa(ptc)(H2O)2}n(1) and {KCaEr(ptc)2(H2O)}n(2) (H3ptc = pyridine-2,4,6-tricarboxylic acid) have been synthesized under hydrothermal conditions and characterized by elemental analysis, IR and single crystal X-ray diffraction. 1 and 2 exhibit two novel three-dimensional (3D) frameworks, and the luminescence properties of 1, 2 were investigated.

By using the pyridine-2,4,6-tricarboxylic acid ligand under hydrothermal strategy, two heterometallic coordination polymers {KBa(ptc)(H2O)2}n (1) and {KCaEr(ptc)2(H2O)}n (2) were successfully synthesized, which obtained three kinds of coordinated modes of the ligand. Furthermore, both 1 and 2 show favorable luminescence properties at room temperature.Figure optionsDownload as PowerPoint slideResearch highlights
► Two new HMCPs {KBa(ptc)(H2O)2}n(1) and {KCaEr(ptc)2(H2O)}n(2) have been synthesized by hydrothermally reaction based on the H3ptc (H3ptc=pyridine-2,4,6-tricarboxylic acid).
► Complex 2 is the first example of Er(III)-Ca(II)-K(I) HMCPs based on H3ptc.
► Complexes 1 and 2 show photoluminescence property at room temperature.