Structures and luminescent properties of Sm(III) and Dy(III) coordination polymers with 2,4,6-pyridinetricarboxylic acid

Abstract Two rare earth coordination compounds with 2,4,6-pyridinetricarboxylic acid (H3pta) have been synthesized by the hydrothermal method; the formula is {[RE(pta)(H2O)3] · H2O} n [RE = Sm (1) and Dy (2)]. Complexes 1 and 2 are crystallized in the monoclinic crystal system with P21/c space group. X-ray structure analyses show the two complexes have the same structure. Each pta3− connects three rare earth ions. Both the Sm(III) and Dy(III) complexes exhibit characteristic luminescence in the visible region upon excitation with UV-rays. Keywords: 2,4,6-Pyridinetricarboxylic acidPhotoluminescenceSamariumDysprosiumLanthanide Acknowledgments This work was supported by Education Department of Henan Province (2009B150026).