Synthesis, structure and near-infrared luminescence of a new 2D praseodymium(III) coordination polymer

Abstract

A novel coordination polymer, [Pr 2(BIPA) 3(H 2O) 2]·2H 2O ( 1) (H 2BIPA=5-bromoisophthalic acid), was prepared by hydrothermal synthesis and characterized by IR spectroscopy, elemental analysis and single-crystal X-ray diffraction. The crystal was of monoclinic system, space group C2/ c, with a=1.98037(14), b=1.44189(14), c=2.15281(18) nm, β=95.220(2)°, V=6.1218(9) nm 3, C 24H 17Br 3O 16Pr 2, M r=1082.93, D c= 2.350 g/cm 3, F(000)=4096, μ=7.136 mm −1 and Z=8. The final R 1=0.0608 and wR 2=0.1371 for 5624 observed reflections ( I>2 σ( I)). Complex 1 featured an interesting 2D layer containing {Pr 2(CO 2) 3} n right-handed and left-handed helical chains. Furthermore, hydrogen bonds linked the adjacent 2D layers to form a 3D supramolecular framework. Moreover, the near-infrared luminescent properties of 1 were also investigated in the solid state.