Synthesis, Crystal Structure and Properties of a New Lanthanide Pyridine-2,4,6-tricarboxylato Coordination Polymer

Abstract

A new lanthanide pyridine-2,4,6-tricarboxylato coordination polymer, [Dy 2 (H 2 O) 5 (ptc) 2 ]·H 2 O (H 3 ptc = pyridine-2,4,6-tricarboxylic acid), was hydrothermally synthesized. The complex exhibits both mono-capped square antiprismatic DyNO 8 chromophores and 4,4ʹ-bicapped trigonal prismatic DyNO 7 chromophores, which are interconnected through ptc 3− anions in μ 3 η 6 and μ 4 η 6 coordination modes to achieve a new 3D MOF of an unprecedented topology of (4 · 6 3 · 8 2 )(6 3 ) type. This Dy(III) complex exhibits a characteristic luminescence in the visible region upon excitation at 300 nm. The temperature-dependent magnetic properties of the Dy(III) complex were investigated in the temperature range of 2 - 300 K.