Crystal structure of poly[(4,5-imidazoledicarboxylato)lead(II)], [Pb3(C10H2N4O8)]n

Abstract

Source of materialA mixture of Pb(N03)2 (0.5 mmol, 0.165 g), 4,5-imidazoledicaroxylic acid (H3IDC, 0.5 mmol, 0.085 g), 2,2-bipyridine (0.5 mmol, 0.078 g) and H2O ( 18 mL) in a 30 mL Teflon-lined autoclave under autogenous pressure at 423 Κ for five days. After cooling to room temperature, colorless block-like crystals were collected by filtration and washed with distilled water (yield 42 %). DiscussionLead is a toxic metal, so the study of Pb(II) model complexes in biological systems and removal of lead by chelating agents through coordination is very important [1]. Lead(II) possesses a large radius, avariable stereochemical activity, and a flexible coordination environment, which provides unique opportunities for the construction of novel metal-organic frameworks (MOFs) [2]. Imidazole-4,5-dicarboxylic acid is a kind of multidentate N-or O-donor ligand that can be deprotonated to generate Η2ΠΧΖΓ, HIDC 2-, and IDC 3-anions, dependent on the pH level, and hence may result in a large diversity of molecular or supramolecular architectures. However, most of the work has so far focused on the assembly of the d-block [3][4][5]