Synthesis, crystal structure and magnetism of a one-dimensional Cu(II) coordination polymer with monodeprotonated 2,2'-bypyridine-3,3'-diol as bridging ligand

摘要

A new one-dimensional copper(II) coordination polymer, [Cu(mu-HL)(H_2O)_2(NO_3)]_n (HL = monodeprotonated 2,2'-bypyridine-3,3'-diol), was synthesized and its crystal structure determined by X-ray crystallography. In the crystal Cu(II) is located a distorted octahedral coordination geometry and each HL coordinates two Cu(II) ions with its two N atoms and an O atom of deprotonated hydroxyl, giving a one-dimensional chain. The variable-temperature (2-300 K.) magnetic measurements, analyzed using a one-dimensional Cu(II) magnetic interaction formula, indicate the existence of very weak ferromagnetic coupling with 2J = 0.014 cm~(-1).