Coordination Polymers of 1,8-Bis(8-Hydroxyquinolin-5-yl)-2,7-Dioxaoctane

Abstract

Coordination polymers of a novel bis(oxine) bidentate ligand, namely 1,8-bis(8-hydroxyquinolin-5-yl)-2,7-dioxaoctane (BQDO) (H 2 L), have been prepared with the metal ions Cu(II), Co(II), Ni(II), Mn(II), and Zn(II). The novel bis(bidentate) ligand (H 2 L) was synthesized by condensation of 5-chloromethyl-8-hydroxyquinoline hydrochloride with butylene glycol in the presence of a base catalyst. All of these coordination polymers and the parent ligand were characterized by elemental analyses and IR spectral studies. The diffuse reflectance spectral studies of all of the coordination polymers also were performed. The number-average molecular weights (M n ) of all of the coordination polymers were determined by nonaqueous conductometric titrations. In order to determine thermal stability trend, thermogravimetric parameters, such as T o (initial decomposition temperature), T 10 (temperature for 10% weight loss), T max. (temperature of maximum rate of degradation), IPDT (integral procedural decomposition temperature), and the activation energy E a of the thermodegradation process were calculated. All of the coordination polymers were also characterized by their magnetic susceptibilities.