Coordination Polymers ofN,Nʼ-di-(8-Hydroxyquinolinolyl- 5-methyl)-N,N-diethyl-1,3-propane diamine (QEPD)

Asha D Patel,Rignesh S Patel,Ganpat R Patel

doi:10.1155/2010/609494

Abstract

Coordination polymers containing a novel bis(oxine) bidentate ligand, namelyN,Nʼ-di(8-hydroxyquinolinolyl-5-methyl)-N,Nʼ-diethyl-1,3-propane diamine (QEPD) have been prepared with the metal ions Zn(II), Cu(II), Ni(II), Co(II) and Mn(II). The novel bis-(bidentate) ligand was synthesized by condensation of 5-chloromethyl-8-hydroxyquinoline hydrochloride withN,Nʼ-diethyl-1,2- propane diamine in the presence of a base catalyses. All of these coordination polymers and the parent ligand were characterized by elemental analyses, IR spectral and diffuse reflectance spectral studies. The thermal stability and number- average molecular weights (Mn¯) of all of the coordination polymers were determined by thermogravimetric analyses and non-aqueous conductometric titrations, respectively. In addition, all of the coordination polymers have been characterized by their magnetic susceptibilities.

Highlights

The coordination chemistry of bis(oxine), bidentate ligand, has been extensively investigated for their chelating properties[1,2,3]. In this context bis(oxine) ligand with two oxine units joined by a bridge of 5,5’- methylene (-CH2-), 5,5’-sulfonyl (-SO2-), 5,5’-dimethylene sulfide (-CH2-S-CH2-) and -CH-O-CH2- are reported in literature[4,5,6,7,8,9,10]
We have reported the synthesis and characterization of coordination polymers based on the bis-oxine ligand joined with a bridge, -H2C-O-Ph-O-CH2 (Ph = 1,3 phenylene) has been replaced[11]
This work has been further extended with the view of investigation of the chelating ability of a bis-8quinolinol bis(bidentate) ligand by introducing the bridge of N,N’-diethyl-1,3-proapne diamine between two 8-hydroxyquinoline moieties

Summary

Introduction

The coordination chemistry of bis(oxine), bidentate ligand, has been extensively investigated for their chelating properties[1,2,3]. We have reported the synthesis and characterization of coordination polymers based on the bis-oxine ligand joined with a bridge, -H2C-O-Ph-O-CH2 (Ph = 1,3 phenylene) has been replaced[11]. The present work deals with the synthesis and characterization of a bis(oxine) ligand, namely N,N’-di(8-hydroxyquinoloyl5-methyl)-N,N’-diethyl-1,3-propane diamine (QEPD) and its coordination polymers with Zn(II), Cu(II) Ni(II), Co(II) and Mn(II) metal ions. The synthesis of N,N’-di(8-hydroxyquinoloy l-5-methyl)N,N’-diethyl-1,3-propane diamine (QEPD) was carried out in two steps.

Results

Conclusion