A two-dimensional Cu IIGd III compound self-assembled by H-bonding and intermolecular weak coordinate bonding between the dinuclear cores: structure and magnetic properties

Abstract

A heteronuclear Cu IIGd III complex [Cu IILGd III(NO 3) 3] with the hexadentate Shiff-base compartmental ligand N,N ′-ethylenebis(3-ethoxysalicylaldiimine) (H 2L) has been synthesized and structurally characterized. The intermolecular semicoordination of nitrate oxygen to copper(II) results a one-dimensional zigzag chain, which are linked by H-bonding to form a two-dimensional sheet. Magnetic studies reveal ferromagnetic interaction within the dinuclear core and antiferromagnetic interaction propagated through the extended network ( J=4.04 cm −1, zJ ′=−0.027 cm −1, g Cu =2.109, g Gd =2.001 , where H=−2 J S Cu· S Gd+ β( g Cu· S Cu+ g Gd· S Gd) H− zJ ′〈 S 4 Z 〉 S 4 Z ).