Please use this identifier to cite or link to this item:
Title: Synthesis, structure, magnetic properties and aqueous solution characterization of p-hydroquinone and phenol iminodiacetate copper(ii) complexes
Authors: Stylianou, Marios 
Viskadourakis, Zacharias A. 
Drouza, Chryssoula 
Giapintzakis, John 
Keramidas, Anastasios D. 
Major Field of Science: Agricultural Sciences
Field Category: AGRICULTURAL SCIENCES;Agricultural Biotechnology;Other Agricultural Sciences
Keywords: Antiferromagnetism;Copper;Copper compounds;Electrolysis;Infrared spectroscopy;Ions;Ketones;Magnetic materials;Metal ions;Oxygen
Issue Date: 2008
Source: Dalton Transactions, 2008, iss. 44, pp. 6188-6204
Issue: 44
Start page: 6188
End page: 6204
Journal: Dalton Transactions 
Abstract: The reaction of Cu2+ acetate monohydrate with 2-[N,N′-bis(carboxymethyl)aminomethyl]-4-carboxyphenol (H 4cacp), 2-[N,N-bis(carboxymethyl)aminomethyl]hydroquinone (H 4cah) and the dinucleating 2,5-bis[N,N-bis(carboxymethyl)aminomethyl] hydroquinone (H6bicah) in water results in the formation of several Cu2+ species, which are in dynamic equilibrium in aqueous solution and their stability is pH dependent. A systematic crystallographic study of these species was pursued, resulting in the characterization of most of the species. Additional techniques were employed to characterize the molecules in the solid state (infrared spectroscopy) and in solution (UV-vis spectroscopy and electrochemistry). These measurements show that the Cu2+ ions are ligated mainly to the iminodiacetate at pH < 6, exhibiting only weak interactions with the phenol oxygen. At pH > 6, the phenol oxygen was deprotonated and dinuclear-bridged species, from the phenolate oxygen complexes exhibiting a Cu2+2O2 core, were isolated. The coordination environment around the copper ions varies between trigonal bipyramidal, tetragonal pyramidal and distorted octahedral geometries. The two unpaired electrons of the Cu2+ ions are found to be antiferromagnetically coupled. A survey of the magnetic and structural properties of the dinuclear phenoxide bridged Cu2+ complexes shows that the strength of the antiferromagnetic coupling is linearly dependent on the Cu-Ophenolate bond lengths, at bond distances below 1.98 . The effect of the Cu-O-Cu angles on the magnetic properties of the complexes is also discussed
ISSN: 1477-9226
DOI: 10.1039/B803854F
Rights: © The Royal Society of Chemistry
Type: Article
Affiliation : University of Cyprus 
Cyprus University of Technology 
University of Crete 
Appears in Collections:Άρθρα/Articles

CORE Recommender
Show full item record

Citations 50

checked on Mar 21, 2021


Last Week
Last month
checked on Apr 17, 2021

Page view(s) 50

Last Week
Last month
checked on Aug 1, 2021

Google ScholarTM



Items in KTISIS are protected by copyright, with all rights reserved, unless otherwise indicated.