Preparation, spectroscopic and structural studies on charge-transfer complexes of 2,9-dimethyl-1,10-phenanthroline with some electron acceptors

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contributor.author Gaballa, Akmal S. en_US
contributor.author Wagner, Christoph en_US
contributor.author Teleb, Said M. en_US
contributor.author Nour, El-Metwally en_US
contributor.author Elmosallamy, M.A.F. en_US
contributor.author Kaluđerović, Goran N. en_US
contributor.author Schmidt, Harry en_US
contributor.author Steinborn, Dirk en_US
date.accessioned 2010-01-07T07:15:50Z en_US
date.available 2010-01-07T07:15:50Z en_US
date.issued 2007-07-11 en_US
identifier.citation Gaballa, A. S., Wagner, C., Teleb, S. M., Nour, E. M., Elmosallamy, M. a F., Kaluderović, G. N., … Steinborn, D. (2008). Preparation, spectroscopic and structural studies on charge-transfer complexes of 2,9-dimethyl-1,10-phenanthroline with some electron acceptors. Journal of Molecular Structure, 876, 301–307 en_US
identifier.uri http://dx.doi.org/10.1016/j.molstruc.2007.07.003 en_US
identifier.uri http://hdl.handle.net/10576/10617 en_US
description.abstract Charge-transfer (CT) complexes formed in the reactions of 2,9-dimethyl-1,10-phenanthroline (Me2phen) with some acceptors such as chloranil (Chl), picric acid (HPA) and chloranilic acid (H2CA) have been studied in the defined solvent at room temperature. Based on elemental analysis and infrared spectra of the solid CT-complexes along with the photometric titration curves for the reactions, obtained data indicate the formation of 1:1 charge-transfer complexes [(Me2phen)(Chl)] (1), [(Me2phenH)(PA)] (2) and [(Me2phenH)(HCA)] (3), respectively, was proposed. In the three complexes, infrared and 1H NMR spectroscopic data indicate a charge-transfer interaction and as far as complexes 2 and 3 are concerned this interaction is associated with a hydrogen bonding. The formation constants for the complexes (KC) were shown to be dependent upon the nature of the electron acceptors used. The X-ray structure of complex 3 indicate the formation of dimeric units [Me2phenH]2[(HCA)2] in which the two anions (HCA)− are connected by two O–HO hydrogen bonds whereas the cations and anions are joined together by strong three-center (bifurcated) N–HO hydrogen bonds. Furthermore, the cations are arranged in a π–π stacking. en_US
language.iso en en_US
publisher Elsevier en_US
subject Charge transfer en_US
subject 2,9-Dimethyl-1,10-phenanthroline en_US
subject Electron acceptors en_US
subject UV–visible en_US
subject IR en_US
subject 1H NMR en_US
subject X-ray structure analysis en_US
title Preparation, spectroscopic and structural studies on charge-transfer complexes of 2,9-dimethyl-1,10-phenanthroline with some electron acceptors en_US
type Article en_US


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