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Spectroscopic and structural characterization of the charge-transfer interaction of N,N `-bis-alkyl derivatives of 1,4,6,8-naphthalenediimide with chloranilic and picric acids
Faculty
Science
Year:
2008
Type of Publication:
Article
Pages:
907-915
Authors:
Refat, Moamen S, Grabchev, Ivo, Ahmed, Hamdy A, El-Zayat, Lamia A
DOI:
10.1016/j.saa.2007.10.007
Journal:
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY PERGAMON-ELSEVIER SCIENCE LTD
Volume:
70
Research Area:
Spectroscopy
ISSN
ISI:000258363300030
Keywords :
1, 4, 6, 8-naphthalenediimide, CT complexes, chloranilic acid, piciric acid
Abstract:
Charge-transfer (CT) complexes formed from the reactions of two N,N'-bis-alkyl derivatives of 1,4,6,8-naphthalenediimide such as N,N'-bis{[}2-hydroxyethyl)1-1,4,6,8-naphthalenediimide (BHENDI) and N,N'-bis-{[}2-N,N-dimethylaminoethyl)]-1,4,6,8-naphthalenediimide (BDMAENDI) with chloranilic acid (CLA) and piciric acid (PA) as pi-acceptors, have been studied spectrophotometrically in methanol and chloroform, respectively at 25 degrees C. The photometric titration curves for the reactions indicated that the data obtained refer to 1:1 charge-transfer complexes of {[}(BHENDI)(CLA)], {[}(BDMAENDI)(CLA)], {[}(BHENDI)(PA)] and {[}(BDMAENDI)(PA)] were formed. Benesi-Hildebrand and its modification methods were applied to the determination of association constant (K), molar extinction coefficient (epsilon). The solid CT complexes have been synthesized and characterization by different spectral methods. (C) 2007 Elsevier B.V. All rights reserved.
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