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Chelating surfactants

self-organization and complex formation

Lindblad, Cecilia (2003). Chelating surfactants. Diss. (sammanfattning/summary) Uppsala : Sveriges lantbruksuniv., Acta Universitatis agriculturae Sueciae. Agraria, 1401-6249 ; 382
ISBN 91-576-6424-2
[Doctoral thesis]

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Abstract

The thesis summarizes and discusses results of studies regarding self-organization and complex formation of model chelating surfactants. In the study of self-organization in aqueous systems of the chelating surfactants, alkyl-N-iminodiacetic acids, the acidic constants are determined and the influence of the alkyl chain length is discussed. The crystal structures of alkyl-N-iminodiacetic acids are determined by single crystal X-ray diffraction. A short and strong hydrogen bond is identified in the structure, the oxygen-oxygen bond distance d(O(-H)...O)=2.455-2.480 Å, and the oxygen-hydrogen distance d(O-oxygen bond distance d(O-H) stretching frequency v(O-H)≈720 cm⁻¹ in methyl-N-iminodiacetic acid. The implications of the short and strong hydrogen bond in the solid state when dissolved in water, as a function of degree of aggregation, in aqueous systems are discussed. The properties of complex formation between alkyl-N-iminodiacetic acids and a selection of hard or borderline metal ions are studied, calcium(II), chromium(III), iron(III), and zinc(II). The binding properties of the amine nitrogen atom in the chelating surfactant complexes are studied in solid state and aqueous systems by extended X-ray absorption spectroscopy, EXAFS. Calcium(II) and chromium(III) ions form octahedral complexes to oxygen atoms. Iron(III) ions form octahedral complexes, in solid as oxo-bridged dimers and in aqueous solution with four bond to oxygen and two bonds to nitrogen atoms. Zinc(II) ions are generally four-coordinated to oxygen atoms in the solid state, in aqueous solution and depending on pH bonding further nitrogen atoms at longer distances, up to a six-coordination.

Authors/Creators:Lindblad, Cecilia
Title:Chelating surfactants
Subtitle:self-organization and complex formation
Year of publishing :December 2003
Volume:382
Number of Pages:66
Papers/manuscripts:
NumberReferences
ALLI. Häggman, L., Lindblad, C., Oskarsson, H., Ullström, A.-S., Persson, I.m, The Influence of Short Strong Hydrogen Bonding and the Physicochemical Properties of Alkyl-N-iminodiacetic Acids in Solid State and Aqueous Systems, Journal of American Chemical Society, 2003, 125,12,3631-3641. II. Lindblad, C., Persson, I., Complex Formation Between Alkyl-N-iminodiacetic Acids and Hard Metal Ions in Aqueous Solution and Solid State, manuscript. III. Häggman, L., Lindblad, C., Persson, I., Complex Formation Between Zinc(II) and Alkyl-N-iminodiacetic Acids in Aqueous Solution and Solid State, manuscript.
Place of Publication:Uppsala
ISBN for printed version:91-576-6424-2
ISSN:1401-6249
Language:English
Publication Type:Doctoral thesis
Full Text Status:Public
Agris subject categories.:X Agricola extesions > X50 Chemistry
Subjects:Not in use, please see Agris categories
Agrovoc terms:surfactants
Keywords:hydrogen bond, chelating surfactant, calcium(II), chromium(III), iron(III), zinc(II), structure, EXAFS, X-ray diffraction, IR
URN:NBN:urn:nbn:se:slu:epsilon-172
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-172
ID Code:433
Department:(NL, NJ) > Dept. of Chemistry (until 131231)
Deposited By: Staff Epsilon
Deposited On:19 Jan 2004 00:00
Metadata Last Modified:02 Dec 2014 10:04

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