NDLI: Interactions between metal cations and the ionophore lasalocid. Part 6.—Potentiometric and electron spin resonance study of the complexation of Gd<sup>3+</sup> in methanol by lasalocid and simpler carboxylic acids

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Journal of the Chemical Society, Faraday Transactions 1 Vol - 85 Issue - 5

Journal of the Chemical Society, Faraday Transactions 1 Vol - 85 Issue - 4

Journal of the Chemical Society, Faraday Transactions 1 Vol - 85 Issue - 3

Journal of the Chemical Society, Faraday Transactions 1 Vol - 85 Issue - 2

Journal of the Chemical Society, Faraday Transactions 1 Vol -79

Journal of the Chemical Society, Faraday Transactions 1 Vol -69

Interactions between metal cations and the ionophore lasalocid. Part 6.—Potentiometric and electron spin resonance study of the complexation of Gd³⁺ in methanol by lasalocid and simpler carboxylic acids

Content Provider	Royal Society of Chemistry (RSC)
Author	Juillard, Jean Mousset, Guy Tissier, Madeleine
Copyright Year	1989
Abstract	Complexes formed in methanol between the ionophore lasalocid and the Gd3+ ion have been studied using pHmetric, e.s.r. and u.v.–visible titration against tetrabutylammonium methoxide solution. The same has been done for salicylic and benzoic acids. In all cases the formation of the successive complexes AGd2+, A2Gd+ and A3Gd between the acid AH and the Gd3+ion has been observed and the corresponding formation constants were determined. More or less strong variation of the height, width and intensity of the e.s.r. line has been observed with the formation of the complexes; individual e.s.r. parameters could be had for most of the complexes. Comparison of data obtained for lasalocid and salicylic or benzoic acid suggests that in lasalocid anion–gadolinium cation complexes in methanol, the carboxylate group is the main and possibly the sole binding site of the gadolinium ion. Other complexes are formed in more basic media in methanol; these may involve the salicylate dianion, as shown for salicylic acid–gadolinium complexes, or, more probably, result from successive substitution of a methoxide ion for a lasalocid anion in A3Gd.
Starting Page	1337
Ending Page	1349
Page Count	13
File Format	PDF
ISSN	03009599
Volume Number	85
Issue Number	6
Journal	Journal of the Chemical Society, Faraday Transactions 1
DOI	10.1039/F19898501337
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Lasalocid Tetra-n-butylammonium bromide Islamic calendar Ion Gadolinium Titration Ionophore Methanol
Content Type	Text
Resource Type	Article
Subject	Chemistry

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Interactions between metal cations and the ionophore lasalocid. Part 6.—Potentiometric and electron spin resonance study of the complexation of Gd³⁺ in methanol by lasalocid and simpler carboxylic acids

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Interactions between metal cations and the ionophore lasalocid. Part 6.—Potentiometric and electron spin resonance study of the complexation of Gd3+ in methanol by lasalocid and simpler carboxylic acids

Interactions between metal cations and the ionophore lasalocid. Part 6.—Potentiometric and electron spin resonance study of the complexation of Gd³⁺ in methanol by lasalocid and simpler carboxylic acids