Phosphoryl-containing acidic podands as extractants for recovery of f-elements 3. Dependence of the degree of association of podands on the nature of substituent and concentration in water–methanol solutions

The degree of association of phosphoryl-containing acidic podands 2-[(HO)(RO)(O)P]-4R´-C 6 H 4 -(OCH 2 CH 2 ) 2 -OC 6 H 4 -4-R´-2-[P(O)(OR)(OH)], where R = Et, R´ = H ( 1 ); R = Bu, R´ = Et ( 2 ) was determined by the diffusion method in 1,2-dichloroethane, 1,2-dichloroethane saturated with water, a...

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Bibliographic Details
Published inRussian chemical bulletin Vol. 64; no. 1; pp. 224 - 227
Main Authors Timofeeva, G. I., Matveeva, A. G., Safiulina, A. M., Ivanets, D. V., Kudryavtsev, E. M., Baulin, V. E., Tsivadze, A. Yu
Format Journal Article
LanguageEnglish
Published New York Springer US 2015
Subjects
Brief Communications
Chemistry
Chemistry and Materials Science
Chemistry/Food Science
Inorganic Chemistry
Organic Chemistry
diphosphonic acids
phosphoryl podands
diffusion
associates
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Summary:The degree of association of phosphoryl-containing acidic podands 2-[(HO)(RO)(O)P]-4R´-C 6 H 4 -(OCH 2 CH 2 ) 2 -OC 6 H 4 -4-R´-2-[P(O)(OR)(OH)], where R = Et, R´ = H ( 1 ); R = Bu, R´ = Et ( 2 ) was determined by the diffusion method in 1,2-dichloroethane, 1,2-dichloroethane saturated with water, and water–methanol (1: 7 vol/vol) solutions. Under the same experimental conditions (25 ΰC, 0.01 M solutions in aqueous methanol), podand 1 exists as trimers ( n = 3), whereas podand 2 forms associates consisting of about 30 particles. Unlike podand 1 , the degree of association of podand 2 depends on the solute concentration. According to the IR spectral data for 1,2-dichloroethane solutions, associates of both podands are formed due to strong hydrogen bonds involving P(O)OH groups.
ISSN:1066-5285
1573-9171
DOI:10.1007/s11172-015-0847-0