An Influence of the Spatial Arrangement, Length of the Alkyl Chain and Temperature on Micellar Properties of N-Alkyl-N-{[2-(benzyloxy)cyclohexylmethyl]}-N,N-dimethylammonium Bromides in Aqueous Solutions

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Title:An Influence of the Spatial Arrangement, Length of the Alkyl Chain and Temperature on Micellar Properties of N-Alkyl-N-{[2-(benzyloxy)cyclohexylmethyl]}-N,N-dimethylammonium Bromides in Aqueous Solutions
Creators:
Oremusová, Jarmila
Mislovičová, Veronika
Journal or Publication Title:
Collection of Czechoslovak Chemical Communications, 62, 12, pp. 1853-1862
Uncontrolled Keywords:Micellization, Temperature dependence, Phenylcarbamates, Micelles

Abstract

In this work we study influence of the length of the alkyl chain and temperature on critical micellar concentration (CMC) for <i>cis </i>and <i>trans </i>diastereoisomers of the <i>N</i>-alkyl-<i>N</i>-{[2-(benzyloxy)cyclohexylmethyl]}-<i>N</i>,<i>N</i>-dimethylammonium bromides in aqueous solutions using conductometric and spectrophotometric techniques. From the measured dependences, the degree of the counterion binding (β) and thermodynamic parameters of micellization (∆<i>G</i><sub>m</sub><sup>0</sup>, ∆<i>H</i><sub>m</sub><sup>0</sup>, ∆<i>S</i><sub>m</sub><sup>0</sup>) were calculated and compared with the literature data on similar compounds. The results show that lengthening of the alkyl chain by one methylene group causes approximately a two-fold reduction in CMC. The β values decrease with temperature and with increasing length of the alkyl chain. While only a small decrease in the ∆<i>G</i><sub>m</sub><sup>0</sup> values (<i>ca</i> 1 kJ mol<sup>-1</sup>) due to increasing temperature was found, the decrease in ∆<i>H</i><sub>m</sub><sup>0</sup> is much more pronounced.

Title:An Influence of the Spatial Arrangement, Length of the Alkyl Chain and Temperature on Micellar Properties of N-Alkyl-N-{[2-(benzyloxy)cyclohexylmethyl]}-N,N-dimethylammonium Bromides in Aqueous Solutions
Creators:
Oremusová, Jarmila
Mislovičová, Veronika
Uncontrolled Keywords:Micellization, Temperature dependence, Phenylcarbamates, Micelles
Divisions:Life and Chemical Sciences > Institute of Organic Chemistry and Biochemistry > Collection of Czechoslovak Chemical Communications
Journal or Publication Title:Collection of Czechoslovak Chemical Communications
Volume:62
Number:12
Page Range:pp. 1853-1862
ISSN:0010-0765
E-ISSN:1212-6950
Publisher:Institute of Organic Chemistry and Biochemistry
Related URLs:
URLURL Type
http://dx.doi.org/10.1135/cccc19971853UNSPECIFIED
ID Code:1259
Item Type:Article
Deposited On:06 Feb 2009 17:08
Last Modified:06 Feb 2009 16:08

Citation

Oremusová, Jarmila; Mislovičová, Veronika (1997) An Influence of the Spatial Arrangement, Length of the Alkyl Chain and Temperature on Micellar Properties of N-Alkyl-N-{[2-(benzyloxy)cyclohexylmethyl]}-N,N-dimethylammonium Bromides in Aqueous Solutions. Collection of Czechoslovak Chemical Communications, 62 (12). pp. 1853-1862. ISSN 0010-0765

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