Thermodynamic Behavior of a Supramolecular System Self-Assembled by Electrostatic Interaction in Aqueous Solution. Results and Theoretical Analysis

Journal of Physical Chemistry B

Volumn 103, Issue 49, 1999, Pages 10866-10875

  Jullien, Ludovic ^a   Cottet, Hervé ^b   Hamelin, Bertrand ^a   Jardy, Alain ^b  

^a ECOLE NORMALE SUPÉRIEURE   (France)

^b CNRS   (France)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0001597844     PISSN: 15206106     EISSN: None     Source Type: Journal    
DOI: 10.1021/jp990906v     Document Type: Article

References (34)

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10. ij.
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14. 0, ...).
15. In the present system, the structural investigation reported in ref 4 suggests this assumption to be reasonable.
16. 3 At that time, the cyclodextrin backbone was simply modeled as a sphere.
17. 3 the reference system was taken as the infinitely diluted solution at the ionic strength that was used during the potentiometric titration. Thus the activity coefficients were only measuring the interaction between the (diluted) cyclodextrin species. In the present case, the activity coefficient expresses the interaction of the cyclodextrin species with all the species present in solution.
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19. See ref 10 for taking into account a discontinuity of the dielectric constant.
20. See ref 15, T1, p 156.
21. See ref 15, T1, p 157.
22. int for the three investigated CDp(Am) were found equal (see Table 3). On the basis of the identical molecular structure and environment of each glucose unit in the CDp(Am) series, such a result points out that the solvation of the opposite side of the CD primary rim does not considerably affect the primary solvation shell of given amino groups. Moreover, models C and D provide consistent structural results without special adjusment for any particular CDp(Am) derivative. Hence, these results suggest the medium description as a continuum to be appropriate at the nanometer scale for evaluating the charge-charge interaction in the present system. The same conclusion arises from the investigation of the associative properties between the different series of oppositely charged cyclodextrins. The similar behaviors of the three investigated couples conform to the theoretical expectations predicted by model B/C without introducing any scale-or symmetry-dependent factor.
23. 4 demonstrated the distance d between oppositely charged CD to be about 0.6 nm. Both characteristic distances lie above a few diameters of the water molecule. Thus it seems reasonable that the detailed structure of the solvent can be ignored in the present system. At shorter characteristic distances that directly concern the primary solvation shells, scale or symmetry factors could be more prone to manifest themselves.
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31. ij with some other parameter like i that would evaluate the number of pairs of closest interacting opposite charges when i = j. See, for instance: Schneider, H.-J. Angew. Chem., Int. Ed. Engl. 1991, 30, 1417. Schneider, H.-J. Chem. Soc. Rev. 1994, 227 and references therein.
32. ij with some other parameter like i that would evaluate the number of pairs of closest interacting opposite charges when i = j. See, for instance: Schneider, H.-J. Angew. Chem., Int. Ed. Engl. 1991, 30, 1417. Schneider, H.-J. Chem. Soc. Rev. 1994, 227 and references therein.
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