✦ LIBER ✦
Cryptate 13C and 23Na nuclear magnetic relaxation as a probe of counterion dynamics in aqueous polyacrylate solutions
✍ Scribed by J.R.C. Van Der Maarel; D. Van Duijn; J. De Bleijser; J.C. Leyte
- Publisher
- Elsevier Science
- Year
- 1987
- Tongue
- English
- Weight
- 448 KB
- Volume
- 135
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
In a series of fully alkali neutralized polyacrylate solutions the counterions are included by a macrobicyclic l&and (cryptand) to form a well-defined coordination shell. Vapor pressure experiments show the polyacrylate-cryptate system to behave osmotically as an ordinary polyelectrolyte solution. Cryptate ')C and *3Na relaxation show that the influence of polyions on the counterion reorientational mobility is moderate. The main r3Na relaxation mechanism is found to be the fluctuating electric field gradient caused by the surrounding ligand.