✦ LIBER ✦
Effect of conformational changes on the reversed-phase chromatographic retention of polyoxyethylenes: quantitative interpretation based on a retention model in combination with molecular mechanics
✍ Scribed by Tetsuo Okada
- Publisher
- Elsevier Science
- Year
- 1993
- Tongue
- English
- Weight
- 782 KB
- Volume
- 281
- Category
- Article
- ISSN
- 0003-2670
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✦ Synopsis
The reversed-phase chromatographic retention of compounds having polyoayethylene (POE) as a part of the structure is known to be affected by conformational changes of the POE chains. A modified two-state model, where zig-zag and helii conformers are assumed to be more stable than others, was developed to evaluate the conformational changes and applied to the calculation of the conformational equilibria, the evaluation of the contributions from the stable conformers to the overall retention and the prediction of retention. Molecular mechanics calculation was also used to evaluate the solution behaviour of POE chains.