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Journal

2007 | 5 | 4 | 1019-1063

Article title

Anomalously large kinetic isotope effect

Authors

Content

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Languages of publication

EN

Abstracts

EN
Activated diffusion of water between macromolecules in swollen cellulose is accompanied by anomalously high kinetic isotope effects of oxygen. The separation factor of heavy-oxygen water (H218O /H216O) is thousands of permilles instead of tens of permilles according to modern Absolute Rate Theory. This anomalous separation under usual conditions is disguised by the opposing process of very fast equalization to equilibrium through water-filled cellulose pores. This process is quicker by approximately 3 orders of magnitude than diffusion through the cellulose body. As a consequence, this opposition-directed equalization virtually eliminates the results of isotope separation. To reveal this anomaly it is necessary to suppress equalization, which was the primary problem for both discovery of this anomaly and its investigation. The method of investigating the anomalous separation in cellulose was developed with suppression of this negative influence. Discussion of the theoretical nature of the anomalous kinetic isotope effect is presented. This theoretical study would probably permit the discovery and use for isotope separation of the anomalously high isotope effect for other chemical elements, in particular, for those heavier than oxygen. [...]

Publisher

Journal

Year

Volume

5

Issue

4

Pages

1019-1063

Physical description

Dates

published
1 - 12 - 2007
online
12 - 9 - 2007

Contributors

author
  • Yozmot HaEmek Technological Incubator, P.O. Box 73, Migdal HaEmek, Israel, 23100

References

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Document Type

Publication order reference

Identifiers

YADDA identifier

bwmeta1.element.-psjd-doi-10_2478_s11532-007-0048-2
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