Charge remote fragmentation: Difference between revisions
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Fragmentation of an ion in which the cleaved bond is not adjacent to the apparent charge site. | Fragmentation of an ion in which the cleaved bond is not adjacent to the apparent charge site. | ||
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Fragmentation of an [[ion]] in which the cleaved bond is isolated from the apparent charge site by a distance of several bond lengths. | |||
Related term: [[charge-mediated fragmentation]]. | |||
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#A. Savagnac, H. Aurelle, C. Casas, F. Couderc, P. Gavard, D. Prome, J. C. Prome. Chem. Phys. Lipids 51, 31-38 (1989). | |||
#K. B. Tomer, N. J. Jensen, M. L. Gross, J. Whitney. Biomed. Env. Mass Spectrom. 13, 265-272 (1986). | |||
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Revision as of 22:57, 7 April 2010
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| ASMS TERMS AND DEFINITIONS POSTER ENTRY |
| Charge remote fragmentation |
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Decompositions that occur without any obvious involvement of the charge site. These reactions may be of closed-shell species and have thermal analogies or be of radical ions and be radical-site induced. One requirement is a stable charge site, which is usually closed shell, stable, and localized (e.g., -COO-, -COOLi2+, -OHNa+, -SO3-, etc.). The reactions are particularly useful in locating functional groups in aliphatic chains such as in fatty acids, surfactants, lipids, steroids but also occur for peptides and other biomolecules. Many charge-remote fragmentations require high-energy collisional activation but others have low-energy requirements and are seen at metastable-ion decompostions or under low-energy collisional conditions. |
| ASMS Terms and Definitions Poster |
