Journal article
Can super-excited molecules survive fragmentation?
Journal of radioanalytical and nuclear chemistry, v 247(3), pp 589-591
01 Mar 2001
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
An Auger event triggered by electron-capture (EC) decay of Co-57 incorporated in a chelate molecule results in the loss of an average of 5 electrons. During subsequent charge neutralization, the molecule acquires >50 eV of excitation energy. Only molecules having a large pi -electron system were found to escape fragmentation. The fate of the molecule was followed by the 14.4 keV Mossbauer emission which occurs 10(-7) second after the EC event. For a conjugated molecule to survive fragmentation, it should be able to disperse its energy in a time interval shorter than the period of atomic vibrations. We had proposed earlier that p-electrons undergo collective excitation and that the plasmon decays in <10(-14) second accompanied by ejection of an electron leaving the molecule unscathed. Intermolecular energy transfer is not important and even an isolated molecule of Co-57(II) phthalocyanine encapsulated in a zeolite supercage escapes fragmentation following an Auger event. Our model for rapid disposal of large excitation energy receives additional support from recent reports of single or mulitphoton plasmon excitation (<similar to>20 eV) in an isolated C-60 and C-70 fullerene molecule followed by ejection of a single energetic electron leaving the molecule intact.
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Details
- Title
- Can super-excited molecules survive fragmentation?
- Creators
- A Nath - Drexel UniversityM J Prushan - Drexel UniversityJ G Gilbert - Drexel University
- Publication Details
- Journal of radioanalytical and nuclear chemistry, v 247(3), pp 589-591
- Publisher
- KLUWER ACADEMIC PUBL
- Number of pages
- 3
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- [Retired Faculty]; Chemistry
- Web of Science ID
- WOS:000167715700023
- Scopus ID
- 2-s2.0-0035100377
- Other Identifier
- 991019169593404721
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InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Chemistry, Analytical
- Chemistry, Inorganic & Nuclear
- Nuclear Science & Technology