التفاصيل البيبلوغرافية
| العنوان: |
The ionic KAl13 molecule: A stepping stone to cluster-assembled materials. |
| المؤلفون: |
W.-J. Zheng, Thomas, O. C., Lippa, T. P., S.-J. Xu, Bowen Jr., K. H. |
| المصدر: |
Journal of Chemical Physics; 4/14/2006, Vol. 124 Issue 14, p144304, 5p, 1 Diagram, 1 Chart, 3 Graphs |
| مصطلحات موضوعية: |
DIATOMIC molecules, MASS spectrometry, PHOTOELECTRON spectroscopy, ENERGY transfer, QUANTITATIVE chemical analysis, SPECTRUM analysis |
| مستخلص: |
Theoretical calculations by Khanna and Jena predicted KAl13 to be an ionically bonded, cluster-assembled “diatomic molecule,” i.e., K+Al13-. We have conducted both mass spectral and anion photoelectron spectroscopic studies on KAln-, finding a “dip” at n=13 in both their mass spectrum and in their electron affinity versus n trend. While these largely qualitative results are consistent with KAl13 being a salt, they can also be explained in terms of the shell model and thus, by themselves, are not conclusive. Quantitative comparisons between calculated photodetachment transition energies and the photoelectron spectrum of KAl13-, however, allow a strong case to be made for ionic bonding in KAl13. As a prototype for ionic bonding involving intact Al13- subunits, KAl13 may be a stepping stone toward forming ionic, cluster-assembled materials. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
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