Topology and Stability of Trivalent Polyhedral Clusters |
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Authors: | Yuansheng Jiang Yihan Shao Edward C Kirby |
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Affiliation: |
a Department of Chemistry, Nanjing University, Nanjing, China
b Resource Use Institute 14 Lower Oakfield, Pitlochry, Perthshire, Scotland UK |
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Abstract: | An algorithm to generate the molecular graphs of the trivalent clusters is presented. All the polyhedral trivalent cages with 4-16 vertices are enumerated, with particular attention being given to their symmetry, spectra and stability. The relative stability of isomers is not decided solely by their symmetry. A new kind of spectral phenomenon is reported. This is the occurrence of graphs having the same HOMO-LUMO gap, the same E and the same even-order moments. We refer to it as 'pseudo-isospectrality'. |
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Keywords: | |
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