Repulsive state (original) (raw)
In quantum mechanics, a repulsive state is an electronic state of a molecule for which there is no minimum in the potential energy. This means that the state is unstable and unbound since the potential energy smoothly decreases with the interatomic distance and the atoms repel one another. In such a state there are no discrete vibrational energy levels; instead, these levels form a continuum. This should not be confused with an excited state, which is a metastable electronic state containing a minimum in the potential energy, and may be short or long-lived.
| Property | Value |
|---|---|
| dbo:abstract | In quantum mechanics, a repulsive state is an electronic state of a molecule for which there is no minimum in the potential energy. This means that the state is unstable and unbound since the potential energy smoothly decreases with the interatomic distance and the atoms repel one another. In such a state there are no discrete vibrational energy levels; instead, these levels form a continuum. This should not be confused with an excited state, which is a metastable electronic state containing a minimum in the potential energy, and may be short or long-lived. When a molecule is excited by means such as UV/VIS spectroscopy it can undergo a molecular electronic transition: if such a transition brings the molecule into a repulsive state, it will spontaneously dissociate. This condition is also known as predissociation since the chemical bond is broken at an energy which is lower than what might be expected. In electronic spectroscopy, this often appears as a strong, continuous feature in the absorption or emission spectrum, making repulsive states easy to detect. For example, triatomic hydrogen has a repulsive ground state, which means it can only exist in an excited state: if it drops down to the ground state, it will immediately break up into one of the several possible dissociation products. (en) |
| dbo:wikiPageExternalLink | https://archive.org/details/modernspectrosco0000holl_t7j3/page/253 |
| dbo:wikiPageID | 35548904 (xsd:integer) |
| dbo:wikiPageLength | 1941 (xsd:nonNegativeInteger) |
| dbo:wikiPageRevisionID | 1122255353 (xsd:integer) |
| dbo:wikiPageWikiLink | dbr:Potential_energy dbr:Quantum_mechanics dbr:Molecule dbr:Electronic_state dbr:John_Wiley_&_Sons dbr:Chemical_bond dbr:Emission_spectrum dbr:Triatomic_hydrogen dbr:Absorption_spectrum dbc:Spectroscopy dbr:Dissociation_(chemistry) dbr:Metastable dbr:Excited_state dbr:Molecular_electronic_transition dbr:Molecular_vibration dbr:UV/VIS_spectroscopy |
| dbp:wikiPageUsesTemplate | dbt:Cite_book dbt:No_footnotes dbt:Short_description dbt:Spectroscopy-stub |
| dct:subject | dbc:Spectroscopy |
| gold:hypernym | dbr:State |
| rdf:type | dbo:PopulatedPlace |
| rdfs:comment | In quantum mechanics, a repulsive state is an electronic state of a molecule for which there is no minimum in the potential energy. This means that the state is unstable and unbound since the potential energy smoothly decreases with the interatomic distance and the atoms repel one another. In such a state there are no discrete vibrational energy levels; instead, these levels form a continuum. This should not be confused with an excited state, which is a metastable electronic state containing a minimum in the potential energy, and may be short or long-lived. (en) |
| rdfs:label | Repulsive state (en) |
| owl:sameAs | freebase:Repulsive state wikidata:Repulsive state https://global.dbpedia.org/id/4tgv7 |
| prov:wasDerivedFrom | wikipedia-en:Repulsive_state?oldid=1122255353&ns=0 |
| foaf:isPrimaryTopicOf | wikipedia-en:Repulsive_state |
| is dbo:wikiPageWikiLink of | dbr:Argon_fluoride_laser dbr:Krypton dbr:Krypton_fluoride_laser dbr:Vibronic_spectroscopy dbr:Triatomic_hydrogen dbr:Coulomb_explosion dbr:Excimer dbr:Excimer_laser dbr:Excited_state |
| is foaf:primaryTopic of | wikipedia-en:Repulsive_state |