Vibrationally mediated photodissociation of ethyne isotopologues and homologues revisited.
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| Title: | Vibrationally mediated photodissociation of ethyne isotopologues and homologues revisited. |
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| Authors: | Bar, I.1, Rosenwaks, S.1 zamik@bgu.ac.il |
| Source: | Molecular Physics. 11/1/2012, Vol. 110 Issue 21/22, p2673-2686. 14p. |
| Subjects: | Acetylene, Vibrational spectra, Photodissociation, Comparative studies, Molecular dynamics, Band gaps, Rotational motion |
| Abstract: | The extensive studies on photodissociation of rovibrationally pre-excited ethyne isotopologues and homologues are reviewed. These studies are utilized here for comparing the dynamics of energy flow in C2H2 and C2HD to that in H3CC≡CH, D3CC≡CH and H3CH2CC CH. Evidence on the intramolecular dynamics comes from the extent of mode- and bond-selectivity in ethyne and its mono-deuterated variant and from the spectral linewidth in propyne and butyne. In the smaller species, rotational and vibrational mode- and bond-selective cleavage were observed, while in the larger ones mode-dependent lifetimes were found. The different behaviour of the two groups with regard to preferential bond-fission indicates that in the former the intramolecular vibrational distribution lifetime is on the ns timescale, whereas in the latter it is at least one order of magnitude shorter. These observations are interpreted following the recent progress in the understanding of the intramolecular dynamics of these species. [ABSTRACT FROM AUTHOR] |
| Copyright of Molecular Physics is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 83562151 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Vibrationally mediated photodissociation of ethyne isotopologues and homologues revisited. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Bar%2C+I%2E%22">Bar, I.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Rosenwaks%2C+S%2E%22">Rosenwaks, S.</searchLink><relatesTo>1</relatesTo><i> zamik@bgu.ac.il</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Molecular+Physics%22">Molecular Physics</searchLink>. 11/1/2012, Vol. 110 Issue 21/22, p2673-2686. 14p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Acetylene%22">Acetylene</searchLink><br /><searchLink fieldCode="DE" term="%22Vibrational+spectra%22">Vibrational spectra</searchLink><br /><searchLink fieldCode="DE" term="%22Photodissociation%22">Photodissociation</searchLink><br /><searchLink fieldCode="DE" term="%22Comparative+studies%22">Comparative studies</searchLink><br /><searchLink fieldCode="DE" term="%22Molecular+dynamics%22">Molecular dynamics</searchLink><br /><searchLink fieldCode="DE" term="%22Band+gaps%22">Band gaps</searchLink><br /><searchLink fieldCode="DE" term="%22Rotational+motion%22">Rotational motion</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The extensive studies on photodissociation of rovibrationally pre-excited ethyne isotopologues and homologues are reviewed. These studies are utilized here for comparing the dynamics of energy flow in C2H2 and C2HD to that in H3CC≡CH, D3CC≡CH and H3CH2CC CH. Evidence on the intramolecular dynamics comes from the extent of mode- and bond-selectivity in ethyne and its mono-deuterated variant and from the spectral linewidth in propyne and butyne. In the smaller species, rotational and vibrational mode- and bond-selective cleavage were observed, while in the larger ones mode-dependent lifetimes were found. The different behaviour of the two groups with regard to preferential bond-fission indicates that in the former the intramolecular vibrational distribution lifetime is on the ns timescale, whereas in the latter it is at least one order of magnitude shorter. These observations are interpreted following the recent progress in the understanding of the intramolecular dynamics of these species. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Molecular Physics is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1080/00268976.2012.706330 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 14 StartPage: 2673 Subjects: – SubjectFull: Acetylene Type: general – SubjectFull: Vibrational spectra Type: general – SubjectFull: Photodissociation Type: general – SubjectFull: Comparative studies Type: general – SubjectFull: Molecular dynamics Type: general – SubjectFull: Band gaps Type: general – SubjectFull: Rotational motion Type: general Titles: – TitleFull: Vibrationally mediated photodissociation of ethyne isotopologues and homologues revisited. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Bar, I. – PersonEntity: Name: NameFull: Rosenwaks, S. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 11 Text: 11/1/2012 Type: published Y: 2012 Identifiers: – Type: issn-print Value: 00268976 Numbering: – Type: volume Value: 110 – Type: issue Value: 21/22 Titles: – TitleFull: Molecular Physics Type: main |
| ResultId | 1 |
