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Revisiting the Nonadiabatic Process in 1,2-Dioxetane
KTH, School of Biotechnology (BIO), Theoretical Chemistry and Biology. (Theoretical Chemistry & Biology)ORCID iD: 0000-0002-8453-5664
2013 (English)In: Journal of Chemical Theory and Computation, ISSN 1549-9618, E-ISSN 1549-9626, Vol. 9, p. 5404-5411Article in journal (Refereed) Published
Abstract [en]

Determining the ground and excited-statedecomposition mechanisms of 1,2-dioxetane is essential tounderstand the chemiluminescence and bioluminescencephenomena. Several experimental and theoretical studies hasbeen performed in the past without reaching a converged description. The reason is in part associated with the complex nonadiabatic process taking place along the reaction. The present study is an extension of a previous work (De Vico, L.;Liu, Y.-J.; Krogh, J. W.; Lindh, R. J. Phys. Chem. A 2007, 111,8013−8019) in which a two-step mechanism was established for the chemiluminescence involving asynchronous O−O′ andC−C′ bond dissociations. New high-level multistate multiconfigurational reference second-order perturbation theory calculations and ab initio molecular dynamics simulations at constant temperature are performed in the present study, which provide further details on the mechanisms and allow to rationalize further experimental observations. In particular, the new results explain the high ratio of triplet to singlet dissociation products.

Place, publisher, year, edition, pages
2013. Vol. 9, p. 5404-5411
National Category
Theoretical Chemistry
Research subject
Chemistry
Identifiers
URN: urn:nbn:se:kth:diva-215147DOI: 10.1021/ct4007844OAI: oai:DiVA.org:kth-215147DiVA, id: diva2:1146642
Note

QC 20171004

Available from: 2017-10-03 Created: 2017-10-03 Last updated: 2017-10-04Bibliographically approved

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Farahani, Pooria

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