Direct evidence of hydrogen-atom tunneling dynamics in the excited state hydrogen transfer (ESHT) reaction of phenol–ammonia clusters

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dc.contributor.authorRodríguez, Javier
dc.contributor.authorGonzález, Marta
dc.contributor.authorRubio-Lago, Luis
dc.contributor.authorBañares Morcillo, Luis
dc.date.accessioned2024-01-22T10:32:31Z
dc.date.available2024-01-22T10:32:31Z
dc.date.issued2014
dc.description.abstractThe photodynamics of phenol–ammonia clusters, PhOH(NH3)3–5, after one UV photon absorption, has been investigated using velocity map imaging of the NH4(NH3)2–4 cluster products. The dependence of the NH4(NH3)2 translational energy distributions on the available energy reveals three dynamical regions in close correspondence with the photodissociation of bare phenol. At low excitation energies (between 282 and 260 nm), the NH4(NH3)2 distribution mirrors the hydrogen-atom passage through the 11 pp*–11 ps* barrier, constituting the first evidence of hydrogen-atom tunneling dynamics in an excited state hydrogen transfer (ESHT) reaction. At excitation wavelengths below 260 nm, the product distributions are consistent with two separate barrierless dissociation processes associated, respectively, with excitation to the 11 pp* and 21 pp* excited electronic states. Similar conclusions can be derived from the velocity map imaging results on the larger NH4(NH3)3,4 cluster products.
dc.description.departmentDepto. de Química Física
dc.description.facultyFac. de Ciencias Químicas
dc.description.refereedTRUE
dc.description.sponsorshipMinisterio de Economía y Competitividad (España)
dc.description.sponsorshipMinisterio de Ciencia, Innovación y Universidades (España)
dc.description.statuspub
dc.identifier.doi10.1039/c3cp54362e
dc.identifier.essn1463-9084
dc.identifier.issn1463-9076
dc.identifier.officialurlhttps://doi.org/10.1039/c3cp54362e
dc.identifier.urihttps://hdl.handle.net/20.500.14352/94291
dc.issue.number8
dc.language.isoeng
dc.rightsAttribution-NoDerivatives 4.0 Internationalen
dc.rights.accessRightsrestricted access
dc.rights.urihttp://creativecommons.org/licenses/by-nd/4.0/
dc.subject.cdu544
dc.subject.ucmQuímica física (Química)
dc.subject.unesco2307 Química Física
dc.titleDirect evidence of hydrogen-atom tunneling dynamics in the excited state hydrogen transfer (ESHT) reaction of phenol–ammonia clusters
dc.typejournal article
dc.type.hasVersionVoR
dspace.entity.typePublication
relation.isAuthorOfPublicationb2340482-256f-41d0-ad15-29806cf6a753
relation.isAuthorOfPublication.latestForDiscoveryb2340482-256f-41d0-ad15-29806cf6a753
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