Time-resolved luminescence studies in hydrogen uranyl phosphate intercalated with amines

dc.creatorNovo, JBM
dc.creatorBatista, FR
dc.creatorda Cunha, CJ
dc.creatorDias, LC
dc.creatorPessine, FBT
dc.date2007
dc.dateMAY
dc.date2014-11-15T13:16:07Z
dc.date2015-11-26T17:20:07Z
dc.date2014-11-15T13:16:07Z
dc.date2015-11-26T17:20:07Z
dc.date.accessioned2018-03-29T00:07:45Z
dc.date.available2018-03-29T00:07:45Z
dc.identifierJournal Of Luminescence. Elsevier Science Bv, v. 124, n. 1, n. 133, n. 139, 2007.
dc.identifier0022-2313
dc.identifierWOS:000243622800022
dc.identifier10.1016/j.jlumin.2006.02.009
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/77893
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/77893
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/77893
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1283059
dc.descriptionTime-resolved luminescence decays of intercalated compounds of hydrogen uranyl phosphate (HUP) with p-toluidinium (HUPPT), benzylaminium (HUPBZ), alpha-methylbenzylaminium (HUPMBZ) and hydroxylaminium (HUPHAM) were studied. The prepared compounds belong to the tetragonal P4/ncc space group and showed 00 1 reflections shifted to lower angles relative to HUP, indicating that the intercalation increases the c parameter of the unit cell. The luminescence decays of the compounds with 100% of intercalation ratio (HUPHAM and HUPBZ) were analyzed by Global Analysis, assuming Lianos' stretched exponential as the model function, which can be applied to compounds with restricted geometry and mobile donor and quencher molecules. It was remarkable that the luminescence decays showed that the quenching of the emission of the uranyl ions by the intercalated protonated amines is not restricted by low dimensionality of the host uranyl phosphate, and that a diffusion mechanism occurs. Benzylaminium cation efficiently quenches the excited energy of the uranyl ions at close distance, but the long-range and long-lifetime quenching is hindered. A different situation is found in the case of the small hydroxylaminium cation, where the long distance diffusion of the species is fast, playing ail important role in the quenching of the excited uranyl ions at longer times. (c) 2006 Elsevier B.V. All rights reserved.
dc.description124
dc.description1
dc.description133
dc.description139
dc.languageen
dc.publisherElsevier Science Bv
dc.publisherAmsterdam
dc.publisherHolanda
dc.relationJournal Of Luminescence
dc.relationJ. Lumines.
dc.rightsfechado
dc.rightshttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dc.sourceWeb of Science
dc.subjecthydrogen uranyl phosphate
dc.subjectamines
dc.subjecttime-resolved
dc.subjectluminescence
dc.subjectglobal analysis
dc.subjectrestricted geometry
dc.subjectLayered Uranium(vi) Compounds
dc.subjectExcited-state Properties
dc.subjectRestricted Geometries
dc.subjectElectronic-structure
dc.subjectProton Conductivity
dc.subjectMetal-complexes
dc.subjectEnergy-transfer
dc.subjectOptical Probes
dc.subjectCitrobacter-sp
dc.subjectIon-exchange
dc.titleTime-resolved luminescence studies in hydrogen uranyl phosphate intercalated with amines
dc.typeArtículos de revistas


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