Campo DC | Valor | Idioma |
dc.contributor.author | Arantes, C. | - |
dc.contributor.author | Mendes, L. A. V. | - |
dc.contributor.author | Pinho, R. R. | - |
dc.contributor.author | Ferreira, M. | - |
dc.contributor.author | Souza, Gerardo Gerson Bezerra de | - |
dc.contributor.author | Rocha, A. B. | - |
dc.contributor.author | Rocco, M. L. M. | - |
dc.creator | Arantes, C. | - |
dc.creator | Mendes, L. A. V. | - |
dc.creator | Pinho, R. R. | - |
dc.creator | Ferreira, M. | - |
dc.creator | Souza, Gerardo Gerson Bezerra de | - |
dc.creator | Rocha, A. B. | - |
dc.creator | Rocco, M. L. M. | - |
dc.date.accessioned | 2013-09-02T18:02:02Z | - |
dc.date.available | 2013-09-02T18:02:02Z | - |
dc.date.issued | 2013 | - |
dc.identifier.issn | 0301-0104 | - |
dc.identifier.uri | http://www.repositorio.ufba.br/ri/handle/ri/12801 | - |
dc.description | Texto completo. Acesso restrito. p. 145–149 | pt_BR |
dc.description.abstract | Photon stimulated ion desorption (PSID) and Near-edge X-ray absorption fine structure (NEXAFS) studies
have been performed on poly(vinyl chloride) (PVC) and poly(vinyl dichloride) (PVDC) around the chlorine
1s-edge. Experiments were performed using a synchrotron source operating in the single-bunch mode
and a time-of-flight mass spectrometry for ion analysis. Cl+ ion yields, as a function of the photon energy,
reproduce the photoabsorption spectrum, showing significant increase at the 1s-resonance. Edge-jump
ratios, defined as the ratio between edge-jumps (intensity ratio of the yields between above and below
the absorption edge) of two different transitions, for Cl+ ion yields were much higher than the equivalent
electron yields, indicating site-selectivity in C–Cl bond breaking for both polymers, as a result of efficient
spectator Auger decay. The expected isotope ratio of 3:1 for chlorine was measured for PVC. The interpretation
of the NEXAFS spectrum was assisted by quantum mechanical calculations at a multireference perturbation
theory level. | pt_BR |
dc.language.iso | en | pt_BR |
dc.publisher | Chemical Physics | pt_BR |
dc.source | http://dx.doi.org/10.1016/j.chemphys.2013.01.003 | pt_BR |
dc.subject | Fotofragmentação | pt_BR |
dc.subject | Raios X | pt_BR |
dc.subject | Cloreto de vinila | pt_BR |
dc.subject | Vinil dicloreto | pt_BR |
dc.title | Site-selective photofragmentation of chlorinated polymeric films observed around the chlorine K-edge | pt_BR |
dc.title.alternative | Chemical Physics | pt_BR |
dc.type | Artigo de Periódico | pt_BR |
dc.description.localpub | Salvador | pt_BR |
dc.identifier.number | v. 415 | pt_BR |
Aparece nas coleções: | Artigo Publicado em Periódico (FIS)
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