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Selectivity and efficiency of pyrene attachment to alkanes induced by broadband X-rays
Brown, Gerald O; Guardala, Noel A; Price, Jack L; Weiss, Richard G.
Afiliação
  • Brown, Gerald O; Georgetown University. Department of Chemistry. Washington. US
  • Guardala, Noel A; Naval Surface Warfare Center. Carderock Division. Bethesda. US
  • Price, Jack L; Naval Surface Warfare Center. Carderock Division. Bethesda. US
  • Weiss, Richard G; Georgetown University. Department of Chemistry. Washington. US
An. acad. bras. ciênc ; 75(1): 33-38, Mar. 2003. graf
Article em En | LILACS | ID: lil-331142
Biblioteca responsável: BR1.1
RESUMO
Bombardment of pyrene-doped n-heneicosane (C21H44) in its orthorhombic solid phase with <1.3> MeV broadband X-rays results in the formation of both mono- and di-heneicosylpyrenes, whereas the same dose in liquid cyclohexane yields only monosubstituted pyrene. In both cases, the reaction efficiency decreases as pyrene concentration is increased from 10-5 to 10-2 M. Qualitatively, the overall attachment efficiency is higher in orthorhombic n-heneicosane than in liquid cyclohexane, but the selectivity of attachment is greater in cyclohexane. Differences between these results and those from irradiations of the same samples with eV range photons are discussed
Assuntos
Texto completo: 1 Coleções: 01-internacional Base de dados: LILACS Assunto principal: Pirenos / Cicloexanos / Alcanos Idioma: En Revista: An. acad. bras. ciênc Assunto da revista: CIENCIA Ano de publicação: 2003 Tipo de documento: Article País de afiliação: Estados Unidos País de publicação: Brasil
Texto completo: 1 Coleções: 01-internacional Base de dados: LILACS Assunto principal: Pirenos / Cicloexanos / Alcanos Idioma: En Revista: An. acad. bras. ciênc Assunto da revista: CIENCIA Ano de publicação: 2003 Tipo de documento: Article País de afiliação: Estados Unidos País de publicação: Brasil