Selectivity and efficiency of pyrene attachment to alkanes induced by broadband X-rays
An. acad. bras. ciênc
; 75(1): 33-38, Mar. 2003. graf
Artigo
em Inglês
| 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
Texto completo:
Disponível
Coleções:
Bases de dados internacionais
Base de dados:
LILACS
Assunto principal:
Pirenos
/
Cicloexanos
/
Alcanos
Idioma:
Inglês
Revista:
An. acad. bras. ciênc
Assunto da revista:
Ciência
Ano de publicação:
2003
Tipo de documento:
Artigo
País de afiliação:
Estados Unidos
Instituição/País de afiliação:
Georgetown University/US
/
Naval Surface Warfare Center/US