Structural Changes of Conjugated Pt-Containing Polymetallaynes Exposed to Gamma Ray Radiation Doses
Nenhuma Miniatura disponível
Data
2012-08-30
Autores
Fratoddi, Ilaria
Bronze-Uhle, Erika S. [UNESP]
Batagin-Neto, Augusto [UNESP]
Fernandes, David M. [UNESP]
Bodo, Enrico
Battocchio, Chiara
Venditti, Iole
Decker, Franco
Russo, Maria Vittoria
Polzonetti, Giovanni
Título da Revista
ISSN da Revista
Título de Volume
Editor
Amer Chemical Soc
Resumo
The effect of Co-60 gamma rays irradiation on the polymetallayne [-Pt(PBu3)-C C-C6H4-C6H4-C C-](n) (Pt-DEBP) of defined chain length corresponding to 10 repeat units, has been studied in detail. The UV-vis absorption spectra of Pt-DEBP have been recorded in solution upon exposure of the polymetallayne at increasing radiation doses in the range up to 90 Gy, with special care to the features related to low doses. Complex modifications of the chemical structure of Pt-DEBP could be accessed through NMR, FTIR, GPC, and XPS characterizations, which support the attack of Cl and H radicals coming from the radiolysis of the solvent, CHCl3, to the triple C C bonds of the backbone, leading to the formation of chlorinated double and single C-C bonds, with a concomitant increase of the molecular weight due to a recombinant effect of oligomer fragments upon irradiation. The presence of vinyl and single chlorinated moieties has been sustained from the simulation of the UV-vis spectra based on theoretical calculations.
Descrição
Palavras-chave
Como citar
Journal of Physical Chemistry A. Washington: Amer Chemical Soc, v. 116, n. 34, p. 8768-8774, 2012.