Artículos de revistas
Fullerenes In Asphaltenes And Other Carbonaceous Materials: Natural Constituents Or Laser Artifacts
Registro en:
Analyst. Royal Soc Chemistry, v. 141, p. 2767 - 2773, 2016.
0003-2654
1364-5528
WOS:000374957000019
10.1039/c5an02333e
Autor
Santos
Vanessa G.; Fasciotti
Maira; Pudenzi
Marcos A.; Klitzke
Clecio F.; Nascimento
Heliara L.; Pereira
Rosana C. L.; Bastos
Wagner L.; Eberlin
Marcos N.
Institución
Resumen
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) The presence of fullerenes as natural constituents of carbonaceous materials or their formation as laser artifacts during laser desorption ionization (LDI) mass spectrometry (MS) analysis is reinvestigated and reviewed. The results using asphaltene samples with varying composition as well as standard polycyclic aromatic hydrocarbons (PAH) and fullerene samples as models have demonstrated that indeed C-n ring fullerenes are not natural constituents but they are formed as common and often as predominant artifacts upon laser radiation, and a series of incorrect assignments based on LDI-MS data of several carbonaceous materials seems unfortunately to have been made. When the present results are evaluated also in the light of the vast literature on LDI-MS of carbonaceous materials, the formation of fullerene artifacts seems particularly common for LDI-MS analysis of asphaltenes and other carbonaceous samples with considerably high levels of PAH and varies according to the type of laser used, and the intensity of the laser beam. 141 9 2767 2773 FINEP FAPESP CNPq PETROBRAS Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)