Acid-catalyzed oligomerization of glycerol investigated by electrospray ionization mass spectrometry

Journal of the Brazilian Chemical Society

Miguel A. Medeiros²  Maria H. Araujo²  Rodinei Augusti²  Luiz C. A. De Oliveira¹  Rochel M. Lago² 

[1] ,Universidade Federal de Minas Gerais Instituto de Ciências Exatas Departamento de QuímicaBelo Horizonte MG ,Brazil

关键词: electrospray ionization;    mass spectrometry;    glycerol;    oligomerization;    monitoring;   

DOI  :  10.1590/S0103-50532009000900015

来源: SciELO

【 摘 要 】

Acid-catalyzed oligomerization of glycerol was investigated by direct infusion electrospray ionization mass spectrometry in the positive ion mode, i.e. ESI(+)-MS. The ESI(+)-MS data revealed that at 280 ºC and in acidic medium (pH 2), glycerol undergoes successive intermolecular condensations to produce oligomeric species, i.e. [(glycerol)n - (n - 1) H2O] (n = 2-5). These ESI(+)-MS data, in association with the information provided by IR, ¹H and 13C NMR analyses, indicated that these oligomers undergo intramolecular dehydrations to form miscellaneous products comprised mainly by cyclic compounds as well as alkenes and carbonylic derivatives (aldehydes and ketones).

【 授权许可】

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