Molecular characterization of brominated persistent pollutants using extended X-ray absorption fine structure (EXAFS) spectroscopy.
Anal Bioanal Chem
; 390(3): 921-8, 2008 Feb.
Article
em En
| MEDLINE
| ID: mdl-17999054
ABSTRACT
X-ray absorption fine structure (EXAFS) spectroscopy spectra were collected for three brominated persistent pollutants 6-bromo-2,4,5-trichlorophenol (BrTriClP), pentabromophenol (PentaBrP) and 3,3',5,5'-tetrabromobisphenol A (TBBA). The substances were selected to be symmetrical (BrTriClP and TBBA) or asymmetrical (PentaBrP) with respect to the atomic Br positions and to differ in the number of bromine and other halide atoms, as well as their relative positions. The asymmetrical PentaBrP was modelled with special detail as not all bromine atoms have identical coordination environments. The studied substances displayed unique EXAFS spectra, which could be used to determine the molecular structure in fair detail. We conclude that EXAFS spectroscopy is a suitable technique for molecular characterization of the comparatively complex molecules within the class of compounds of brominated organic persistent pollutants. A detailed understanding of the EXAFS spectra of the pure compounds opens up possibilities to study the interactions with soil and sediment matrices by means of EXAFS spectroscopy. Figure Brominated organic persistent pollutants are characterized by EXAFS spectroscopy.
Buscar no Google
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Espectrometria por Raios X
/
Técnicas de Química Analítica
/
Poluentes Atmosféricos
Tipo de estudo:
Risk_factors_studies
Idioma:
En
Revista:
Anal Bioanal Chem
Ano de publicação:
2008
Tipo de documento:
Article
País de afiliação:
Suécia