Phosphine and phosphine oxide groups in metal-organic frameworks detected by P K-edge XAS.
Phys Chem Chem Phys
; 17(5): 3326-31, 2015 Feb 07.
Article
em En
| MEDLINE
| ID: mdl-25523824
ABSTRACT
Phosphine metal-organic frameworks (P-MOFs) are crystalline porous coordination polymers that contain phosphorus functional groups within their pores. We present the use of X-ray absorption spectroscopy (XAS) at the P K-edge to determine the phosphine to phosphine oxide ratio in two P-MOFs with MIL-101 topology. The phosphorus oxidation state is of particular interest as it strongly influences the coordination affinity of these materials for transition metals. This method can determine the oxidation state of phosphorus even when the material contains paramagnetic nuclei, differently from NMR spectroscopy. We observed that phosphine in LSK-15 accounts for 72 ± 4% of the total phosphorus groups and that LSK-12 contains only phosphine oxide.
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Base de dados:
MEDLINE
Assunto principal:
Compostos Organometálicos
/
Fosfinas
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Espectroscopia por Absorção de Raios X
Idioma:
En
Revista:
Phys Chem Chem Phys
Assunto da revista:
BIOFISICA
/
QUIMICA
Ano de publicação:
2015
Tipo de documento:
Article
País de afiliação:
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