Evidence of CO(2) molecule acting as an electron acceptor on a nanoporous metal-organic-framework MIL-53 or Cr(3+)(OH)(O(2)C-C(6)H(4)-CO(2)).
The adsorption mode of CO(2) at low coverage in the nanoporous metal benzenedicarboxylate MIL-53(Cr) or Cr(3+)(OH)(O(2)C-C(6)H(4)-CO(2)) has been identified using IR spectroscopy; the red shift of the nu(3) band and the splitting of the nu(2) mode of CO(2) in addition to the shifts of the nu(OH) and delta(OH) bands of the MIL-53(Cr) hydroxyl groups provide evidence that CO(2) interacts with the oxygen atoms of framework OH groups as an electron-acceptor via its carbon atom; this is the first example of such an interaction between CO(2) and bridged OH groups in a solid.
Laboratoire Catalyse et Spectrochimie, UMR 6506, CNRS-ENSICAEN-Université de CAEN, 6, Bd du Maréchal Juin, F-14050, Caen Cedex, France. alexandre.vimont@ensicaen.fr
Alexandre
A
Vimont
Arnaud
A
Travert
Philippe
P
Bazin
Jean-Claude
JC
Lavalley
Marco
M
Daturi
Christian
C
Serre
Gérard
G
Férey
Sandrine
S
Bourrelly
Philip L
PL
Llewellyn