Hydrothermal synthesis of two cationic bismuthate clusters: an alkylenedisulfonate bridged hexamer, [Bi6O4(OH)4(H2O)2][(CH2)2(SO3)2]3 and a rare nonamer templated by triflate, [Bi9O8(OH)6][CF3SO3]5.
This paper reports the synthesis, characterization, and application of two cationic bismuthate clusters by anion templating. The compounds were synthesized under mild hydrothermal treatment and characterized by powder and single-crystal X-ray diffraction, infrared spectroscopy, and thermogravimetric analysis. The first material consists of a cationic hexanuclear bismuthate cluster octahedral in geometry and linked by 1,2-ethanedisulfonate molecules. This structure is thermally stable to about 235 degrees C. In the second compound, discrete cationic nonanuclear bismuthate clusters interact electrostatically with trifluoromethanesulfonate anions to pack into a nearly layered assembly. The material undergoes a transformation to Bi(2)O(3) upon loss of the triflate groups at about 385 degrees C. Both materials demonstrate the use of sulfonate groups for the anion-directed assembly of these rare cationic inorganic structures. The application of the 3D octahedral bismuth cluster material toward acidic heterogeneous catalysis is also reported.
Rogow
David L
DL
Department of Chemistry and Biochemistry, University of California, Santa Cruz, 1156 High Street, Santa Cruz, California 95064, USA.
Fei
Honghan
H
Brennan
Daniel P
DP
Ikehata
Mariko
M
Zavalij
Peter Y
PY
Oliver
Allen G
AG
Oliver
Scott R J
SR