Reversible Dehydration Behavior Reveals Coordinatively Unsaturated Metal Sites in Microporous Aluminum Phosphonates
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© 2014 American Chemical Society. Incorporation of the same ligand into three different aluminum phenylenediphosphonates (Al(H2O)(O3PC6H4PO3H) (1), Al4(H2O)2(O3PC6H4PO3)3(2), and Al4(H2O)4(O3PC6H4PO3)2.84(OH)0.64(3)) was accomplished by varying the synthetic conditions. The compounds have different sorption properties; however, all exhibit reversible dehydration behavior. The structures of the hydrated and dehydrated phases were determined from powder X-ray diffraction data. Compounds 2 and 3 were found to be microporous, while compound 1 was found to be nonporous. The stability of the dehydrated phase and the resulting porosity was found to be influenced by the change in the structure upon loss of water.
author list (cited authors)
Kinnibrugh, T. L., Bakhmutov, V. I., & Clearfield, A.