An introduction to microporus materials, their individual properties and uses is presented. The rational synthesis of these materials is also discussed in terms of suitable 'building blocks'. The work focuses on the structure, synthesis and reactions of the aluminium chlorophosphate ethanoate tetramer known as ACPE using x-ray diffraction and solution and solid state n.m.r. techniques. The synthesis route of this small structure has been studied and its crystal structure re-determined enabling its complex hydrogen-bonded structure to be fully determined. The ACPE unit has been used as the starting material for the non-templated synthesis of the aluminophosphate AlP04-H3 and also the templated synthesis of AlPO-15, UiO-15 and AlPO-12. Reaction mechanisms for these materials have also been suggested based on the use of the ACPE starting material as a building block. It was shown that certain addition reduced the rate of formation of some of these phases. The structure of the krypton sorbed complex microporous material, chabazite, has been studied. The krypton sites have been determined over a range of temperatures. This has enabled the preferential desorption of krypton atoms from specific sites to be determined for the first time in a microporous material using single diffraction. In addition at 190K, a change in the mode of desorption was seen which was accompanied by an anomalous cell change.
| Identifer | oai:union.ndltd.org:bl.uk/oai:ethos.bl.uk:637576 |
| Date | January 2002 |
| Creators | Cork, Susan |
| Publisher | Keele University |
| Source Sets | Ethos UK |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
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