Aluminophosphate Chain-to-Layer Transformation
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- 作者：Scott Oliver ; Alex Kuperman ; Alan Lough ; and Geoffrey A. Ozin
- 刊名：Chemistry of Materials
- 出版年：1996
- 出版时间：September 1996
- 年：1996
- 卷：8
- 期：9
- 页码：2391 - 2398
- 全文大小：852K
- 年卷期：v.8,no.9(September 1996)
- ISSN：1520-5002
文摘
The synthesis and characterization of two novel aluminophosphatematerials, obtainedfrom the same nonaqueous tetraethylene glycol-cyclopentylaminesystem, is reported. Thefirst material,[Al3P5O20H]5-·5[C5H9NH3+],denoted UT-2, has a 1-D chain structure with aP:Al ratio of 5:3, rather than 1:1 as found in the aluminophosphateAlPO4-n molecular sieves.The UT-2 chains are hydrogen-bonded together by terminal phosphategroups and organizedinto a layered structure. The second material,[Al2P3O12H]2-·2[C5H9NH3+],denoted UT-3,has a 2-D layer structure with a P:Al ratio of 3:2. Both materialshave bilayers of charge-balancing cyclopentylammonium cations interdisposed between anionicaluminophosphatesheets. Variable-temperature in situ PXRD establishes a cleansolid-state structuraltransformation, at 200 
C, of UT-2 to UT-3. The discovery ofthis chain-to-layer conversionsuggests a new paradigm for the templated assembly of 1-D chain, 2-Dlayer, and 3-D open-framework aluminophosphates.
C, of UT-2 to UT-3. The discovery ofthis chain-to-layer conversionsuggests a new paradigm for the templated assembly of 1-D chain, 2-Dlayer, and 3-D open-framework aluminophosphates.