Synthesis of the Aluminophosphate ICP-1 by Self-Assembly of 1,3-Diphenylguanidine: Insights into Supramolecular Aggregation
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- 作者：Teresa 脕lvaro-Mu帽oz ; Ana B. Pinar ; Dubravka 艩i拧ak ; Joaqu铆n P茅rez-Pariente ; Luis G贸mez-Hortig眉ela
- 刊名：Journal of Physical Chemistry C
- 出版年：2014
- 出版时间：March 6, 2014
- 年：2014
- 卷：118
- 期：9
- 页码：4835-4845
- 全文大小：651K
- 年卷期：v.118,no.9(March 6, 2014)
- ISSN：1932-7455
文摘
1,3-Diphenylguanidine (DPG) has distinguishable polar and apolar groups, aromatic rings that can self-assemble through 蟺鈥撓€ type interactions, and high conformational flexibility. These features make it a potential self-assembling structure-directing agent in the synthesis of hybrid host鈥揼uest aluminophosphates. Computational simulations show that the molecule has a strong tendency to self-assemble in aqueous solution. Large supramolecular organic aggregates are produced, with the hydrophobic aromatic rings located in the center of the aggregates, stabilized by 蟺鈥撓€ type interactions, and the hydrophilic guanidine groups on the external surface in close contact with water molecules. With this organic molecule, a new 1-D AlPO framework material (ICP-1) was formed. Its structure, characterized by a combination of single-crystal and powder diffraction techniques, consists of AlP2O8H chains connected to the polar groups of the organic DPG molecules through a complex H-bonding network. This material has an extremely high organic content, close to that of typical mesoporous materials. However, DPG molecules are part of the ICP-1 network, rather than guest molecules in the pores, so removal of DPG results in a collapse of the structure, limiting its potential applications. Nevertheless, this work demonstrates the potential of using self-assembling organic molecules for producing very open-framework materials.