Delamination and aromatic amine intercalation of layered aluminophosphate with [Al3P4O16]3- stoichiometry

Chen Wang; Weiming Hua; Yinghong Yue; Zi Gao

doi:10.1016/j.jcis.2004.12.011

Delamination and aromatic amine intercalation of layered aluminophosphate with [Al3P4O16]3- stoichiometry

J Colloid Interface Sci. 2005 May 15;285(2):731-6. doi: 10.1016/j.jcis.2004.12.011.

Authors

Chen Wang¹, Weiming Hua, Yinghong Yue, Zi Gao

Affiliation

¹ Department of Chemistry and Shanghai Key Laboratory of Molecular, Catalysis and Innovative Materials, Fudan University, Shanghai 200433, People's Republic of China.

PMID: 15837492
DOI: 10.1016/j.jcis.2004.12.011

Abstract

The delamination and intercalation of a layered microporous aluminophosphate, [Al3P4O16](3-).3[CH3(CH2)NH3]+ (AlP), with aromatic amine have been carried out and were followed by XRD and SEM measurements. The basicity of the amine plays an important role in this process, as do the dielectric constant of the solution and the amount of amine added. A saturated benzylamine (pKa of 9.34) intercalate of the aluminophosphate are obtained in solutions with dielectric constant of 50-70 and an amine concentration of 10 mmol/g AlP, while no aniline (pKa of 4.60) intercalates are formed under similar conditions. The remarkable effect of basicity of the amine can be explained by a metathetical balanced reaction model, which was proved by the results of the intercalation processes of 4-methylpiridine (pKa = 6.00) and 4-methylimidazole (pKa = 7.55).