Efficient co-templating roles of amines and amides admixed with alkylammonium s...

• Author(s): Borges, C. ; Ribeiro, M. F. ; Henriques, C. ; Duarte, M. ; Lourenço, J. P. ; Gabelica, Z.
• Date: 2001
• Persistent ID: http://hdl.handle.net/10400.1/1257
• Origin: Sapientia - Universidade do Algarve
• Subject(s): Synthesis; Methylamine
• Document Type: Conference Object
• Language: English

Description

Two different aluminophosphate structures were synthesised in aqueous media using as main template methylamine (MA), directly added, or generated in situ from methylformamide (MF). Both involve novel AlPO4-n topologies that undergo structural transformations upon template removal, yielding above 350°C microporous thermostable materials with interesting properties. Tetraalkylammonium (TEA) cations were used optionally as co-templates along with MA. Only non protonated MA was found incorporated into the pore volume of both structures, in relatively strong interaction with the framework oxygens. TEA appeared to stabilise one of the phases at defined stages of nucleation and/or growth processes, without playing any specific structure-directing role.