Efficient co-templating roles of amines and amides admixed with alkylammonium salts for the stabilisation of new AlPO4-n topologies

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...

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Bibliographic Details
Main Author: Borges, C. (author)
Other Authors: Ribeiro, M. F. (author), Henriques, C. (author), Duarte, M. (author), Lourenço, J. P. (author), Gabelica, Z. (author)
Format: conferenceObject
Language:eng
Published: 2012
Subjects:
Synthesis
Methylamine
Online Access:http://hdl.handle.net/10400.1/1257
Country:Portugal
Oai:oai:sapientia.ualg.pt:10400.1/1257
Description
Summary: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.

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