Synthesis of the First Microporous Aluminum Phosphonate with Organic Groups Covalently Bonded to the Skeleton

Abstract

A hydrothermal procedure is used to prepare the molecular sieve Al2 (CH3PO3)3 (1). This compound has a new three‐dimensional framework, in which one six‐coordinate and two four‐coordinate Al centers are bound to the CH3PO3 units. The channel walls of the micropores of 1 are probably not lined with O atoms but with methyl groups.

Direct Synthesis of Functional Zeolitic Materials

“…However, the first description of full three-dimensional inorganic framework containing organic groups was described by Maeda et al [76]. The authors described the direct hydrothermal synthesis of the AlMepO-β material, which is an aluminophosphate (AlPO) material with methyl groups in its structure.…”

“…Interestingly, Carter et al have shown empirically and by theoretical calculations that AlMepO-α material is thermodynamically more stable than AIMepO-β [80]. Those two materials show high hydrophobic character because of the presence of methyl groups in the channels [76], and consequently, they show unique gas and vapour adsorption properties [82][83][84].…”

Nanowires and Nanoribbons Formed by Methylphosphonic Acid

“…[9][10][11][12][13] Even when focusing on nanomaterials, a widespread number of investigations can be found. [14][15][16][17][18][19] A good example of such studies is the work of Maeda and colleagues, who have synthesized a novel material, aluminum methylphosphonate-AlMePO-via a hydrothermal route using bohemite and methylphosphonic acid (MPA) as precursors.…”

“…10 11 The precise structural determination of two polymorphs of AlMePO and the investigation of some of their physical-chemical properties were fully accomplished in their subsequent works. [10][11][12][13] Although AlMePO single-crystals are not nanometric (their dimensions range between hundreds of micrometers and several millimeters), [10][11][12][13] the presence of one-dimensional organic lined channels with nanometric diameter envision several nano-related applications, such as catalysis and selective transport. [10][11][12][13] In another interesting work, Lewington and co-workers investigated the surface reactivity of aluminum when covered by self-assembled monolayers of phosphonic acids with different alkyl chains.…”

“…[10][11][12][13] Although AlMePO single-crystals are not nanometric (their dimensions range between hundreds of micrometers and several millimeters), [10][11][12][13] the presence of one-dimensional organic lined channels with nanometric diameter envision several nano-related applications, such as catalysis and selective transport. [10][11][12][13] In another interesting work, Lewington and co-workers investigated the surface reactivity of aluminum when covered by self-assembled monolayers of phosphonic acids with different alkyl chains. 6 The samples were prepared by immersion of an Al-coated substrate in an ethanolic solution of these acids and it was found that phosphonic acids with long alkyl chains provided the best stability for the aluminum surface when it was previously immersed for 15 minutes in a MPA solution.…”