Abstract
AbstractAluminum 1,4‐benzenedicarboxylate Al(OH)[O2CC6H4CO2]⋅ [HO2CC6H4CO2H]0.70 or MIL‐53 as (Al) has been hydrothermally synthesized by heating a mixture of aluminum nitrate, 1,4‐benzenedicarboxylic acid, and water, for three days at 220 °C. Its 3 D framework is built up of infinite trans chains of corner‐sharing AlO4(OH)2 octahedra. The chains are interconnected by the 1,4‐benzenedicarboxylate groups, creating 1 D rhombic‐shaped tunnels. Disordered 1,4‐benzenedicarboxylic acid molecules are trapped inside these tunnels. Their evacuation upon heating, between 275 and 420 °C, leads to a nanoporous open‐framework (MIL‐53 ht (Al) or Al(OH)[O2CC6H4CO2]) with empty pores of diameter 8.5 Å. This solid exhibits a Langmuir surface area of 1590(1) m2 g−1 together with a remarkable thermal stability, since it starts to decompose only at 500 °C. At room temperature, the solid reversibly absorbs water in its tunnels, causing a very large breathing effect and shrinkage of the pores. Analysis of the hydration process by solid‐state NMR (1H, 13C, 27Al) has clearly indicated that the trapped water molecules interact with the carboxylate groups through hydrogen bonds, but do not affect the hydroxyl species bridging the aluminum atoms. The hydrogen bonds between water and the oxygen atoms of the framework are responsible for the contraction of the rhombic channels. The structures of the three forms have been determined by means of powder X‐ray diffraction analysis. Crystal data for MIL‐53 as (Al) are as follows: orthorhombic system, Pnma (no. 62), a = 17.129(2), b = 6.628(1), c = 12.182(1) Å; for MIL‐53 ht (Al), orthorhombic system, Imma (no. 74), a = 6.608(1), b = 16.675(3), c = 12.813(2) Å; for MIL‐53 lt (Al), monoclinic system, Cc (no. 9), a = 19.513(2), b = 7.612(1), c = 6.576(1) Å, β = 104.24(1)°.
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Dates
Type | When |
---|---|
Created | 21 years, 5 months ago (March 19, 2004, 10:59 a.m.) |
Deposited | 1 year, 10 months ago (Oct. 11, 2023, 6:56 p.m.) |
Indexed | 2 hours, 32 minutes ago (Aug. 21, 2025, 1:51 p.m.) |
Issued | 21 years, 5 months ago (March 15, 2004) |
Published | 21 years, 5 months ago (March 15, 2004) |
Published Online | 21 years, 5 months ago (March 15, 2004) |
Published Print | 21 years, 5 months ago (March 19, 2004) |
@article{Loiseau_2004, title={A Rationale for the Large Breathing of the Porous Aluminum Terephthalate (MIL‐53) Upon Hydration}, volume={10}, ISSN={1521-3765}, url={http://dx.doi.org/10.1002/chem.200305413}, DOI={10.1002/chem.200305413}, number={6}, journal={Chemistry – A European Journal}, publisher={Wiley}, author={Loiseau, Thierry and Serre, Christian and Huguenard, Clarisse and Fink, Gerhard and Taulelle, Francis and Henry, Marc and Bataille, Thierry and Férey, Gérard}, year={2004}, month=mar, pages={1373–1382} }