Aluminophosphates prepared using in situ generated tetramethylammonium cations as structure directing agents |
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| Institution: | 1. Department of Chemistry, Panjab University, Chandigarh, India;2. Department of Microbiology, Panjab University, Chandigarh, India;3. Faculty of Chemistry, Wroclaw University, 50-383 Wroclaw, 14 F. Joliot Curie Str., Poland;4. Center for Structural Diffractometry and Department of Chemical and Pharmaceutical Sciences, University of Ferrara, via Fossato di Mortara 17-27, I-44121 Ferrara, Italy;1. College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China;2. Berzelii Centre EXSELENT on Porous Materials and Inorganic and Structural Chemistry, Department of Materials and Environmental Chemistry, Stockholm University, Stockholm 10691, Sweden;3. Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang 621900, China;4. Department of Geology, Mineralogy and Geophysics, Ruhr University Bochum, Bochum D-44780, Germany |
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| Abstract: | A series of aluminophosphates (AlPOs) with open architectures, namely dmdabco]Al2(HPO4)4] (1, dmdabco = N,N-dimethyl-1,4-diazabicyclo2,2,2]octane), tmpip]0.5Al(HPO4)2] (2, tmpip = N,N,N,N-tetramethylpiperazinium) and tmpip]Al6(PO4)6(HPO4)] (3) have been solvothermally synthesized and structurally characterized. The in situ generated templates (dmdabco2+ and tmpip2+) originated from the methylation reactions between methanol solvent and their corresponding aliphatic organic-amine parents: 1,4-diazabicyclo2,2,2]octane (dabco) for 1, 1-methylpiperazine for 2 and 3. Such a characteristic in situ methylation is distinct from conventional Eschweiler–Clarke methylation with excessive formic acid and formaldehyde. Compounds 1 and 2 possess the same infinite inorganic chains, which are further linked by hydrogen bonds to form 3D supramolecular framework. Compound 3 is built from Al6P6 and Al6P8 building units, giving rise to an open architecture with three-dimensional channel system. |
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| Keywords: | Aluminophosphate Crystal structure Solvothermal synthesis |
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