Synthesis and Structural Characterization of a New Layered Aluminophosphate Intercalated with Triply-Protonated Triethylenetetramine [C6H21N4][Al3P4O16]

✍ Scribed by You-Wei Yao; Srinivasan Natarajan; Jie-Sheng Chen; Wen-Qin Pang

• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 249 KB
• Volume: 146
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1006/jssc.1999.8393

✦ Synopsis

A new layered aluminophosphate [C 6 H 21 N 4 ][Al 3 P 4 O 16 ] has been synthesized solvothermally by using triethylenetetramine (tetam) as the structure-directing agent and ethylene glycol as the solvent. The structure of the compound was solved by singlecrystal X-ray di4raction analysis. [C 6 H 21 N 4 ][Al 3 P 4 O 16 ] crystallizes in the monoclinic space group P2 1 /c with a ‫؍‬ 9.550(1), b ‫؍‬ 24.064(1), c ‫؍‬ 9.601(1) A s , ‫؍‬ 97.99(1)3, V ‫؍‬ 2184.9(1) A s 3 and Z ‫؍‬ 4 (R ‫؍‬ 0.057 and R w ‫؍‬ 0.052), and its structure consists of [Al 3 P 4 O 16 ] 3! macroanionic sheets stacked in an AAAA sequence. As primary building units in the individual sheet, alternating PO 4 with terminal P‫؍‬O and AlO 4 tetrahedra are corner-shared to form elliptical eight-membered rings as well as four-and six-membered rings. The macroanionic sheets are held together through H bonds between the terminal P‫؍‬O groups in the inorganic layers and the N atoms of the tetam molecules, which are triply-protonated.