Synthesis and characterization of a layered chlorozincophosphate templated by protonated 4-methyl-piperidine by R. Kefi, F. Lefebvre, and C. Ben Nasr

Crystal Research and Technology

Cryst. Res. Technol. 42, 333 (2007) - Abstract -

Synthesis and characterization of a layered chlorozincophosphate templated by protonated 4-methyl-piperidine

R. Kefi, F. Lefebvre*, and C. Ben Nasr

Laboratoire de chimie des Matériaux, Faculté des Sciences de Bizerte, 7021 Zarzouna, Tunisie
*Laboratoire de Chimie Organométallique de Surface (LCOMS), Ecole Supérieure de Chimie Physique Electronique, Villeurbanne Cedex, France

Keywords	X-ray diffraction, layered compounds, NMR spectroscopy, 4-methyl-piperidine, organic template
PACS	61.66.Hq
DOI	10.1002/crat.200610824

A chlorozincophosphate with the composition Zn(HPO₄)Cl^.[C₆H₁₄N] has been synthesised under mild conditions in water medium in presence of 4-methyl-piperidine as organic template. The structure was determinated by single crystal X-ray diffraction. The unit cell is orthorhombic (space group Pcab) with a = 8.743(9), b = 9.592(6), c = 26.573(6) Å, Z = 8 and V = 2228.91(12) Å³. The structure involves a network of ZnO₃Cl and PO₃(OH) tetrahedra forming macroanionic inorganic layers with four and eight-membered rings. Charge balance is achieved by the protonated amine which is trapped in the interlayers space and interacts with the organic framework through hydrogen bonding. Solid state ³¹P and ¹³C MAS-NMR spectroscopies are in full agreement with the X-ray structure.

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