Abstract
Abstract A layered derivative of γ-zirconium phosphate containing benzo-15-crown-5 groups covalently attached to inorganic layers has been prepared by replacement of the interlayer dihydrogen phosphate groups of the above layered compound, partially in F− form, by a topotactic reaction in water-acetone solution at 80°C with 4-dihydroxyphosphorylbenzo-15-crown-5. According to the degree of the topotactic replacement, two different phases with interlayer distances 15.7 – 16.7 A and 26.3 – 27.1 A, and approximate percentages of replacement 5% – 22% and 45% – 69%, respectively, were obtained. A computer structural model of the phase with the ideal topotactic replacement of 50% was derived. Although it is too early to predict any practical uses of this derivative, the demonstration that crown ethers can be covalently attached to the inorganic layers of γ-zirconium phosphate opens new prospects in the heterogenization of crown ethers in the surface and interlayer regions of layered solids.
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