کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1334155 | 979152 | 2005 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: [Zn(H2PO4)4]2− clusters and ∞[Zn2(HPO4)3(H2PO4)2]4− layers in two new zinc phosphates templated by [H2(4-amino-2.2.6.6-tetramethylpiperidine)]2+ cations [Zn(H2PO4)4]2− clusters and ∞[Zn2(HPO4)3(H2PO4)2]4− layers in two new zinc phosphates templated by [H2(4-amino-2.2.6.6-tetramethylpiperidine)]2+ cations](/preview/png/1334155.png)
Two zinc phosphates (ZnPO), [H2(N2C9H20)]·[Zn(H2PO4)4] (I) and [H2(N2C9H20)]2·[Zn2(HPO4)3(H2PO4)2]·H2O (II), are synthesized under hydrothermal conditions using 4-amino-2.2.6.6-tetramethylpiperidine as organic template. I crystallizes in P1¯ space group with a=8.7398(3)Å, b=9.0417(3)Å, c=15.3822(1)Å, α=92.57(1)°α=92.57(1)°, β=89.76(1)°β=89.76(1)°, γ=102.16(2)°γ=102.16(2)°, V=1187.1(1)Å3 and Z=2Z=2. Its structure, refined to R=0.029R=0.029 and Rw=0.076Rw=0.076 for 4279 independent reflections, consists of [Zn(H2PO4)4]2− clusters held together through strong hydrogen bonds to form pseudo-layers between which the doubly protonated amine molecules are inserted. II is monoclinic, C2, with a=27.57(2)Å, b=9.745(5)Å, c=14.08(1)Å, β=103.72(5)°β=103.72(5)°, V=3675(4)Å3 and Z=4Z=4 (R=0.079R=0.079, Rw=0.268Rw=0.268, 2477 independent reflections). The structure of II consists of ∞[Zn2(HPO4)3(H2PO4)2]4− inorganic (2D) layers built up from vertex-sharing [ZnO4] and [(H2/H)PO4] tetrahedra. Organic cations and water molecules ensure the connection between these layers via hydrogen bonds. It is shown that numerous (1D), (2D), e.g., [H2(N2C9H20)]2·[Zn2(HPO4)3(H2PO4)2]·H2O, and (3D) (ZnPO) result from the condensation of the [Zn(H2PO4)4]2− clusters.
[Zn(H2PO4)4]2− cluster in [H2(N2C9H20)]·[Zn(H2PO4)4].Figure optionsDownload as PowerPoint slide
Journal: Journal of Solid State Chemistry - Volume 178, Issue 6, June 2005, Pages 1880–1887