Synthesis and Characterization of Layered Zinc Biphenylylenebis(phosphonate) and Three Mixed-Component Arylenebis(phosphonate)/Phosphates

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• 作者：Baolong Zhang ; Damodara M. Poojary ; and Abraham Clearfield
• 刊名：Inorganic Chemistry
• 出版年：1998
• 出版时间：April 20, 1998
• 年：1998
• 卷：37
• 期：8
• 页码：1844 - 1852
• 全文大小：387K
• 年卷期：v.37,no.8(April 20, 1998)
• ISSN：1520-510X

文摘

Layered zinc 4,4'-biphenylylenebis(phosphonate),Zn₂(O₃PC₁₂H₈PO₃)·2H₂O(I), has been synthesized and itsstructure solved and refined by using X-ray powder diffraction data.The compound crystallizes in the spacegroup Pnn2 with a = 27.904(1) Å, b= 4.8273(3) Å, c = 5.6450(2) Å, and Z= 2. The zinc atoms in thiscompound have distorted octahedral geometry. The phosphonateoxygens bind to zinc through chelation andbridging similar to those found in zinc phenylphosphonate and zincphenylenebis(phosphonate) reported earlier.The water oxygen atom occupies the sixth coordination site.This paper also reports three mixed zincarylenebis(phosphonate)/phosphate compounds,Zn₂(O₃PC₆H₄PO₃)_0.75(HPO₄)_0.5·2.5H₂O(II),Zn₂(O₃PC₁₂H₈PO₃)_0.75(HPO₄)_0.5·2.5H₂O(III), andZn(HO₃PC₁₂H₈PO₃H)_0.82(HPO₄)_0.18(IV). Their structures were characterized byX-raydiffraction, IR spectroscopy, solid state ³¹P NMRspectroscopy, and TGA. It was found that the structuresofcompounds II and III are similar to those oftheir corresponding parent phosphonates but compound IVcontainsa different type of metal-phosphonate framework. BETmeasurements show that the surface areas of thesephosphonates have been largely increased after introducing phosphategroups, mainly however due to mesoporosity.