α—Keggin型（NH4）4HPW10V2O40·2.5H2O水热合成及结构特征研究

报道了α－Ｋｅｇｇｉｎ型（ＮＨ４）４ＨＰＷ１０Ｖ２Ｏ４０·２．５Ｈ２Ｏ的水热合成方法,采用Ｘ－ｒａｙ单晶衍测定了晶体结构。结构分析表明：该晶体属于三斜晶系,空间群为Ｐ１＾－,晶胞参数：α＝１．３２２３（３）ｎｍ,ｂ＝１．３２４３（３）ｎｍ,ｃ＝１．３２５３（３）ｎｍ,α＝７５．９８（３）°,β＝７５．９９（３）°,Ｚ＝２,Ｒ１（ｗＲ２）＝０．０８１２（０．１９８０）。杂多酸阴离子作为一个整体是有序     

室温固相反应制备Keggin结构杂多酸铵盐纳米粒子

纳米材料由于其量子尺寸效应及表面效应而在磁、光、电等方面显示出许多常规粒子所不具有的特性[1] .纳米材料成功应用的实例及潜在应用前景推动了各种纳米粉末的合成及合成方法的发展 [2～ 4 ] .利用低温固相反应制备纳米粒子尚不多见 ,但已有报道 [5,6] .多金属氧酸盐因其独特的结构而具有较高的催化活性、导电性、磁性、光电致变色性以及抗病毒活性 ,因而有着广阔的应用前景 ,这些方面的研究已越来越引起人们的兴趣 [7～ 10 ] .本文采用室温固相反应首次制备了多金属氧酸盐纳米粒子 (NH4 ) 3PMo12 O4 0 · 9H2 O(1 )和 (NH4 ) 3PW12…     

Synthesis of Lanthanide Coordination Polymers with Benzophenone-4,4-dicarboxylate: Effect of Lanthanide Contraction on Structures

Introduction Recently, the coordination polymers based on dicar-boxylic acid have been studied extensively for their importance as promising materials.1-7 So the rational design and synthesis of novel coordination polymers with useful functions attract considerable attention. As well known, the design of extended structure with po-tential applications can be realized by starting with connecting ligands capable of binding metal centers strongly and predictably to afford the structures with expe…