4,4′-联吡啶锌(Ⅱ)配合物的合成及其晶体结构

苦味酸锌与44′联吡啶反应得到一种新型配合物Zn44′bpy2H2O2pic2·2H2O44′bpy44′联吡啶pic-苦味酸根并用元素分析、红外光谱等进行表征。X射线单晶衍射结果表明晶体属单斜晶系空间群Cc晶胞参数a=1.43902b=1.14181c=2.29083nmβ=95.081°V=3.7491nm3Z=4该配合物由44′联吡啶与金属配位形成多孔的二维网二维网再由未配位的水分子及苦味酸根离子通过氢键作用沿a轴方向堆积得三维网状结构且未配位的水分子、苦味酸根离子被包合在网络之中展示出一定的包合现象。

强碱性阴离子交换树脂对苦味酸的吸附与解吸性能

研究了强碱性阴离子交换树脂(简称树脂)对苦味酸的吸附与解吸性能,探讨了吸附的热力学和动力学特性以及吸附机理。实验结果表明:树脂对苦味酸的吸附量随吸附温度升高而增大;溶液pH为2.7～12.0时树脂的苦味酸吸附量最大,稳定在120mg/g以上;树脂对苦味酸的等温吸附规律符合Freundlich模型,相关系数大于0.94;树脂对苦味酸的吸附动力学特性可用Lagergren准二级速率方程描述,吸附活化能为23.3kJ/mol;颗粒内扩散是吸附速率的主要控制步骤;苦味酸初始质量浓度越高,达到吸附饱和的时间越短;用含2.0mol/L HNO3和体积分数40%丙酮的混合液作为脱附剂,可完全洗脱树脂上吸附的苦味酸。

Infinite Three-Dimensional Coordination Polymers: Synthesis and Structures of [Cd (4,4'-bpy)_2 (H_2O)_2]_n (pic)_(2n),[Zn (4,4'-bpy)_2 (H_2O)_2]_n(pic)_(2n) (H_2O)_(2n), and [Zn (4,4'-bpy)_2 (H_2O)_2]_n (4,4'-bpy)_n(H_2O)_n (pic)_(2n)

Three Complexes of the formula [Cd (4,4'-bpy)_2 (H_2O)_2]_n. (pic)_(2n) (1) [Zn (4,4'-bpy)_2 (H_2O)]_n (4,4'-bpy)_n(H_2O)_n (pic)-(2n) (2) and [Zn (4,4'-bpy)_2 (H_2O)]_n (4,4'-bpy)_n (pic)-(2n)(H_2O)_n (3) (4.4'-bpy = 4.4'-bipyridine. pic = picric anion ) have been synthesized and characterized by elemental analysis and single-crystal x-ray diffraction. They all have infinite three-dimensional network structure. crystallizing in the monoclinic space group C2/c (1) and Cc (2.3).