溶液自组装法构筑超分子杂化功能材料

发布时间：2018-10-14 17:01

【摘要】：以Anderson型多金属氧酸盐(POM)为构筑单元,通过共价键的方式将两个胆固醇分子连接到POM两端,制备了一种具有胆固醇-多金属氧酸盐-胆固醇结构的杂化分子,其在本体中通过自组装形成有序的六棱柱状结构。杂化分子的POM核在N,N-二甲基甲酰胺中具有良好的溶解性,而其胆固醇端基在甲苯中具有适当的溶解性。在甲苯体积分数为85.7%的条件下,杂化分子通过POM核与其胆固醇端基溶解性的差异、胆固醇端基之间较强的范德华力和POM核之间较强的相互静电作用力,可以自组装形成不同尺度的有序纤维结构,其相互缠绕最终形成典型的三维网状结构。在纤维结构中,杂化分子通过胆固醇层与POM层相互交替排列,在透射电镜表征中形成了明暗交替的层状精细结构。本研究工作在纳米材料的设计、组装和应用方面具有潜在的应用价值。
[Abstract]:A hybrid molecule with the structure of cholesterol, polyoxometalate and cholesterol was prepared by connecting two cholesterol molecules to the two ends of POM by covalent bonding with Anderson polyoxometalate (POM) as the building unit. It forms an ordered hexagonal columnar structure by self-assembly in the body. The POM nuclei of the hybrid molecules have good solubility in N-dimethylformamide, while their cholesterol terminal groups have a proper solubility in toluene. When the volume fraction of toluene is 85.7%, the hybrid molecules have strong electrostatic interaction between the POM nucleus and its cholesterol terminal group, and the strong van der Waals force between the cholesterol terminal group and the POM nucleus. The ordered fiber structure of different scales can be formed by self-assembly, and the intertwining can form a typical three-dimensional network structure. In the fiber structure, the hybrid molecules are arranged alternately between the cholesterol layer and the POM layer, and the lamellar fine structure is formed by TEM characterization. This work has potential applications in the design, assembly and application of nanomaterials.
【作者单位】：中北大学理学院;
【基金】：中北大学自然科学基金(XJJ2016015)资助项目~~
【分类号】：O641.3;TB34

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