新型1,6-二(1,2,4-三唑-1-基)己烷的Ag(Ⅰ)配合物合成及其对阴离子污染物吸附性能的表征

Synthesis of a novel complex containing 1,6-bis(1,2,4-triazole-1-yl)hexane and Ag(Ⅰ)and its absorption of anion pollutants

为了获得高效去除阴离子污染物的新型金属有机框架材料,首先制备1个具有良好柔韧性的1,2,4-三唑类多齿衍生物功能配体1,6-二(1,2,4-三唑-1-基)己烷(L),在此基础上采用水热合成法制备了1个结构新颖的Ag(Ⅰ)配合物,即{[Ag(H_2O)(L)]·NO_3}n,产率为53%.对该配合物的晶体学结构进行表征,并且使其与Cr_2O_7^(2-)和MnO_4^-发生阴离子交换,考查配合物去除阴离子污染物的性能.研究结果表明,配合物{[Ag(H_2O)(L)]·NO_3}n具有新颖的一维链状结构.吸附2种阴离子后配合物的颜色变深,而对应的阴离子溶液颜色变浅.吸附24 h后Cr_2O_7^(2-)和MnO_4^-浓度分别下降了53%和67%,配合物的NO_3^-离子浓度也出现降低.这一结果证实了该配合物确实能够通过离子交换反应有效捕获溶液中的Cr_2O_7^(2-)和MnO_4^-阴离子污染物.

To obtain a novel metal-organic framework with highly efficient removal ability of anion pollutants, a flexible multi- dentate 1,2,4-tfiazole derivate ligand 1,6-his （ 1,2,4-triazole- 1-yl）hexane （L） was synthesized for preparing a novel silver complex, namely {[Ag（H20 ）（L）]·NO3}n by hydrothermal synthesis, and the yield was 53%. The complex was characterized by single crystal diffraction analysis. Furthermore, to learn its removal ability of anion pollutants, the anion exchange reaction between the complex with Cr2O7^2- and MnO4^- was conducted. The result showed that the complex had a novel one-dimensional chain structure. The color of the complex became dark gradually during the course of its reaction with Cr2O7^2- and MnO4^-, while the colors of the solutions containing Cr2O7^2- and MnO4^- became light. After 24 h, the concentrations of Cr2O7^2- and MnO4^- decreased 53% and 67% respectively, and the amount of NO3^- of the complex decreased as well. These results indicated that the complex can effectively capture the anion pollutants, such as Cr2O7^2- and MnO4^- in water solutions through the anion exchange process indeed.