铜金属凝胶的制备及其在染料吸附中的应用

Preparation of copper metallogel and its application in dye adsorption

测试了3个希夫碱配体与Cu^(2+)形成金属凝胶的能力,结果发现,吡啶环上邻位取代的DS3能够在DMF/H_(2)O(v∶v=1∶1)中形成金属凝胶,而对位和间位取代的配体(DS1和DS2)不能形成金属凝胶。红外光谱和紫外可见吸收光谱分析结果表明,配体和金属离子之间的配位作用是凝胶形成的主要驱动力。流变学测试表明,DS3-Cu金属凝胶的储能模量和屈服应力与浓度成正相关,并且DS3-Cu干凝胶能够选择性的吸附水中的甲基橙。

The gelation abilities of three Schiff base ligands with Cu^(2+)were tested,and it was found that only the ligand DS3 could form a metallogel in DMF/H_(2)O(v∶v=1∶1).However,both of other two ligands(DS1and DS2)could not form any metallogel.The results of FTIR and UV/Vis measurements demonstrated that the coordination interaction between DS3 and Cu^(2+)was the key driving force in the formation of the metallogel.Rheological studies indicated that the energy storage modulus and the yield stress of DS3-Cu metallogel were affected by the concentration,and DS3-Cu xerogel showed selective adsorption capacity for methyl orange in water.