UiO66的氨基化修饰及表征

Amination modification and characterization of UiO66

和普通的金属有机框架材料相比,UiO-66的水热稳定性和化学稳定性更加出众。通过一锅法分别制备出UiO-66、UiO-66-NH_(2)、UiO-66-(COOH)_(2)样品,之后对羧基化的产物进行PEI修饰制出UiO-66-(COOH)_(2)-PEI样品。然后将UiO-66-NH_(2)和UiO-66-(COOH)_(2)-PEI材料进行荧光检测,探究氯化铝、氯化锌、氯化钴、氯化铅四种金属盐溶液在相同浓度不同体积下对两种材料荧光强度的不同影响。将制得的样品及其中间产物通过红外光谱法(IR)检测,结果表明氨基化和羧基化修饰的UiO-66系列产物是成功的。根据荧光分光光度计测定结果显示,上述四种金属盐溶液对UiO-66-NH_(2)荧光强度都具有淬灭效应,且金属盐溶液的体积和淬灭效应呈正相关。对UiO-66-(COOH)_(2)-PEI材料荧光强度都具有增强效应,金属盐溶液的体积和增强效应呈正相关。

Compared with common Metal-Organic Framework materials(MOFs),UiO-66 has higher hydrothermal stability and chemical stability.UiO-66,UiO-66-NH_(2) and UiO-66-(COOH)_(2) samples were prepared by one-pot method,and then the carboxylated products were modified by PEI to prepare UiO-66-(COOH)_(2)-PEI samples.The UiO-66-NH_(2) and UiO-66-(COOH)_(2)-PEI samples were subjected to fluorescence detection to determine the fluorescence intensity of the four metal salt solutions,such as aluminum chloride,zinc chloride,cobalt chloride,and lead chloride under the same concentration and different volumes of two samples.The samples and intermediate products were detected by infrared spectroscopy(IR).The results showed that the prepared UiO-66,UiO-66 intermediate and carboxylated UiO-66 product were successful.According to the results of fluorescence spectrophotometer,the above four metal salt solutions could enhance the fluorescence intensity of aminated UiO-66-(COOH)_(2)-PEI,and the volumes of metal salt solution were positively correlated with the enhancement effects.The above four metal salt solutions could quench the fluorescence intensity of UiO-66,and the volumes of metal salt solution were positively correlated with the quenching effects.