多金属氧簇阴离子[Mo6O19]2-/PAMAM超分子化合物的制备、表征及性能

采用树状聚酰胺-胺(PAMAM)大分子化合物与同多酸阴离子Mo6O19]2-,基于静电作用合成了同多金属氧酸盐/树型分子超分子化合物。用元素分析、FTIR、UV-V is、TG/DTA、荧光光谱等测试技术分别对样品进行了结构表征及性能测试。并利用其作为电极修饰剂,制得化学体修饰的碳糊电极(CMCPE),用循环伏安法研究了同多金属氧酸盐/树型分子超分子化合物修饰碳糊电极在1 mol/L H2SO4水溶液中的电化学行为。结果表明,该化合物具有良好的荧光性能和可逆光致变色性能;用该化合物修饰的碳糊电极与Mo6O19]N(C4H9)2]2修饰的电极相比,在-0.2~0.2 V范围内多了1对氧化还原峰;当扫描速率低于100 mV/s时,该电极过程为表面控制过程,而当扫描速率高于100 mV/s时,电极过程变为扩散控制过程;且该电极在室温下具有很好的稳定性。

Synthesis, Characterization and Properties of [Mo6O19]2-/PAMAM Supramolecular Compound

A novel supramolecular compound Mo6O19]2-/PAMAM assembled via ionic bonding was synthesized with poly(amide amine)dendrimer(PAMAM) and Mo6O19]2-polyanion.It was characterized by elemental analysis,FTIR,UV-Vis absorption,TG/DTA,fluorescence spectrum.The electrochemical behavior of the carbon paste electrode(CPE) modified by the title compound was studied in 1 mol/L H2SO4 aqueous solution by means of cyclic voltammetry.The results show that the title compound exhibits good fluorescence and reversible photochromism;one more pair of redox peaks was observed in a potential range of-0.2 V to 0.2 V with CPE modified by the title compound compared with the redox peaks of CPE modified by Mo6O19]N(C4H9)2]2;when the scan rate was varied from 20 to 100 mV/s,the redox process of the CPE is surface controlled,however,when the scan rate was varied from 100 to 200 mV/s,the redox process of the CPE is diffusion-controlled;the CPE modified by title compound also exhibits a remarkable electro-chemical stability.