多金属氧簇阴离子[Mo_6O_(19)]^(2-)/PAMAM超分子化合物的制备、表征及性能  

Synthesis,Characterization and Properties of [Mo_6O_(19)]^(2-)/PAMAM Supramolecular Compound

作　　者：刘春莲[1] 林深[1] 连锦明[1] 张晓凤[1] 王芸[1] 

机构地区：[1]福建师范大学化学与材料学院,福州350007

出　　处：《应用化学》2007年第6期632-637,共6页Chinese Journal of Applied Chemistry

基　　金：国家教育部科技计划项目(205078);福建省教育厅A类重点项目(JA04167);福建省自然科学基金资助项目(E0510012)

摘　　要：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。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 HE SO4 aqueous solution by means of cyclic vohammetry. 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 electrochemical stability.

关 键 词：聚酰胺-胺树型分子 多金属氧酸盐 超分子 荧光 光致变色 电化学 

分 类 号：O614.6[理学—无机化学]