Key Laboratory of Colloid and Interface Chemistry & Key Laboratory of Special Aggregated Materials, Shandong University, Jinan 250100, China.
Key Laboratory of Colloid and Interface Chemistry & Key Laboratory of Special Aggregated Materials, Shandong University, Jinan 250100, China.
J Colloid Interface Sci. 2018 Jun 1;519:81-87. doi: 10.1016/j.jcis.2018.02.044. Epub 2018 Feb 20.
Self-assembly behavior of polyoxometalates (POMs) is influenced by the functional group linked with polyoxometalates structure. We modified the POMs with organic molecule terpyridine to endow POMs the ability to assemble into nanostructure and control the properties of POMs. An amphiphilic organic-inorganic hybrid compound was prepared through combining the 4'-para-phenylcarboxyl-2,2':6',2''-terpyridine (PPCT) with POM to form the (TBA)POM-PPCT. After cationic exchange, tetrabutylammonium cation (TBA) can be turned into H to produce HPOM-PPCT. HPOM-PPCT showed excellent self-assembly behavior in different solvents. By adjusting the proportion of solvents, different fibers and leaf-like aggregates were obtained, which were determined by SEM and TEM observations. According to the experimental observations, mechanism of the formation of nanostructures was established. The redox properties of POMs can be maintained after the modification with PPCT, which were demonstrated by cyclic voltammetry (CV) measurements. The successful synthesis of these POMs may provide us an opportunity to find more functionalized ramifications of POMs, with self-assembled structures controlled in different solvent, but the interesting properties of these novel POMs can also provide motivation and guidance for the further development of novel functionalized POMs.
多金属氧酸盐（POMs）的自组装行为受与其结构相连的官能团影响。我们用有机分子三吡啶修饰 POMs，赋予 POMs 自组装成纳米结构的能力，并控制 POMs 的性质。通过将 4'-对苯二甲酸基-2,2':6',2''-三吡啶（PPCT）与 POM 结合，制备了一种两亲性有机-无机杂化化合物（TBA）POM-PPCT。经阳离子交换后，四丁基铵阳离子（TBA）可转化为 H，得到 HPOM-PPCT。HPOM-PPCT 在不同溶剂中表现出优异的自组装行为。通过调节溶剂的比例，可以得到不同的纤维和类叶片状聚集体，这是通过 SEM 和 TEM 观察确定的。根据实验观察，建立了纳米结构形成的机制。PPCT 修饰后 POMs 的氧化还原性质得以保持，这通过循环伏安法（CV）测量得到了证明。这些 POMs 的成功合成为我们提供了一个机会，可以找到更多功能化的 POMs 分支，控制不同溶剂中的自组装结构，但这些新型 POMs 的有趣性质也为进一步开发新型功能化 POMs 提供了动力和指导。
