Huang Tianpei, Xie Zhirong, Wu Qingyin, Yan Wenfu
Department of Chemistry, Zhejiang University, Hangzhou 310027, PR China.
State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun 130012, PR China.
Dalton Trans. 2016 Mar 7;45(9):3958-63. doi: 10.1039/c5dt05055c.
A series of temperature-dependent gel-type ionic liquid compounds have been synthesized from 1-(3-sulfonic group) propyl-3-methyl imidazolium (abbreviated as MIMPS) and three vanadium-substituted heteropoly acids H5SiW11VO40, H5SiMo11VO40 and H7SiW9V3O40. The designed and synthesized gel-type polyoxometalate ionic liquids (POM-ILs) have demonstrated a tendency to exhibit a layered structure. Moreover, they can undergo a phase transformation from a viscous gel-state to a liquid-state below 100 °C, and ionic conductivity up to 10(-3) S cm(-1) was observed at 120 °C. Cyclic voltammetry was carried out to study their electrochemical properties in organic solutions, and it was found that the oxidizability of the three POM-ILs decreases in the order: [MIMPS]7SiW9V3O40 > [MIMPS]5SiMo11VO40 > [MIMPS]5SiW11VO40. This result indicates that the redox behavior can be tuned by changing the chemical composition of the heteropolyanions.
一系列温度依赖性凝胶型离子液体化合物由1-(3-磺酸基)丙基-3-甲基咪唑鎓（简称为MIMPS）与三种钒取代的杂多酸H5SiW11VO40、H5SiMo11VO40和H7SiW9V3O40合成。设计并合成的凝胶型多金属氧酸盐离子液体（POM-ILs）呈现出层状结构的趋势。此外，它们在低于100°C时可从粘性凝胶态转变为液态，在120°C时观察到离子电导率高达10(-3) S cm(-1)。进行循环伏安法研究它们在有机溶液中的电化学性质，发现三种POM-ILs的氧化性按以下顺序降低：[MIMPS]7SiW9V3O40 > [MIMPS]5SiMo11VO40 > [MIMPS]5SiW11VO40。该结果表明氧化还原行为可通过改变杂多阴离子的化学组成来调节。
