Organized Nanostructured Complexes of Polyoxometalates and Surfactants that Exhibit Photoluminescence and Electrochromism
Organized Nanostructured Complexes of Polyoxometalates and Surfactants that Exhibit Photoluminescence and Electrochromism
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DOI：
10.1002/adfm.200801409
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发表时间：
2009-02
影响因子：
19
通讯作者：
Tierui Zhang;Shaoqin Liu;D. Kurth;C. Faul
中科院分区：
文献类型：
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作者：
Tierui Zhang;Shaoqin Liu;D. Kurth;C. Faul
采用离子自组装法制备了一种新型的功能纳米结构有机/无机杂化材料，该杂化材料由普赖斯勒型多金属氧酸盐的Eu交换衍生物、[EuP5W30O110]12−和功能有机表面活性剂组成。详细研究了有机表面活性剂对POM阴离子的结构、光致发光、电化学和电致变色性能的影响。所有得到的杂化材料都是两性的，也就是说，同时表现出热致和溶致液晶相行为。对它们的光物理性质的研究表明，不同表面活性剂与聚阴离子的相互作用以不同的方式影响Eu3+的配位环境和位置对称性。有机表面活性剂中的官能团对POMS的电致变色性能和光致发光性能有显著影响。与普通和含吡啶的配合物不同，含二茂铁的配合物没有观察到光致发光和电致变色。这可以从POM阴离子和二茂铁基之间的电荷转移来解释。
A variety of functional nanostructured organic/inorganic hybrid materials from the europium‐exchanged derivative of a Preyssler‐type polyoxometalate (POM), [EuP5W30O110]12−, and functional organic surfactants were prepared by the ionic self‐assembly (ISA) route. The effect of organic surfactants on the structure, photoluminescent, electrochemical and electrochromic properties of the POM anions was investigated in detail. All obtained hybrid materials are amphotropic, i.e., exhibit both thermotropic and lyotropic liquid‐crystalline phase behaviour. Investigations of their photophysical properties have shown that the interactions of the various surfactants with the polyanions influence the coordination environments and site symmetry of Eu3+ in different ways. The functional groups in the organic surfactants significantly influence the electrochromic properties and photoluminescence of POMs. Different from normal and pyridine‐containing complexes, no photoluminescence and no electrochromism were observed from the ferrocene‐containing complexes. This may be explained in view of charge transfer between the POM anion and the ferrocenyl group.