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首页> 外文期刊>RSC Advances >Rational design of photo-responsive supramolecular nanostructures based on an azobenzene-derived surfactant-encapsulated polyoxometalate complex
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Rational design of photo-responsive supramolecular nanostructures based on an azobenzene-derived surfactant-encapsulated polyoxometalate complex

机译：基于三唑衍生的表面活性剂包封的聚氧酸盐复合物的光响应超分子纳米结构的合理设计

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摘要

Using an ionic self-assembly (ISA) approach, photo-responsive surfactant-encapsulated polyoxometalate complexes (SECs) were fabricated in water from an original Keggin-type polyoxometalate (POM) and a cationic surfactant containing an azobenzene group, viz. phosphotungstic acid (H-3[PW12O40]) and 4-ethyl-4'-(trimethylaminohexyloxy) azobenzene bromide (ETAB). The driving forces and self-assembly mechanism of the ETAB-POM supramolecular hybrids were investigated by NMR, Fourier transform infrared (FTIR), UV/vis and small angle X-ray scattering (SAXS) characterization methods. Of particular interest is the complex solution which shows an obvious variation upon UV light irradiation. On a macroscale, its turbidity increases obviously, from a clear solution before UV irradiation to a turbid state. The microcosmic structures of the complex change from coral-like structures to dispersive nanospheres. These phenomena can be ascribed to the transformation of ETAB from trans-to cis-isomers after exposure to UV light. Beyond that, a cyclic voltammetric (CV) method was employed to observe the electrochemical properties of SECs. The results obtained in this work will shed light of the SECs' applications in phase separation, heterogeneous catalysis reactions, the detection of environmental pollutants, etc.
机译：使用离子自组装（ISA）方法，从原始Keggin型聚氧酸酯（POM）和含有偶氮苯基，ZIZ的阳离子表面活性剂在水中制造光响应表面活性剂包封的聚氧酸盐配合物（SEC）。磷钨酸（H-3 [PW12O40]）和4-乙基-4' - （三甲基氨基己氧基）偶氮苯（EtaB）。通过NMR，傅立叶变换红外（FTIR），UV / VI和小角度X射线散射（SAXS）表征方法研究了Etab-Pom超分子杂种的驱动力和自组装机理。特别感兴趣的是，在紫外光照射时显示出明显变化的复合溶液。在宏观上，它的浊度明显增加，从紫外线照射到浑浊状态之前，从透明的溶液中增加。复合物的微观结构从珊瑚状结构转化为分散纳米球。在暴露于紫外光之后，这些现象可以归因于Etab从转肌型异构体的转化。除此之外，采用循环伏安（CV）方法观察SEC的电化学性质。在这项工作中获得的结果将在相分离，异质催化反应，环境污染物检测等中阐明SECS应用。

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  • 来源
    《RSC Advances》 |2016年第18期|共6页
  • 作者

    Guo Yongxian; Gong Yanjun; Yu Zhidan; Gao Yanan; Yu Li;

  • 作者单位

    Shandong Univ Minist Educ Key Lab Colloid &

    Interface Chem Jinan 250100 Peoples R China;

    Shandong Univ Minist Educ Key Lab Colloid &

    Interface Chem Jinan 250100 Peoples R China;

    Shandong Univ Sch Life Sci Jinan 250100 Peoples R China;

    Chinese Acad Sci Dalian Inst Chem Phys China Ion Liquid Lab Dalian 116023 Peoples R China;

    Shandong Univ Minist Educ Key Lab Colloid &

    Interface Chem Jinan 250100 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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