Improved peroxidase-mimic property: Sustainable, high-efficiency interfacial catalysis with H2O2 on the surface of vesicles of hexavanadate-organic hybrid surfactants
Improved peroxidase-mimic property: Sustainable, high-efficiency interfacial catalysis with H2O2 on the surface of vesicles of hexavanadate-organic hybrid surfactants
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改进的过氧化物酶模拟特性：在六钒酸盐-有机杂化表面活性剂的囊泡表面上使用 H2O2 进行可持续、高效的界面催化
DOI：
10.1007/s12274-017-1746-5
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发表时间：
2018-03-01
期刊：
影响因子：
9.9
通讯作者：
Wei, Yongge
中科院分区：
文献类型：
--
作者：
Chen, Kun;Bayaguud, Aruuhan;Wei, Yongge
一种有效提高金属氧化物杂化物催化活性的新方法涉及用于促进试剂活化的金属氧化物界面的创建。在这里，我们证明了由两个烷基链功能化的六氰酸酯簇形成的双层囊泡是室温下用H2O2氧化3,3 ',5,5 ' -四甲基联苯胺（TMB）的高效催化剂，这是一种广泛使用的模拟生物催化氧化过程中过氧化物酶活性的模型反应。在疏水相互作用的驱动下，双尾六氰酸头两亲体可以自组装成双层囊泡，并产生分离TMB显色底物的疏水结构域。TMB与H2O2的反应发生在亲疏水结构域和疏水结构域的界面上，在这里，试剂也与催化六维酸酯簇接触，与相应的未组装体系进行的反应相比，其效率大约高两倍。此外，组装的囊泡体系对TMB的亲和力与报道的贵金属模拟纳米材料相当，并且具有更高的最大反应速率。
An emerging method for effectively improving the catalytic activity of metal oxide hybrids involves the creation of metal oxide interfaces for facilitating the activation of reagents. Here, we demonstrate that bilayer vesicles formed from a hexavanadate cluster functionalized with two alkyl chains are highly efficient catalysts for the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB) with H2O2 at room temperature, a widely used model reaction mimicking the activity of peroxidase in biological catalytic oxidation processes. Driven by hydrophobic interactions, the double-tailed hexavanadate-headed amphiphiles can self-assemble into bilayer vesicles and create hydrophobic domains that segregate the TMB chromogenic substrate. The reaction of TMB with H2O2 takes place at the interface of the hydrophilic and hydrophobic domains, where the reagents also make contact with the catalytic hexavanadate clusters, and it is approximately two times more efficient compared with the reactions carried out with the corresponding unassembled systems. Moreover, the assembled vesicular system possesses affinity for TMB comparable to that of reported noble metal mimic nanomaterials, as well as a higher maximum reaction rate.