Exploring the pH dependence of viologen reduction by α-carbon radicals derived from Hcy and Cys
作者:Dong Wang、William E. Crowe、Robert M. Strongin、Martha Sibrian-Vazquez
DOI:10.1039/b819746f
日期:——
The colorimetric reaction of homocysteine (HCy) with a series of viologen salts suggests a linear correlation between the mid-point reduction potential of Hcy-derived α-carbon radicals and pH.
Design of switchable wettability sensor for paraquat based on clicking calix[4]arene
作者:Guifen Zhang、Xiaolei Zhu、Fajun Miao、Demei Tian、Haibing Li
DOI:10.1039/c2ob00018k
日期:——
A calix[4]arene acetylene (C4AE)-modified gold surface is successfully constructed in situ via click chemistry. The functionalized surface is used for selective recognition of paraquat by a wettabilityswitch. Impedance measurements showed that the surface also expresses recognition for paraquat with a high sensitivity of 10 pM. The recognition mode, based on host–guest inclusion, is studied by computational
The Oxidation-State Dependent Structural Conformation and Supramolecular Function of a Redox-Active [2]Rotaxane in Solution
作者:Kirill Nikitin、Donald Fitzmaurice
DOI:10.1021/ja050694h
日期:2005.6.1
A new NMR technique, namely paramagnetic suppression spectroscopy (PASSY), has been used to study the oxidation-state dependent structural conformation and supramolecular function of redox-active rotaxanes and catenanes in solution and at the surfaces of nanoparticles. Specifically, this technique has been used to study the structural conformation and supramolecular function in solution of a redox-active [2]rotaxane and the corresponding radical cation formed by a one-electron reduction. The findings of this and related studies provide important insights into the design of nanoscale devices based on rotaxanes and catenanes.
Modifying silica with viologenic groups
作者:L. B. Dzaraeva、A. A. Arutyuniantz、A. S. Archegova、A. N. Shpakov
DOI:10.1134/s1070363210050300
日期:2010.5
Modification of silica with viologenic groups is described. N,N'-Diallyl-gamma,gamma'-dipyridinium dibromide obtained by the reaction of allyl bromide with gamma,gamma'-dipyridyl was hydrosilylated with triethoxysilane followed by copolycondensation of the synthesized bis(3-triethoxysilylpropyl)-gamma,gamma'-dipyridinium dibromide with tetraethoxysilane.
Studies of bipyridinium ionic liquids and deep eutectic solvents as electrolytes for electrochromic devices
作者:Noémi Jordão、Hugo Cruz、Fernando Pina、Luís C. Branco
DOI:10.1016/j.electacta.2018.04.179
日期:2018.9
work, two bipyridinium di-cations based on [(allyl)2bpy]2+ and [(C10)2bpy]2+ combined with halogenate (I or Br), bistriflimide ([NTf2]) and dicyanamide [DCA] anions have been prepared and electrochemical characterized. These salts were studied using a conventional electrolyte (TBAP in acetonitrile) and alternative electrolyte based DES (LiTfO:6EG) for 3- and 2- electrodes configuration devices. In the
在这项工作中,基于[(烯丙基)2 bpy] 2+和[(C 10)2 bpy] 2+的两个联吡啶鎓双阳离子与卤化物(I或Br),双铋酰亚胺([NTf 2 ])和双氰胺[已经制备了[DCA]阴离子并对其进行了电化学表征。使用常规电解质(乙腈中的TBAP)和用于3电极和2电极配置设备的基于DES的替代电解质(LiTfO:6EG)对这些盐进行了研究。 在2-构型装置中,[(烯丙基)2 bpy] [DCA] 2和[(C 10)2 bpy] [DCA] 2显示不同的自由基阳离子着色,特别是绿色和蓝色,恢复时间与原始时间不同。在[(C 10)2 bpy] I 2的情况下,与先前的文献一致,分别获得了蓝色和红紫色着色,分别归因于电生成的自由基阳离子和二聚体。通过[[C 10)2 bpy] X 2和[(烯丙基)2 bpy] X 2(X = Br,NTf还已经研究了在2-电极配置装置中具有几个氢键供体的图2(DCA)。基于[(烯丙基)2