Interfacial processes studied by coupling electrochemistry at the polarised liquid-liquid interface with in situ confocal Raman spectroscopy.
Interfacial processes studied by coupling electrochemistry at the polarised liquid-liquid interface with in situ confocal Raman spectroscopy.
复制标题
通过将极化液-液界面处的电化学与原位共焦拉曼光谱耦合来研究界面过程。
DOI：
10.1039/c4cp03254c
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
A. Walcarius
中科院分区：
文献类型：
--
作者：
L. Poltorak;M. Dossot;Grégoire Herzog;A. Walcarius
用原位拉曼光谱研究了离子转移伏安法控制的两不相容电解质溶液界面过程。在开路电位和不同界面电位差下，记录了5 mM氯化钠水溶液与10 mM双(三苯基磷二烯)四(4-氯苯基)硼酸盐在1，2-二氯乙烷中的界面拉曼光谱。在开路电位下，1，2-二氯乙烷振动模式的拉曼峰清晰可见，有机电解质离子的拉曼峰强度较弱。当施加负的界面电势差时，有机电解液的阳离子峰强度增加，证实了界面电势差引起的转移。电化学辅助生成介孔二氧化硅沉积后，进行了原位共聚焦拉曼光谱研究。介孔二氧化硅的缩合反应受十六烷基三甲基铵(CTA(+))离子转移到含水解硅烷的水相的控制。用共聚焦拉曼光谱原位监测了CTA(+)在界面上的转移，观察到了二氧化硅的形成。
Interfacial processes controlled by ion transfer voltammetry at the interface between two immiscible electrolyte solutions were studied by in situ Raman spectroscopy. Raman spectra of the interface between a 5 mM NaCl aqueous solution and 10 mM bis(triphenyl-phosphoranydieneammonium) tetrakis(4-chlorophenyl)borate in 1,2-dichloroethane were recorded at open circuit potential and at various interfacial potential differences. At open-circuit potential, Raman peaks assigned to vibrational modes of 1,2-dichloroethane are clearly visible and peaks of weak intensity are measured for the organic electrolyte ions. When a negative interfacial potential difference is applied, the intensity of the peaks of the cation of the organic electrolyte increases, confirming its transfer induced by the interfacial potential difference applied. The electrochemically assisted generation of mesoporous silica deposits was then followed by in situ confocal Raman spectroscopy. The condensation of mesoporous silica was controlled by the transfer of cetyltrimethylammonium (CTA(+)) ions to an aqueous phase containing hydrolysed silanes. The transfer of CTA(+) at the interface was monitored in situ by confocal Raman spectroscopy, and formation of silica was observed.
影响因子：
4.9
作者：
Booth, Samuel G.;Cowcher, David P.;Dryfe, Robert A. W.
通讯作者：
Dryfe, Robert A. W.