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Observation of Adsorbed Species at an Electrode/Solution Interface by Magneto-Optical Rotation

通过磁光旋转观察电极/溶液界面处的吸附物质

基本信息

批准号：
60470040
负责人：
KIYOKO Takamura
金额：
$ 3.46万
依托单位：
Tokyo College of Pharmacy
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1985
资助国家：
日本
起止时间：
1985 至 1986
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-60470040/
关键词：
Magneto-Optical Rotation Electrode Surface Electrolysis 吸着

项目摘要

The objective of this research is to make a new analytical method for observation of adsorbed species at an electrode/solution interface under magnetic field. A characteristic of this research is to observe in situ the changes in optical properties of adsorbates caused by magnetic field.An apparatus for magneto-optical rotation spectroscopy of the electrode/ solution interface was prepared in 1985. The apparatus was constituted of 1 magnet and sample holder, 2 polarizer and analyzer, 3 photomultiplier, 4 cell compartment, 5 lamp, 6 potentiostat and function generator. Optically transparent thin layer electrode(OTTLE) of carbon cloth was also made for this research.In 1986, the apparatus was used to obtain the magneto-optical spectra of chemical species at the carbon cloth electrode/solution interface during electrolysis of a <NiSO_4> , a <CoCl_2> or a chlorpromazine solution. Optical rotation of carbon cloth OTTLE was observed depending on the magnetic field and the electrode potential during electrolysis of a <NiSO_4> or a <CoCl_2> solution. At 0.6V chlorpromazine was oxidized to produce chlorpromazine cation radical. Optical rotation of the radical is strongly dependent on the strength of the magnetic field.The method is useful in detecting not only adsorbed species at the electrode/ solution interface but also electrode reaction intermediates such as organic radicals.

本研究的目的是建立一种新的分析方法，用于在磁场作用下观察电极/溶液界面上的吸附物种。这项研究的一个特点是原位观察磁场引起的吸附物光学性质的变化。1985年研制了一台电极/溶液界面的磁光旋转光谱装置。该装置由1个磁体和样品架、2个偏振器和分析器、3个光电倍增管、4个电池室、5个灯、6个恒电位仪和函数发生器组成。本文还研制了碳布光学透明薄层电极(OTTLE)。1986年，用该装置测量了电解NiSO_4、CoCl2和氯丙嗪溶液时，碳布电极/溶液界面化学物种的磁光光谱。在电解NiSO4或CoCl2溶液的过程中，观察到碳布的旋光性依赖于磁场和电极电位。在0.6V电压下，氯丙嗪被氧化生成氯丙嗪阳离子自由基。自由基的旋光度强烈依赖于磁场的强度，该方法不仅适用于检测电极/溶液界面的吸附物种，而且还适用于检测电极反应中间产物，如有机自由基。