Hydrodynamic Spectroelectrochemical Method and its Application

水动力光谱电化学方法及其应用

• 批准号: 10650806
• 负责人: KOBAYASHI Hiroyuki
• 金额: $ 2.24万
• 依托单位: Chiba University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10650806/
• 关键词: spectroelectrochemical method; forced convection; in situ detection; channel flow cell; sulfonation of p-benzoquinone; kinetics; hydrodynamic spectroelectrochemical method; in situ検出

A new spectroelectrochemical method including forced convection was constructed by setting a channel flow cell possessing a working electrode and a window in the upper and the lower course of the flow, respectively, in a spectrophotometer. The collection efficiency was defined as (absorbance x flow rate)/(current). It was independent on the flow rate in the larger flow-rate region than 100cm/s but became smaller with the increasing distance between the electrode and the light path. This method was applied to determination of sulfonation rate constant of p-benzoquinone. Hydroquinone was electrochemically oxidized to p-zenzoquinone in a sulfite solution, p-bennzoquinone was determined in the light path spectrochemically The pressent method was not disturbed by the presence of sulfite, which makes the anodic oxdation of hydroquinone irrevsible. By analyzing the sulfite concentration dependence of the collection efficiency with digital simulation technique 4.7x10ィイD17ィエD1 MィイD1-1ィエD1 sィイD1-1ィエD1 was obtained as the rate consatant for the sulfonation at pH9.0.

在分光光度计中设置一个通道流动池，在流动的上、下游分别设置一个工作电极和一个窗口，建立了一种新的强制对流光谱电化学方法。收集效率定义为（吸光度X流速）/（电流）。在大于100cm/s的流速范围内，该速率常数与流速无关，但随电极与光路距离的增大而减小，并将该方法应用于对苯醌磺化反应速率常数的测定。在亚硫酸盐溶液中，对苯二酚被电化学氧化为对苯醌，在光路中用光谱化学法测定对苯醌。本方法不受亚硫酸盐的干扰，使对苯二酚的阳极氧化不可逆。通过用数字模拟技术分析亚硫酸盐浓度对收集效率的依赖性，得到4.7 × 10 ↑ [-1] D17 × 10 ↑ [-1] D1 × 10 ↑ [-1] D1 × 10 ↑ [-1] D1 × 10 ↑ [-1] S × 10 ↑ [-1] D1 × 10 ↑ [-1] D1作为在pH 9.0下磺化的速率常数。

项目成果

Kobayashi, Hiroyuki: "Spectroelectrochemical Studies on NィイD11ィエD1-Acyl-N-Phenylhydrazine"Journal of The Society of Photographic Scienece and Technology of Japan. Vol.62, No.1. 50-52 (1999)

小林博之：“N-酰基-N-苯肼的光谱电化学研究”日本摄影科学技术学会杂志第 62 卷，第 50-52 期（1999 年）。

小林裕幸: "N^1-アシル-N-フェニルイドラジンの分光電気化学的研究"日本写真学会誌. 62・1. 50-52 (1999)

小林博之：“N^1-酰基-N-苯肼的光谱电化学研究”日本摄影学会杂志62・1（1999）。

小林裕幸: "N'-アシル-N-フェニルイドラジンの分光電気化学的研究"日本写真学会誌. 62・1. 50-52 (1999)

小林博之：“N-酰基-N-苯肼的光谱电化学研究”日本摄影学会杂志62・1（1999）。