网状玻璃碳光谱电化学池的制作及应用

制作了一种以网状玻璃碳为工作电极的光谱电化学池,并介绍了对网状玻璃碳电极的处理方法。选用铁氰化钾-亚铁氰化钾体系,对其式量电位(E°′)、反应电子数(n)和扩散系数(D_R)进行了测定,取得较为满意的结果。     

新型透射式红外光谱电化学池

本文报道一种新型透射式红外光谱电化学池的设计制作。应用盐片加工技术,采用内参比点设置等方法。使该池达到30μm的厚度,且具有十分良好的电化学性能。     

高温红外光谱电化学薄层池的制作与表征

为了拓宽光谱电化学研究范围,开展高温下电化学反应过程,本文研制了一种高温红外光谱电化学薄层池(HTC)。 研制的HTC清洗方便,操作简单,适用于水体系和有机体系。 该HTC可在室温至373 K(根据溶剂沸点,控温精度为±0.5 K)温度范围内使用,具有良好的电化学性能,红外光谱采集谱图清晰信噪比好。 利用铁氰化钾水溶液和对苯醌离子液体溶液的红外光谱电化学行为对HTC进行了表征,得到较满意的结果。     

外反射式微薄层现场显微红外光谱电化学池设计

本报道一种能很好适用于固态分析了现场研究的外反射式微盘电极薄层显微红外光谱电化学池设计。该池使用１００μｍ直径微铂盘工作电极，银盘参比电极和同心环形辅助电极。在ＰＥＧ４００／ＬｉＣＬＯ４体系中，池参数为：薄层厚０．６μｍ，表观薄层电阻１４ｍΩ，充电电容４×１０＾３ｐＦ，时间常数６０ｍｓ，并测得常温下Ｆｅ（ＣＮ）６＾３－／４－的表观扩散系数４×１０＾－７ｃｍ＾２／ｓ，获了良好分辨Ｆｅ（ＣＮ）６＾３     

一种新型的长光程薄层光谱电化学池

1 前言光谱电化学是近年来发展起来的一门新兴学科,是把光谱方法和电化学方法结合起来,可进行现场分析的技术.作者曾用夹心式薄层电解池研究过超常价态Ag(Ⅲ)、Cu(Ⅲ),大分子冠醚配合物电还原反应的机理.对于一般的薄层电解池,由于从薄层正面透光,主要有三点不足:(1)由薄层溶液厚度决定的短光程,使得溶液粒子的检测灵敏度较低;(2)光透电极既需要透光     

电化学原位拉曼光谱的应用及进展

常规电化学研究方法是以电信号为激励和检测手段,它提供的是电化学体系的各种微观信息的总和,难以准确地鉴别复杂体系的各反应物、中间物和产物,并解释电化学反应机理．近年来,由谱学方法（以光为激励和检测手段）与常规电化学方法相结合产生的谱学电化学技术得到迅速...     

邻苯二胺导电聚合物膜的光谱电化学

运用循环伏安法，电化学现场共振拉曼光谱技术和紫外－可见反射光谱技术研究了邻苯二胺导电聚合物（Ｐ－ｏ－ＰＤ）膜在酸性溶液中的氧化还原过程，循环伏安实验结果表明，聚邻苯二胺的氧化还原过程受表面过程控制，并且在该过程中存在的３种稳定的氧化还原态，现场共振拉曼光谱结果证实存在具有不同的结构和稳定性的３种稳定性，并明确指出聚邻苯二胺是一种以吩嗪环为主要结构单元的梯形聚合物，３种状态的Ｐ－ｏ－ＰＤ表现出不同的     

Electrochemical Deposition and Spectroelectrochemical Response of Bromophenol Blue Films on Gold

Bromophenol blue (BPB) was electropolymerized onto a Au substrate. The effects of voltammetric cycle number, BPB concentration, and pH on film thickness, density, optical absorption, and electrochemical susceptibility were evaluated, and favorable deposition conditions were identified. Quantitative measurement of the film mass via quartz crystal microbalance enabled determination of the molar volume and revealed a strong dependence of film density with deposition pH. Finally, electrochemical control of the optical properties of BPB films was demonstrated via in situ spectroelectrochemistry. We believe this is the first demonstration of electropolymerization of pure BPB on Au, and thus the first demonstration of poly(BPB) as an electrochemically switchable optical coating.     

血红蛋白在裸银电极上的光谱电化学研究

光谱电化学作为把光谱技术和电化学方法有机结合起来的一门新技术［１］,已成为将电化学研究提高到分子水平的强有力手段．多种类型及不同用途的光谱电化学池［２］成功地应用于生物分子的电化学及光谱电化学性质研究［３］．我们利用自制的长光程薄层光透光谱电化学池研...     

分枝定界算法用于有机混合物的同时定性定量分析

分枝定界法用于多组分同时定性定量分析，只需解析一份试样测得的数据，即可同时得到待测样品中所含组分的种类、数目及含量，具有简单、快速、准确等优点。此文对分枝定界法在判据应用方面进行了改进，应用四个判据，解决了最佳子集难判断的问题。建立了精蒽中不经分离同时测定蒽、菲和咔唑的方法。     

Substituents Effects to the Electrochemical,and In Situ Spectroelectrochemical Behavior of Metallophthalocyanines: Electrocatalytic Application for Hydrogen Evolution Reaction

This study describes the effects of the number of fluoro substituents to the electrochemical, in situ spectroelectrochemical, and electrocatalytic activities of metallophthalocyanines for the hydrogen evolution reaction. Tuning of the number of fluoro groups shifts the redox processes and affects the aggregation tendencies of the complexes. An in situ electrocolorimetric method was applied to investigate the color of the electrogenerated anionic and cationic forms of the complexes. Cobalt phthalocyanines incorporated into Nafion film on a glassy carbon electrode decreases the overpotential of the working electrode for H⁺ reduction. The number and position of the electron withdrawing substituents and nature of the metal center change the electrocatalytic activities for the hydrogen evolution reaction in aqueous solutions.     

Spectroelectrochemical Reactivities of Novel Polyaniline Nanotube Pesticide Biosensors

Summary: The preparation and characterisation of electrosynthetic polyaniline nanomaterials doped with phenanthrene sulphonic acid (PSA) is being presented. The polymeric nanomaterials prepared include processable poly(o-methoxy aniline) (POMA) and poly(2,5-dimethoxy aniline) (PDMA). Spectroelectrochemical reactivities of the electroactive polymeric nanotube systems as well as the nanobiosensor systems were studied by SEM, FTIR, UV-Vis and Subtractively Normalised Fourier Transformed Infrared Spectroscopy (SNIFTIRS) techniques. Furthermore, cyclic and differential pulse voltammetric studies of the nanomaterials were also performed using platinum or thiol-modulated gold electrodes. The SEM studies confirmed the nanorod morphology of the polyanilines. The heterogeneous rate constant, k_o, for the nanopolymeric material and the diffusion coefficient of electrons, D_e, was calculated and found to be in agreement with values expected for electron hopping along conducting polymer chains. Organophosphate pesticide nanobiosensor devices were prepared by encapsulating acetylcholinesterase (AChE) in the nanopolymeric composite. The biosensor amperometric response to the organophosphate pesticide called diazinon and the carbamate pesticide called carbofuran were studied. The sensor responses to pesticides followed typical electrochemical Michaelis-Menten kinetics.