卢小泉
博士研究生 教授
西北师范大学 化学化工学院
分析化学;电化学和电分析化学;化学计量学及化学信息学;
暂无
- 姓名:卢小泉
- 目前身份:在职研究人员
- 担任导师情况:
- 学位:
-
学术头衔:
- 职称:高级-教授
-
学科领域:
分析化学
- 研究兴趣:分析化学;电化学和电分析化学;化学计量学及化学信息学;
暂无
-
主页访问
3882
-
关注数
0
-
成果阅读
605
-
成果数
11
【期刊论文】Wavelet frequency spectrum and its application in analyzing an oscillating chemical system
卢小泉, Xiaoquan Lu*, Hongde Liu, Jingwan Kang, Jin Cheng
X. Lu et al./Analytica Chimica Acta 484(2003)201-210,-0001,():
-1年11月30日
Based on the continuous wavelet transform (CWT), three types frequency spectra, wavelet frequency spectrum (WFS), point frequency spectrum (PFS) and time frequency spectrum (TFS), were developed. Two data sets were simulated and treated with the proposed spectra, the results indicated that WFS could extract the frequency information, which was like Fourier analysis but more accurate, PFS could obtain the frequency at any moment, TFS could show frequency change with time. These abilities of PFS and TFS were impossible for Fourier analysis. An oscillating chemical signal was processed with WFS and TFS. From the processed results, two points could be learned about the oscillating chemical reaction: one was the oscillating chemical reaction was a mixture one including two or more complex kinetics processes, the velocity of the switch from the reduced state (RS) to the oxidized state (OS) was faster than the reverse switch (from OS to RS); the other was increase of KBrO3 could decrease the velocities of both switches, which led to the oscillating period became longer.
Continuous wavelet transform, Wavelet frequency spectrum, Time frequency spectrum, Oscillating chemical signal
-
38浏览
-
0点赞
-
0收藏
-
0分享
-
711下载
-
0评论
-
引用
卢小泉, Lu Xiaoquan, * Liu Hongde, Xue Zhonghua, and Zhang Qiang
J. Chem. Inf. Comput. Sci. 2004, 44, 1228-1237,-0001,():
-1年11月30日
To estimate the number of peaks and to find the individual peak positions in an overlapped signal, a new method called maximum spectrum of continuous wavelet transform (MSCWT) was developed by extracting the maximum coefficients of continuous wavelet transform (CWT). The peak position in MSCWT was the same as that in its original signal. In this process, CWT was performed not on a single dilation but on an appreciation dilation range. To obtain such a range, a new criterion was introduced to choose a center dilation, which was used to form the dilation range. If Cdilation denoted the center dilation, the proper dilation range was [Cdilation-6 (2, Cdilation+1
-
65浏览
-
0点赞
-
0收藏
-
0分享
-
189下载
-
0评论
-
引用
卢小泉, Xiaoquan Lu, * Lina Hu, Xiaoqiang Wang
,-0001,():
-1年11月30日
An electron transfer reaction between ascorbic acid (H2A) in an aqueous solution and oxidizing agent in an organic solution immiscible with water has been studied by thin-layer cyclic voltammetry (TLCV) for charge transfer at the interface between two immiscible electrolyte solutions (ITIES). As an antioxidant, H2A provide electrons through the aqueous/organic interface to reduce Fc
Thin-layer cyclic voltammetry,, Scanning electrochemical microscopy,, Antioxidant activity,, Ascorbic acid
-
75浏览
-
0点赞
-
0收藏
-
0分享
-
382下载
-
0评论
-
引用
【期刊论文】Voltammetric studies of the interaction of transition-metal complexes with DNA
卢小泉, Xiaoquan Lu*, Kaimei Zhu, Min Zhang, Hongde Liu, Jingwan Kang
Lu et al./J. Biochem. Biophys. Methods 52(2002)189-200,-0001,():
-1年11月30日
The interaction of the two new synthesized transition-metal complexes, ML2 (M=Co, Cu, L= 1, 8-dihydroxyethyl-1, 3, 8, 10, 13-hexa-azacyclotetradecane) with calf thymus DNA was probed by cyclic voltammetry (CV) and differential pulse voltammetry (DPV). Adding deoxyribonucleicacid (DNA) into [CoL]2+ and [CuL]2+ solution, the ip value of all the peaks of [CoL]2+ and [CuL]2+ significantly decreased in proportion to concentration of DNA. Glassy carbon electrodes (GCEs) were modified with DNA by adsorption, and it was electrochemically characterized with transition-metal complexes, [ML]2+. The DNA modification layer on the GCE is unstable to alkali and to heat, but stable to acid solutions and very stable in long stock in a dry state. It could be seen that peak potential shifted positively and the peak current increased significantly. The electrochemical parameters, binding constant (kn+) and binding sites(s) were calculated by a nonlinear regression method.
Transition-metal complex, DNA, Intercalation, Voltammetry
-
35浏览
-
0点赞
-
0收藏
-
0分享
-
705下载
-
0评论
-
引用
卢小泉, Xiaoquan Lu*, Min Zhang, Jingwan Kang, Xiaoqiang Wang, Lin Zhuo, Hongde Liu
X. Lu et al./Journal of Inorganic Biochemistry 98(2004)582-588,-0001,():
-1年11月30日
The electrochemical characteristics of kanamycin onto self-assembled monolayer (SAM) modified gold electrode (SAM/Au) is investigated by cyclic voltammetry. In the potential range 0-0.6 V, Cu (II) yields a pair of stable redox waves at the bare gold electrode. Epa is located at 0.189 V and Epc at 0.254 V. In contrast, Cu (II) is reduced at a more positive potential and a decreasing current at the kanamycin SAM/Au electrode. Cu (II) and kanamycin can form a stoichiometry complex with chemical ratio of 2:1. The interaction of Cu(II)-kanamycin complex with calf thymus DNA is also studied in the solution. And the interactive mode between Cu (II)-kanamycin complex and DNA is verified by the fluorescence method. Binding constants (K) of the Cu (II)-kanamycin complex to DNA and binding site size (s) are calculated from voltammetric data and equal to 1.5×10-7 l/mol and 4 bp, respectively.
Self-assembled monolayer, Cu (, II), -kanamycin complex, Calf thymus DNA, Intercalation mode, Fluorescence method
-
85浏览
-
0点赞
-
0收藏
-
0分享
-
239下载
-
0评论
-
引用
卢小泉, Xiaoquan Lu*, Jun Jin, Jingwan Kang, Baoqiang Lv, Hongde Liu, Zaixin Geng
X. Lu et al./Materials Chemistry and Physics 77(2002)952-957,-0001,():
-1年11月30日
Agold electrode modified by 5-{[4-(4-mercapto) phenylmethoxy] phenyl}-10, 15, 20-tris (phenyl) porphyrin cobalt (II) (MPPTPCo (II)) has been prepared. The properties of the modified electrode were investigated by scanning electronic microscopy (SEM) and X-ray photoelectron spectroscopy (XPS) as well as electrochemical methods. The MPPTPCo (II)-SAM (SAM: self-assembled monolayer) modified electrode could successfully be used for the electrocatalytic oxidation of ascorbic acid (AA). The catalytic currents increased linearly with AA concentration in the range of 1.2×10−8-3.9×10−5 mol l−1 with the correlation coefficient of 0.9944. The detection limit was 2.6×10−9 mol l−1 with 10 min accumulation.
MPPTPCo (, II), , SAM, Electrocatalytic oxidation
-
41浏览
-
0点赞
-
0收藏
-
0分享
-
120下载
-
0评论
-
引用
卢小泉, Xiaoquan Lu*, Baoqiang Lv, Zhonghua Xue, Minrui Li, Limin Zhang, Jingwan Kang
X. Lu et al./Thin Solid Films 488(2005)230-235,-0001,():
-1年11月30日
A novel thiol-derivative porphyrin (5-[p-(mercaptopropyloxy)-phenyl]-10, 15, 20-triphenylporphine shortly as H2MPTPP) and its cobalt (II) complex (MPTPPCo (II)) have been successfully immobilized on gold surface by self-assembly technique. The surface coverages (C) of MPTPPCo (II) was calculated to be 4.86
Voltametry, Electrochatalysis, Thiol-derivatized porphyrin, Atomic for microscopy
-
31浏览
-
0点赞
-
0收藏
-
0分享
-
295下载
-
0评论
-
引用
【期刊论文】4-巯基吡啶自组装修饰金电极的电化学性质及对抗坏血酸的测定
卢小泉, Lu Xiaoquan*, L
分析化学,2003,31(6)686-688,-0001,():
-1年11月30日
研究了4-巯基吡啶自组装膜(SAM)修饰金电极的制备及其电化学性质,并用于抗坏血酸(AA)的测定。在pH3.0盐酸2邻苯二甲酸氢钾缓冲溶液中,AA在SAM修饰金电极上产生一灵敏的氧化峰,峰电流与AA浓度在4.0×10-6~1.0×10-3molPL范围内呈良好的线性关系,检出限为2.7×10-6molPL,相关系数为019978。该电极对多巴胺(DA)有排斥作用,重现性良好,可用于AA的灵敏测定。
自组装膜,, 4-巯基吡啶,, 抗坏血酸,, 化学修饰电极,, 电催化氧化
-
84浏览
-
0点赞
-
0收藏
-
0分享
-
198下载
-
0评论
-
引用
卢小泉, Lu Xiaoquan*, Mo Jinyuan, Kang Jingwan, Gao Jinzhang
分析化学,1998,26(5):597-602,-0001,():
-1年11月30日
评述了数字信号处理方法在电分析化学中进展,着重介绍了这些方法的基本原理及其在电分析化学中的应用。
电分析化学,, 数字信号处理,, 化学计量学,, 评述
-
45浏览
-
0点赞
-
0收藏
-
0分享
-
119下载
-
0评论
-
引用
卢小泉, Xiaoquan Lu *, Jingwan Kang, Jinzhang Gao
X. Lu et al./Analytica Chimica Acta 405(2000)161-165,-0001,():
-1年11月30日
The transfer of tetramethyl-p-phenyle-diamine (TPD) across the water/nitrobenzene interface was investigated by cyclic voltammetry. The transfer mechanism of TPD is derived from its electrochemical behavior. The effect of pH on the transfer behavior was discussed in detail. The standard interfacial potential difference ΔοWψO, and standard Gibbs energies, ΔοWψO of TPD were calculated. The transfer process was also supported by differential pulse and convolution voltammetry, and visible spectroscopic studies. The linear relationship between peak current ip and concentration of TPD demonstrates the potential for analysis of TPD.
TPD, Water/, nitrobenzene interface, Voltammetry
-
68浏览
-
0点赞
-
0收藏
-
0分享
-
122下载
-
0评论
-
引用