铱配合物的电致化学发光性能研究

结构相关的铱配合物[Ir(ppy)2L1](PF6)和[Ir(ppy)2L2](PF6)(ppy=2-苯基吡啶,LI=4-(2,2'-联吡啶-3-乙炔基)-N-(吡啶-2-亚甲基)-N-(噻吩-3-亚甲基)苯胺,L2=4-(2,2'-联吡-3-乙炔基)-N-二(吡啶-2-亚甲基)-苯胺)都具有优良的电致发光(ECL)性...     

钌配合物的电化学性质及其在电致化学发光中的应用

概述了近年来国内外对钌配合物的研究,主要介绍了它们的电化学性质及其在电致化学发光中的应用。     

新型钌配合物电致化学发光检测铜离子

合成了一种具有咪唑结构的多吡啶钌配合物RuL([Ru(bpy)2(Hidip)](ClO4)2)作为新的电致化学发光(ECL)试剂.通过对核磁共振谱和质谱进行解析,证明合成的配合物即为目标产物,并对其光电性质进行了研究.发现铜离子可以选择性地猝灭RuL-TPrA(三丙胺)体系的ECL信号.基于此建立了一种在水溶液体系下...     

有机金属化合物中二级化学键的理论研究（Ⅲ）：金属原子簇…

应用ＩＣＯＮ８（ＥＨＭＯ）分子轨道方法，讨论了金属原子簇化合物离子「Ｍ３（ＣＯ）９ＣＣＯ」＾２－（Ｍ＝Ｆｅ，Ｒｕ，Ｏｓ」的结构异性及配体在金属原子基平面上的取向，并表明了二级化学键的存在。     

一系列Ru(II)配合物电致化学发光性质的比较研究

比较研究了以C₂O₄^2－为共反应物时5个结构相关的Ru(II)配合物[Ru(bpy)₂L¹]^2＋, [Ru(bpy)₂L²]^2＋, [Ru(bpy)₂L³]^2＋, [Ru(phen)₂L¹]^2＋和[Ru(phen)₂L²]^2＋(其中bpy＝2,2′-联吡啶, phen＝1,10-邻菲啰啉, L¹＝4-羧基苯基咪唑[4,5-f][1,10]邻菲啰啉, L²＝3-羧基-4-羟基苯基咪唑[4,5-f][1,10]邻菲啰啉, L³＝3,4-二羟基苯基咪唑[4,5-f][1,10]邻菲啰啉)的电致化学发光(ECL)性质. 结果表明, 酚羟基的存在能有效地淬灭Ru(II)配合物[Ru(bpy)₂L²]^2＋, [Ru(bpy)₂L³]^2＋和[Ru(phen)₂L²]^2＋的ECL, 其它Ru(II)配合物的ECL量子效率与[Ru(bpy)₃]^2＋相差不大.     

电致化学发光及其在分析化学中的应用

本文概括地叙述了电致化学发光的基本原理、方法特点、实验测量,并综述了近三十年来电致化学发光在分析化学中的应用。     

三脚架结构化合物及其配合物研究进展

本文按三脚架结构化合物中心部分构成的不同。分四类对配体及其配合物的结构,性能进行了介绍。（1）以环为中心的三脚架结构化合物;（2）以氮原子为中心的三脚架结构化合物;（3）以碳原子为中心的三脚架结构化合物;（4）以硼原子及磷原子为中心的三脚架结构化合物。     

电喷雾质谱在金属配合物研究中的应用

综述了电喷雾质谱(ESI-MS)在金属配合物分析中的应用,详细介绍了电喷雾质谱在测定金属配合物的分子量、表征金属配合物的结构、分析金属离子与配体的相互作用及相关机理等方面的研究进展.     

几种新型环金属铱配合物的化学发光

合成了三种新型的杂氮类环金属铱配合物,并研究了配合物在Ce(SO4)2、KMnO4等氧化剂和草酸等还原剂存在下的液相化学发光.半胱氨酸对上述体系的发光具有明显的增强和抑制作用,发光强度的变化值与浓度的对数之间具有良好的线性关系,据此可以建立起半胱氨酸化学发光检测的新方法.     

ADPD电致化学发光法测定稀土元素

本文在自制的ECL-1型电致化学发光仪上,用电致化学发光分析法研究了稀土元素钇(Ⅲ)催化新试剂5-(对-苯胺偶氮)-2,3-二氢-1,4-酞嗪二酮(简称ADPD)的电致化学发光行为。发现Y(Ⅲ)催化ADPD电化学发光具有较好的选择性,实验了23种阳离子,只有Ag~+、Ni~(2+)、La(Ⅲ)、Cu~(2+)、Sc(Ⅲ)等干扰比较严重。本法可望发展为单项测定钇的新方法。     

槐定碱-联吡啶钌电致化学发光的研究

研究了槐定碱在碱性联吡啶钌(Ru(bpy)32 )水溶液(pH 9.0)中电致化学发光行为。在玻碳电极上,槐定碱中的氨基氮于 1.30 V(vs.Ag/AgCl)左右被氧化为氮正自由基离子,该自由基离子与Ru(bpy)32 反应生成激发态的Ru(bpy)32 *而发光。利用原位在线电致化学发光方法,槐定碱的检出限为1.0×10-10g/mL。     

Color‐Tunable Electrogenerated Chemiluminescence of Ruthenium N‐Heterocyclic Carbene Complexes

Ru(II) complexes 1 – 3 bearing various N‐heterocyclic carbene (NHC) ligands were synthesized, and their photophysical, electrochemical, and electrogenerated chemiluminescence (ECL) properties were discussed to evaluate a potential of their use as multicolor ECL labels. Interestingly, they exhibited ECL emission ranging from greenish‐yellow to red both in nonaqueous and mixed aqueous solutions, which might show the potential of the Ru(II) complexes as multicolor ECL labels.     

流动注射电化学发光分析法测定诺氟沙星的研究

基于诺氟沙星对鲁米诺在铂电极上弱的电氧化发光信号的强增敏作用与流动注射技术的结合 ,建立了一种测定诺氟沙星的电化学发光分析新方法。该法测定诺氟沙星的检出限为 4 .0× 10 -6g/L ;线性范围为 1.0× 10 -5～ 0 .2g/L ;相对标准偏差为 1.2 % (n =11)。该法简单、快速、灵敏 ,已成功地用于药物制剂和尿样中诺氟沙星的测定。     

流动注射电化学发光分析法测定间苯三酚

基于间苯三酚对鲁米诺在铂电极上弱的电氧化发光信号的强增敏作用与流动注射技术的结合 ,建立了一种测定间苯三酚的电化学发光新方法。该法测定间苯三酚的检出限为 1.2× 10 - 4g L ;线性范围为 4 .0× 10 - 4～ 4 .0× 10 - 2 g L ;相对标准偏差为 4 .7%。     

CdTe量子点修布电极的阳极电致化学发光

制备了CdTe量子点/Nafion修饰玻碳电极(CdTe QDs/Nafion/GCE),并研究了该修饰电极在中性磷酸盐缓冲溶液(PBS)中的电致化学发光(ECL)行为.结果表明,三丙胺(TPA)作为共反应剂存在时,QDs/Nafion/GCE在中性PBS中可以产生强的阳极电化学发光信号.考察了量子点的用量、Nafion的用量、pH、电解质等条件对ECL的影响.抗坏血酸对QDs/Nafion/GCE的ECL具有抑制作用,且抑制程度与抗坏血酸浓度呈线性关系,为利用电致化学发光法检测抗坏血酸提供了新方法.     

Energy Transfer Electrogenerated Chemiluminescence for the Determination of Sulfite

A simple and novel electrogenerated chemiluminescence (ECL) method for the determination of sulfite has been developed based on the energy transfer ECL process. It was found that a weak ECL signal of sulfite was electrochemically generated on a platinum electrode in neutral aqueous solution. The signal was strongly enhanced by rhodamine B as an energy receptor and further enhanced by the neutral surfactant Tween 80. In 0.10M phosphate buffer solution (pH=7.5) containing 2.0×10^–6gmL^–1 rhodamine B and 0.4% (v/v) Tween 80, the ECL response to the concentration of sulfite at a potential of 0.82V was linear over a range of 1.0×10^–7gmL^–1 to 8.0×10^–6gmL^–1, and the detection limit was 5×10^–8gmL^–1. The relative standard deviation (n=11, 1.0×10^–6gmL^–1) was 3.8%. The proposed method has been successfully applied to the determination of sulfite in pharmaceutical injections and white sugar samples.     

基于离子缔合效应电化学发光分析法测定十二烷基苯磺酸钠

研究发现,丁基罗丹明B与十二烷基苯磺酸钠(SDBS)在0.02mol/LHCl介质中形成的疏水性离子缔合物,可被选择性地萃取到以液体石蜡为粘合剂的碳糊电极表面。当该电极置于0.1mol/LNaOH介质且施加1.3V电解电位时,富集于碳糊电极表面的丁基罗丹明B可被电化学氧化而产生强烈的电化学发光信号,且电化学发光强度与SDBS的浓度成正比。据此,建立了一种选择性好、灵敏度高的测定SDBS的电化学发光新方法。在最佳实验条件下,相对电化学发光强度与SDBS的浓度在2.0×10-6~8.0×10-3g/L范围内呈线性关系,其线性回归方程为ΔIECL=5.1c 44.3,检出限为5.0×10-7g/L,相关系数为0.9983。     

Analysis of Choline in Milk Powder Using Electrogenerated Chemiluminescence Including a Mechanism Study

A novel and simple method for detection of choline in milk powder using electrogenerated chemiluminescence (ECL) without prior separation was developed and its mechanism was studied thoroughly. Choline could not strengthen ECL signals of tris(2,2′-bipyridine)ruthenium(II) (Ru(bpy)3²⁺) to be detected. Heated to its melting point, choline decomposed into two new compounds, trimethylamine and N,N-dimethyl-2-aminoethanol. Both of them were tertiary amines and could act as ECL co-reactants to strengthen the ECL signals of Ru(bpy)3²⁺ sharply. The detection method overcame the defects of the commonly used method based on enzyme procedures and liquid chromatography-mass spectrometric technique.     

Flow Injection Analysis of Histidine with Enhanced Electrogenerated Chemiluminescence of Luminol

Histidine is one of the necessary basic amino acids in biological bases, which often controls the catalytic activity of enzymes and acts in holding the higher structure of proteins. Furthermore, it is also an important ingredient in pharmaceutical preparations used for treatment of hetpatosis and nephropathy. Therefore, the determination of histidine in biological fluids and pharmaceutical preparations is of great importance. Various methods have been proposed for the detection of histidine …     

Electrogenerated Chemiluminescence of Lucigenin in Ethanol Solution at a Polycrystalline Gold Electrode

The electrogenerated chemiluminescence (ECL) behavior of lucigenin in ethanol solution at a polycrystalline gold electrode was studied under conventional cyclic voltammetric conditions. Compared with the ECL of lucigenin in aqueous solution, one cathodic ECL peak (ECL‐1 at ?0.98 V versus SCE) with a shoulder (S₁ at ?0.42 V) and three new anodic ECL peaks (ECL‐2 at ?0.53 V, ECL‐3 at 0.20 V, and ECL‐4 at 0.51 V) were observed, respectively, on the curve of ECL intensity versus potential. The effects of initial potential scan direction, the presence of O₂ or N₂, potential scan ranges, supporting electrolyte and the concentration of lucigenin on these ECL peaks were examined. The electrochemistry of lucigenin in ethanol solution was also studied. The emitter of all ECL peaks was identified as N‐methylacridone (NMA) by analyzing the ECL spectra. The mechanism for these ECL peaks is proposed to be due to the reactions of lucigenin and its redox products such as Luc and DBA with dissolved oxygen or O₂ electrogenerated by the dissolved oxygen at different potentials. The formation of new anodic ECL peaks in ethanol solution is due to longer lifetime of superoxide ions and easier electro‐oxidation of DBA in nonaqueous solution, revealing that the solvent plays an important role in the lucigenin ECL reactions.