8—羟基喹啉—5—磺酸—溴化十六烷基三甲胺荧光光度法测定痕量铊

本文研究了８－羟基喹啉－５－磺酸与铊的荧光反应，在表面活性剂ＣＴＭＡＢ存在下，大大提高了反应的灵敏度，在０￣２．５μｇ／２５ｍｌ范围内Ｔｌ（Ⅲ）量与△Ｆ值呈良好的线性关系，检出下限为６．６４ｎｇ／ｍｌ，其相对标准偏差为２．３４％。本法采用聚氨酯泡沫塑料吸附铊后与其它干扰离子分离，可用于地质试样中铊的测定。     

导数光谱法直接测定混合稀土中的钕和铒：8—羟基喹啉—二乙胺体系

在二乙胺存在下,钕、铒与8-羟基喹啉形成的络合物,能使它们的4f电子跃迁吸收峰明显加强。利用三阶导数光谱消除了铈的干扰,并且提高了方法的灵敏度。导数吸光度与钕、铒的浓度分别在3.0～18μg/ml和4.5～21μg/ml范围呈线性关系,且过原点。它们的检出限(S/N=2)是0.26μgNd/ml和0.50μgEr/ml。方法应用于合成样中钕、铒及实物标样中钕的测定,结果令人满意。     

光度显色剂8-羟基喹啉-5-磺酸的纯化方法

报道了8-羟基喹啉-5-磺酸硅胶干柱层析纯化方法，探讨了固定相、淋洗剂、洗脱剂对产品纯化的影响，确定了以层析硅胶为固定相，以V(正(异)丙醇)：V(氨水)＝2：1为淋洗剂，以蒸馏水为洗脱剂的纯化条件。经过红外光谱和高效液相色谱分析证明，使用本方法可获得纯度大于99％的产品，结果满意。     

8-羟基喹啉-5-磺酸金属络合物的荧光特性及其应用研究

本文报道了8-羟基喹啉-5-磺酸的金属络合物在不同条件下的荧光特性,探讨了使用激光-时间分辨技术,建立镁、铝荧光分析方法的可能性.     

钴-8-羟基喹啉-5-磺酸的荧光光度法的研究及应用

以8-羟基喹啉-5-磺酸测定金属离子的荧光反应已有报道。我们研究了CoH₂O₂-8-羟基喹啉-5-磺酸(H₂QS)体系,钴含量在3.7×10^-7～2.5×10^-5mol/L时,该方法能给出线性响应,试验了多种离子的干扰情况,拟定了植物样品中微量钴的测定方法,初步探讨了反应机理。     

TBP萃淋树脂色谱分离荧光分析法测定岩矿中痕量铟

本文研究了８—羟基喹啉—５—磺酸荧光法测定铟，在增效试剂ＣＴＭＡＢ存在下，提高了反应的灵敏度，铟在４—１２０ｎｇ／ｍＬ范围内与△Ｆ值呈良好的线性关系，检出下限为４ｎｇ／ｍＬ，其相对标准偏差为０．９４％，本法采用ＴＢＰ萃淋树脂色谱法分离和富集干扰后，可用于地质试样中铟的测定。     

Determination of Aluminium with 8-Hydroxyquinoline-5-Sulfonic Acid in Presence of A Cationic Surfactant by First and Second Derivative Synchronous Fluorimetry

Abstract

An analytical method has been developed for the fluorimetric determination of nanogram amounts of aluminium in solution. The method is based on the reaction of aluminium with B-hydroxyquinoli-ne-5-sulfonic acid in presence of hexadeciltrimethylammonium bromide as a surfactant agent. Synchronous scanned first and second derivative fluorimetry has been employed to increase the sensitivity of the method. The influence of reaction variables as well as instrumental parameters is discussed. The interference of various foreign ions has also been examined and in some cases eliminated or reduced by addition of 1, 10-phenanthroline.     

Environmental Status of Cobalt and Its Microdetermination With 7-Nitroso-8-Hydroxyquinoline-5-Sulfonic Acid In Waters,Aquatic Weeds and Animal Tissues

Abstract

A method is presented for the spectrophotometric microdetermination of cobalt (II) in fresh waters, aquatic weeds, and animal tissues employing 7-nitroso-8-hydroxyquinoline-5-sulfonic acid. the method enables direct determination of cobalt (II) in presence of a large number of anions and cations commonly associated with cobalt, and is adequate for determining the metal in the concentration range of 0.001–10 ppm, which is commonly encountered in environmental samples.     

1-(8-氨基喹啉-5-偶氮)-8-羟基-3,6-萘二磺酸的合成及其分析应用

合成了 1 (8 氨基喹啉 5 偶氮 ) 8 羟基 3 ,6 萘二磺酸 (AQHNA) ,其结构经红外光谱和元素分析证实。研究了在十六烷基三甲溴化铵 (CTMAB)存在下 ,试剂与锌的显色反应。pH 5的醋酸 醋酸钠缓冲溶液中 ,AQHNA与锌 (Ⅱ )生成 2∶1的紫色络合物 ,其最大吸收峰位于 5 80nm处 ,摩尔吸光系数为1 2 3× 1 0 5L·mol-1·cm-1。锌含量在 0～ 0 4μg mL范围内符合比尔定律 ,方法用于植物样品中锌的测定 ,结果较好。     

锌与7－（2－羧基－4－溴－苯偶氮）－8－羟基喹啉－5－磺酸的显色反应研究及茶叶中锌的测定

本文研究了新显色剂７－（２－羧基－４－溴－苯偶氮）－８－羟基喹啉－５－磺酸与锌的反应条件，试验结果发现在乳化剂ＯＰ存在下，酒石酸介质中新试剂与锌形成稳定配合物，其最大吸收波长为５００ｎｍ，表观摩尔吸光系数为１．１５×１０￣５Ｌ·ｍｏｌ￣（－１）·ｃｍ￣（－１），Ｚｎ￣（２＋）浓度在０～８μｇ／ｍＬ之间符合比尔定律，方法用于茶叶中微量锌的测定结果满意。     

1-(2-羟基-5-硝基苯基)-重氮氨基偶氮苯与镍的显色反应及其分析应用

合成了新显色剂 1 - ( 2 -羟基 - 5 -硝基苯基 ) -重氮氨基偶氮苯 ( HNPDAAB) ,研究了该试剂与镍的显色反应条件。在 Triton X- 1 0 0存在下 ,镍与试剂生成 1∶ 1型深红色配合物 ,其表观摩尔吸光系数达 1 .5 8× 1 0 5L· mol- 1· cm- 1。 Ni2 + 的浓度在 0～9μg/2 5 m L范围内符合比耳定律。方法已应用于合金中微量镍的测定 ,结果满意     

新试剂5-(对羧基苯偶氮)-8-羟基喹哪啶与铂(Ⅳ)显色反应的研究及应用

合成了新试剂5-(对羧基苯偶氮)-8-羟基喹哪啶(5-CPAHQD),并用分光光度法研究了其与铂(Ⅳ)的显色反应。结果表明,在pH=2.0~3.05的HCl—邻苯二甲酸氢钾缓冲溶液中,在乳化剂OP的存在下,试剂与铂(Ⅳ)形成1∶1的稳定红色络合物。建立了测定铂的光度法新体系,其最大吸收波长λmax=490nm,表观摩尔吸光系数ε=5.80×105L.mol-1.cm-1。铂(Ⅳ)的质量浓度在0.02~0.32μg/mL内符合比尔定律。方法用于测定美国蜂窝废催化剂中的铂,结果与原子吸收法相符,平行测定5次的RSD在0.75%~2.38%之间。     

5-(4-硝基苯偶氮)-8-(4-甲苯磺酰氨基)-喹啉的合成及在钴的测定中的应用研究

首次合成了5-(4-硝基苯偶氮)-8-(4-甲苯磺酰氨基)-喹啉,测量了其酸离解常数。在非离子型表面活性剂存在下,试剂与钴(Ⅱ)在pH9.0～11.2范围内形成配合物,ε_(645)=1.01×10~5L·mol~(-1)cm~(-1),在H_2o_2作用下,于λ_((?)m)/λ_((?)x)=420nm/345nm产生强荧光,建立了一个操作简便快速、灵敏度高、选择性好的荧光分析新方法,线性范围2～32ppb,检测极限0.1ngCo(Ⅱ)/ml,用以测量了维生素B_(12)及生物样品中的痕量钴(Ⅱ)。探讨了H_2O_2对荧光增敏的机理。     

Absorption Spectra of the 4f Electron Transitions of the Nd, Ho and and Er Complexes with 1-Cyclopyropyl-6-fluoro-1,4-dihydro-7- (4-ethyl-1-piperazinyl)-4-oxo-3-quinoline Carboxylic Acid Hydrochloride in the Presence of TX-100

The tripositive rare earth metal ions show comparatively little tendencies to form complexes with a variety of normally powerful coordinating agents due to their peculiar electronic configurations. However, certain chelating groups, notably the β-diketones1,2 and 8-quinolinols3,4, are capable of overcoming this difficulty through the formation of inner complex compounds. 1-Cyclopropyl-6-fluoro-1,4-dihydro-7-(4-ethyl-1-piperazinyl)-4-oxo-3-quinoline carboxylic acid hydrochloride (NN…     

两个4-[(8-羟基-5-喹啉)偶氮]苯磺酸配合物的合成、结构及性质研究

以4-[(8-羟基-5-喹啉)偶氮]苯磺酸(H₂L)为配体,采用溶剂热合成法合成了两个配合物[CuL(en)]·0.5H₂O (1)和[CuL₂][Cu(en)₂]·2H₂O (2)(en=乙二胺),并采用单晶X-射线衍射、红外光谱、元素分析、X-射线粉末衍射和热重分析对其进行表征。化合物1和2通过氢键和π…π相互作用连接形成了三维超分子网格。此外,还研究了两个化合物的荧光性质。     

两个4-[(8-羟基-5-喹啉)偶氮]苯磺酸配合物的合成、结构及性质研究

以4-[(8-羟基-5-喹啉)偶氮]苯磺酸(H₂L)为配体,采用溶剂热合成法合成了两个配合物[CuL(en)]·0.5H₂O (1)和[CuL₂][Cu(en)₂]·2H₂O (2)(en=乙二胺),并采用单晶X-射线衍射、红外光谱、元素分析、X-射线粉末衍射和热重分析对其进行表征。化合物1和2通过氢键和π…π相互作用连接形成了三维超分子网格。此外,还研究了两个化合物的荧光性质。     

Fluorescence Reaction of 5- (p-Methoxyphenylazo)-8-(p-tolylsulfonamido)quinoline with Cobalt(II) and Its Analytical Application

Abstract

5-(p-Methoxyphenylazo)-8-(p-tolylsulfonamido) quinoline(MTAQ) has been synthesized. The product was checked by IR, theroograviae-try, NMR and elemental analysis. A highly sensitive spectrofluorim-etric method has been developed for the determination of cobalt(II) based on the formation of a complex with MTAQ in slightly basic medium aqueous solution and In the presence of nonionic surfactant, tween-80. The complex shows two excitation maxima at 304 nm and 338 nm, its emission maximum is centred at 402 nm. The fluorescence intensity is proportional to cobalt(II) concentration in the range of 0-85 ppb. The method has good selectivity and has been applied to the direct fluorimetric determination of trace cobalt(II) in pig's liver, Dianchi shrimp and celery.     

Application of the Perimeter Model to the Assignment of the Electronic Absorption Spectra of Gold(III) Hexaphyrins with [4n+2] and [4n] π‐Electron Systems

Expanded porphyrins : The electronic excited states of two forms of meso‐hexakis(pentafluorophenyl)‐substituted gold(III) hexaphyrin(1.1.1.1.1.1), such as that depicted, have been investigated by density functional calculations and magnetic circular dichroism spectroscopy to assign their low‐energy excited singlet states.