钼(Ⅳ)-4-(2-苯并噻唑偶氮)邻苯二酚多元络合物显色体系及其应用于钼(Ⅵ)的测定

pH4．5时，Mo（Ⅵ）与显色剂4-（2-苯并噻唑偶氮）邻苯二酚反应形成带负电荷的稳定紫红色1∶2二元络合物。40％丙酮水溶液中λmax为560nm，表现ε560为6.33X104L·mol-1·cm-1。它可与二苯胍进一步反应形成电中性的稳定紫红色1∶2∶1三元离子缔合络合物。其氯仿萃取液的λmax为546nm，表现ε5460为7．56X104L·mol-1·cm-1。Mo（Ⅵ）含量在0．02～0．72mg／L范围内均遵从比耳定律。建议了两种络合物的结构。三元体系具有更好的选择性。将拟定的分析方法用于合金钢试样中小量或痕量钼的测定，取得了满意的结果。     

2,3,7-三羟基-9-[3,5-二溴-4-(2,4-二羟基)苯偶氮]苯基荧光酮的合成及与锆(Ⅵ)的显色反应

介绍了新试剂2,3,7三羟基-9-[3,5-二溴-4-（2,4二羟基）苯偶氮]苯基荧光酮（DBARPF）的合成。通过元素分析、红外光谱和紫外光谱等方法测试,确定了该试剂的组成和结构。研究了试剂与一些金属离子显色反应的光度性质,建立了光度法测定微量锆（Ⅳ）的新方法。在0．6mol/L盐酸介质中,阳离子表面活性剂CTMAB存在下,锆（Ⅳ）与DBARP形成稳定的1：4水溶性络合物,λmax＝538nm,λ538nm为1．78×105L·mol-1·cm-1。锆（Ⅳ）含量在0～400μg/L范围服从比尔定律。拟定方法用于铝合金样品中微量锆（Ⅳ）的测定,获得满意的结果。     

2-〔2′-(6-溴-苯并噻唑)-偶氮〕-1,8-二羟基萘-3,6-二磺酸的合成及其与钛的显色反应

本文合成了一种新的革并座隆类显色试剂—2－［2′－（6－溴－苯并噻唑）－偶氮］－1，8－二羟基萘－3，6－二磺酸（简称Br－BTCA），并研究了其与钛的显色反应。在CTMAB存在下，钛与试剂形成稳定的络合物，其ε616=1．15×105L·mol－1·cm-1，组成为Ti（Ⅳ）：R：=1：2：钛浓度在0～0．5mg／L范围内符合比尔定律，该方法灵敏度高，选择性好，并用于铝合金及硅铁试样中微量钛的测定     

2-(6-硝基-2-苯并噻唑偶氮)-5-二甲氨基苯甲酸与铜显色反应的研究及应用

本文研究了2-(6-硝基-2-苯并噻唑偶氮)-5-二甲氨基苯甲酸(6-NO_2-BTAMB)与铜的显色反应。结果表明,在pH2.0～4.5的乙醇水溶液中6-NO_2-BTAMB与铜形成一种稳定的蓝绿色络合物,其最大吸收波长位于650nm处,表观摩尔吸收系数为7.75×10~4L·mol~(-1)·cm~(-1),络合物的组成为6-NO_2·BTAMB:Cu=1:1,铜浓度在0～10μg/10ml范围内服从比尔定律。该方法具有良好的选择性和灵敏度。在氟化铵和硫脲存在下,利用差减法,可直接测定含微量镍和钴的镁、铝合金中的铜,结果满意。     

4，6-二甲基-2-巯基嘧啶乙酸·邻菲咯啉双核铜配合物的合成及晶体结构

合成了标题化合物[Cu2（phen）2（C8H9N2O2S）（H2O）（OH）]·（ClO4）2,用元素分析和X射线单晶衍射法对其进行了表征和结构分析．该化合物为单斜晶系,空间群：P2（1）．晶胞参数a=8．2295（7）nm,b=18．0274（15）nm,c=24．5459（19）nm,β=96．240（2）°,V=3620．0（5）nm^2,Z=4,Dc=1．686g／cm^3,Mr=918．64,F（000）=1864,μ（Mo—Kα）=1．452mm^-1,R1=0．1091,ωR2=0．1380．两个铜原子通过来自羟基的氧、水分子和4,6-二甲基-2-巯基嘧啶乙酸根桥连．2个铜原子的配位环境基本相同,都具有5配位扭曲的四方锥构型,Cu…Cu之间的距离为0．30189（8）nm．     

4,5-二甲基-2-噻唑偶氮重氮氨基偶氮苯固相萃取-分光光度法测定银

研究了4,5-二甲基-2-噻唑偶氮重氮氨基偶氮苯(DMTDAA)与银的显色反应,在pH 11．0的硼砂-氢氧化钠缓冲介质中,乳化剂-OP存在下,DMTDAA与银反应生成2:1稳定络合物,该络合物可用Waters XterraTM RP18固相萃取小柱富集,小柱上富集的络合物用乙醇(内含0．01 mol．L-1pH为11．0的四氢吡咯-乙酸缓冲盐)洗脱后用光度法测定,在洗脱剂介质中λmax =518 nm,ε=1．39×105L·mol-1·cm-1。银含量在0．01～2．0 mg·L-1范围内符合比耳定律。方法用于环境水样中银含量的测定,结果的RSD在2．2％～2．8％,回收率在96％～104%。     

新试剂3,3'-二甲基联苯重氮氨基-4-苯基-2-噻唑分光光度法测定废水中微量汞

研究了新试剂 3,3′-二甲基联苯重氮氨基 - 4 -苯基 - 2 -噻唑( DMDPDAPT)在表面活性剂 N-氨代十六烷基吡啶 ( CPC)存在下 ,与汞 ( )显色反应的适宜条件。在 p H7.2～ 9.2范围内 ,汞 ( )与 DMDPDAPT形成2∶ 2紫红色配合物 ,其最大吸收波长为 56 0 nm,配合物的表观摩尔吸光系数ε=9.0 1× 1 0 4L· mol-1· cm-1。汞 ( )浓度在 0～ 1 2μg/2 5m L范围内符合比尔定律。此法已用于废水中微量汞 ( )的测定。     

显色剂2,5-二甲氧基-4-氯苯基重氮氨基偶氮苯的合成及其与镉显色反应的研究

合成了显色剂2,5-二甲氧基-4-氯苯基重氮氨基偶氮苯(DMCDAA),并用元素分析和红外光谱分析证明其分子组成与结构。研究了该试剂与镉(Ⅱ)的显色反应条件。结果表明,在 pH 11．5的硼砂-氢氧化钠缓冲溶液中,表面活性剂Triton X-100存在下,DMCDAA与镉(Ⅱ)形成稳定的组成比为2:1的络合物,λmax=526 nm,ε526=2．1×105L·mol-1·cm-1。镉(Ⅱ)含量在 0-20μg/25 mL内符合比耳定律,回归系数为0．999 6。将方法用于铝合金中镉(Ⅱ)的测定,结果的RSD均小于2．5％,回收率在104％-106％之间。     

新试剂1-(4-安替比林偶氮)-4-氨基-2-萘甲酸与铜显色反应研究

在pH60HAc－NH4Ac缓冲介质中,CTMAB存在下,1－（4-安替比林偶氮）－4氨基一2一萘甲酸（AANA）与铜生成2：1红色络合物,λmax＝540nm,ε=4.06×104L·Lmol-1·cm-1,铜含量在0－30μg/25内符合比尔定律,方法用于食品中铜的测定,结果满意。     

3-邻氯苯基-3-(5,5二甲基-3-羟基-2-环己烯-1-酮-2-基)丙酸乙酯的合成和晶体结构

标题化合物C19H23O4Cl（4）是由邻氯苯甲醛（1）与5，5-二甲基-1，3-环己二酮（2）、2，2-二甲基-1，3-二氧六环-4，6-二酮（3）在乙醇中反应而得。结构通过单晶X-射线衍射分析确定，其晶体属于单斜晶系，空间群晶体结构用直接法解出，使用全矩阵最小二乘法对原子参数进行修正，最后的偏离因子R＝0．034，Rw＝0．042。在晶体结构中存在一个共轭的烯醇结构。单晶X-射线分析表明；平面1（C（1）～C（6）、Cl）和平面2（C（8）～C（10）、C（12）、C（13））之间的两面角为97．11°，原子C（7）呈变形的四面体构型。     

Synthesis and characterization of cerium,thorium, and uranyl complexes with ( E )-4-(4-methoxyphenoxy)-4- oxobut-2-enoic acid

(E)-4-(4-Methoxyphenoxy)-4-oxobut-2-enoic acid and its Ce(IV), Th(IV), and UO₂(II) complexes were synthesized and characterized by MS, elemental analysis, IR, UV, TG-DTA, and NMR. The complexes have composition [CeL₂(OH)₂ · 2H₂O] · H₂O, [ThL₂(OH)₂ · 2H₂O] · H₂O, and [UO₂L₂ · 2H₂O] · H₂O. Molar conductance data confirm that the three complexes are nonelectrolytes. The IR and NMR results show that the carboxylates coordinate to the metal ions bidentate, and the ester carboxylic groups do not take part in coordination. Luminescence spectra of the ligand and complexes in DMSO at room temperature were also studied showing strong luminescence of the metal ions.     

(4S)-4-羧基杂氮硅三环的合成

利用L-N,N-双(β-羟乙基)丝氨酸及L-N,N-双(β-羟乙基)苏氨酸与三乙氧基硅烷或氯烷基三乙氧基硅烷反应合成了具有手性的(4S)-4-羧基杂氮硅三环(1～5),并运用IR、~1HNMR、EI-MS等手段表征了结构。证据显示存在着贯穿笼状结构的N→Si配键。     

Synthesis,Crystal Structure and Anti-tumor Activity of 2-（2-Chloro-4-nitrophenyl）-4- （4-chlorophenyl）-3a,4-diethoxy-2,3,3a, 4-tetrahydrochromeno[3,4-d] [ 1,2,3]diazaphosphole

The title compound 2-（2-chloro-4-nitrophenyl）-4-（4-chlorophenyl）-3a,4- diethoxy- 2,3,3a, 4-tetrahydrochromeno[3,4-d][1,2,3]diazaphosphole 2 （C29H30Cl2N3O7P, Mr = 633.44） was synthesized and its structure was characterized by IR, MS, ^1H NMR, ^13C NMR, ^31p NMR, elemental analysis and single-crystal X-ray diffraction. It crystallizes in triclinic, space group P1^-, a = 9.1549（3）, b = 10.7168（4）, c = 17.6272（6）A, α = 102.9363（12）, β = 90.2713（9）, γ = 117.4265（10）°, V= 1484.41（9）A^3, Z= 2,μ（MoKa） = 0.323, F（000） = 658, Z= 2, De= 1.417 g/cm^3, the final R = 0.0687 and wR = 0.2066 for 4943 observed reflections （I 〉 2σ（I））. X-ray analysis reveals that the diazaphospholine ring is almost planar and the two ethoxy groups bonded on the 3a- and 4-positions are in trans configurations. Its antiproliferative activity was also tested in vitro against four human tumor cell lines.     

Synthesis and Bioactivity of Novel Aminomethyl-2-（1, 2,4-triazol）-4, 4-dimethyl-3-pentanone （ol）

3, 3-Dimethyl-1-(1,2,4-triazol)-2-butanone was treated with aqueous formaldehyde to give an additional product, and subsequent elimination by acetic anhydride yielded 4,4-dimethyl-2-(1,2,4-triazol)-1-penten-3-one. Further addition with substituted amines provideda series of (1,2,4-triazol)-4,4-dimethyl-3-pentanone, which were then reduced by KBH4 to obtaina series of (1,2,4-triazol)-4,4-dimethyl-3-pentanol. Their structures were confirmed by ^1HNMR and elemental analysis. The results of bioassay showed that the title products possess good fungicidal activities.     

Molecular structure and vibrational spectra of 4-, 5-, 6-chloroindole

The molecular geometry, IR intensities, harmonic and anharmonic vibrational frequencies of 4-, 5-, 6-chloroindole in the ground state were calculated by DFT/B3LYP level of theory using the 6-31G (d, p) basis set. To give complete and reasonable vibrational assignments, the normal coordinate analysis has been performed for 4-chloroindole, 5-chloroindole and 6-chloroindole. The effect of position of chloro atom on the molecular properties (electron density, dipole moments and energies) of the indole aromatic system is examined on the basis of calculation data for 4-, 5- and 6-chloroindoles.     

新试剂6-(2,4-二羟基苯基偶氮)-2,3-二氢-1,4酞嗪二酮的电致化学发光研究

本文研究了6-(2,4-二羟基苯基偶氮)-2,3-二氢-1,4酞嗪二酮(新试剂DHDHD)的电致化学发光的条件及产生电化学发光的机理。     

Synthesis, Characterization, Spectroscopic Properties of 2-（4-Dimethylaminophenyl）-5-fluoro-6-（morpholin-4-yl）-1H-benzimidazole and its Interaction with Calf Thymus DNA

Benzimidazole compounds have attracted a renewed interest recently owing to theirpotential applications in high-performance composite materials, electronic chemicals,photosensitive materials, and their special potentials in biological and/or medicinalapplication1,2. Typically, aromatic compounds with near planar structures and contain-ing hydrogen-donor groups or groups, which are capable of being protonated, havespecial interactions with DNA via intercalation, hydrogen-bonding, and so on3.Me…     

Synthesis, Crystal Structure and Fluorescent Properties of 1-（4-（Dimethylamino）benzylidene）- 4-（naphthalen- 1-yl） Thiosemicarbazide

1 INTRODUCTION Recently, for the fluorescent properties, Schiff base has been more and more important and widely studied in density optical memories, nonlinear op- tics (NLO), organic light-emitting diodes (OLED), polymer LED and electrogenerated chemilumines- cence (ECL)[1~5]. Thiosemicarbazones are a kind of Schiff bases with thiourea and good ligands easily chelating with transition metal ions. Although they have been studied extensively for a long time due to their chemical and b…     

3, 6-二取代-均三唑并[3, 4-b]-1, 3, 4-噻二唑的合成

研究了2-苯基-1, 2, 3-三唑-4-羧酸(1)与3-烷基/芳基-4-氨基-5-巯基-1, 2, 4-三唑(2a～o)在POCl~3催化下, 脱水缩合得到15个新的3-烷基/芳基-6-(2'-苯基-1', 2', 3'-三唑-4'-基)均三唑并[3,4-b]-1, 3, 4-噻二唑类化合物(3a～o)。