含手性膦配体3-MBPA的铂(Ⅱ)配合物的2D NMR研究

利用一维和二维NMR技术,对含有手性膦配体的铂配合物trans-[Pt(3-MBPAH)₂Cl₂](1)和trans-(Pt(3-MBPA)(3-MBPAH)Cl)(2)进行¹H和¹³C NMR谱分析,否定了化合物(2)的结构为trans-[Pt(3-MBPA)₂]的可能,归属了所有的¹H和¹³C NMR谱线,并根据磷和铂及磷与磷的偶合常数确定它们是反式构型.     

有机磷化合物的NMR研究——Ⅱ0,0-二烷基膦酸酯的1H、13C和31PNMR谱

本文报道了21个0,0一二烷基膦酸酯类化合物的¹H、¹³C和³¹P NMR参数。研究和讨论了不等价的二烷基¹H、¹³C化学位移和磷碳偶合常数与立体化学的关系。测定了(CH₃CH₂O)₂P(O)CH(CH₂NO₂)(p-OCH₃C₆H₄)的¹³C自旋一晶格弛豫时间T₁,二乙基¹³C T₁间的差别,说明在类似化合物中,含有化学位移各向异性对弛豫的贡献。     

5,10-二氢磷杂吖嗪衍生物结构的核磁共振波谱表征

用¹H, ¹³C NMR及多种二维核磁共振谱进一步确定了本系列化合物5,10-二氢磷杂吖嗪衍生物的结构,完成了¹H和¹³C NMR 谱峰的全归属,探讨了影响偶合常数大小的因素.     

化合物(Et4N)2[Pd2(mp)2(μ-mpH)2]的NMR研究

采用¹H-¹H COSY,HMQC、HMBC等2D NMR技术对化合物(Et₄N)₂[Pd₂(mp)₂(μ-mpH)₂]进行¹H、¹³C NMR谱数据分析与归属,表明它在DMSO溶液中仍保持原有固体状态的分子结构.     

1-(2-羧基苯基甲酰基)氨基硫脲及其Cu+配合物的NMR研究

利用¹H-¹H COSY,¹H-¹³C HMQC,HMBC等2D NMR技术对一种新的配体1-(2-羧基苯基甲酰基)氨基硫脲(H₃L)进行¹H、¹³C NMR谱数据分析与归属,对于它与Cu⁺离子配位的化合物[Cu₂(H₃L)₂Cl₂](H₂O)₃也作了¹H、¹³C NMR的测定,简单讨论了它的配位行为,粗略确定了它的结构.     

靶向新药吉非替尼的核磁共振波谱研究

应用1D、2D NMR实验技术（¹H NMR、¹³C NMR、DEPT、¹H-¹H COSY、¹H-¹³C HMQC、¹H-¹³C HMBC等）研究了靶向新药吉非替尼的结构,对其1H NMR和¹³C NMR谱峰作了全归属,并讨论了F原子对吉非替尼的¹H、¹³C NMR的影响.     

Lasiodonin Acetonide的NMR数据解析

对lasiodonin acetonide进行了¹H和¹³C NMR检测,参考lasiodonin, maoecrystal T, wikstroemioidin B和rabdocoetsin A的¹H、¹³C NMR数据,通过DEPT和¹H-¹H COSY、HSQC、HMBC等2D NMR技术对该化合物所有的¹H和¹³C NMR信号进行了全归属和详细解析.     

吉士脱酮的1H及13C NMR研究

Gestodene是避孕药物18甲基炔诺酮的衍生物,动物实验表明它的孕激素活性为18甲基炔诺酮的3~5倍.本文采用各种2D NMR技术,包括:¹H-¹H COSY,¹H-¹³C COSY和HMBC等,归属了它的¹H和¹³C的谱线,并得到了有关质子间的偶合常数.     

地塞米松棕榈酸酯的NMR数据解析

参考地塞米松在D₂O中检测的的¹H、¹⁹F NMR数据、棕榈酸的¹H、¹³C NMR标准图谱数据和Lindeman-Adams经验公式,对地塞米松棕榈酸酯进行了¹H和¹³C MNR检测,通过DEPT和¹H-¹H COSY、HMQC、HMBC等2D NMR技术对该化合物所有的¹H和¹³C NMR信号进行了全归属和详细解析.     

二嗪磷的NMR研究

通过¹H , ¹³C及DQF-COSY,¹³C-¹H CO SY, COLOC等NMR技术对作为中等毒性农药二嗪磷的¹H,¹³C NMR谱峰归属作了详尽的研究，以杂化轨道理论阐明了二嗪磷结构中两个乙氧基的化学环境差异及谱峰特征, 并讨论了³¹P对二嗪磷中¹H 及¹³C NMR的影响.     

Theoretical study of two-dimensional COSY experiments for S = 7/2 spins: application to (59)Co in the tetrahedral cluster HFeCo(3)(CO)(11)PPh(2)H

The first investigation and analysis of (59)Co 2D NMR homonuclear chemical shift correlation spectra are reported for the tetrahedral mixed-metal cluster HFeCo(3)(CO)(11)PPh(2)H. For this cluster in solution, the (59)Co 2D COSY and DQF COSY NMR spectra prove the existence of a scalar coupling between (59)Co nuclei. In order to obtain a value of this coupling, the 2D COSY and DQF COSY NMR spectra for a three-spin 7/2 AX(2) system have been simulated by numerical density matrix calculations. The comparison between experimental and theoretical 2D NMR spectra gives a spin-coupling constant |(1)J((59)Co - (59)Co)| = (115 +/- 20) Hz for this cluster. Experimental measurements of T(1) and of the line widths for cobalt 59 as well as theoretical (59)Co 1D NMR spectra are reported and support our findings.     

Theoretical studies and antibacterial activity for Schiff base complexes

New ligand 4‐((2‐Hydroxy1‐naphthyl) methylene amino)‐1.5‐dimethyl‐2‐phenyl‐1H‐pyrazol‐3(2H)‐one (HL) was synthesized from the reaction of 2‐hydroxy‐1‐naphthaldehyde and 4‐aminophenaz one. A complexes of this ligand [VO(II)(HL)(SO₄)], [Pt(IV)(L)Cl₃], [Re(V)(L)Cl₃]Cl, and [M(II)(L)Cl] (M═Pd(II), Ni(II), Cu(II)) were synthesized. The resulted compounds were characterized by IR, NMR (¹H and ¹³C), mass spectrometry, element analysis, and UV‐Vis spectroscopy. Additionally, the spectroscopic studies revealed octahedral geometries for the Re(V), Pt(IV) complexes, and square pyramidal for VO(II), square planar for Pd(II) complex, and tetrahedral for the Ni(II) and Cu(II) complexes. Thermodynamic parameters (ΔE^*, ΔH^*, ΔS^*, ΔG^*, and K) were calculated using from the TGA curve Coats‐Red fern method. Therefore, hyper Chem‐8 program has been used to predict structural geometries of compounds in the gas phase. Finally, the synthesized Schiff base and its metal complexes were screened for their biological activity against bacterial species, 2 Gram‐positive bacteria (Bacillus subtilis and Staphylococcus aureus) and 2 Gram‐negative bacteria (Escherichia coli and Pseudomonas aeruginosa).     

3hJ coupling between C(alpha) and H(N) across hydrogen bonds in proteins

J couplings between (13)C(alpha) and (1)H(N) across hydrogen bonds in proteins are reported for the first time, and a two- or three-dimensional NMR technique for their measurement is presented. The technique exploits the TROSY effect, i.e., the degree of interference between dipolar and chemical shift anisotropy relaxation mechanisms, for sensitivity enhancement. The 2D or 3D spectra exhibit E.COSY patterns where the splittings in the (13)CO and (1)H(N) dimensions are (1)J((13)C(alpha), (13)CO) and the desired (3h)J((13)C(alpha), (1)H(N)), respectively. A demonstration of the new method is shown for the (15)N,(13)C-labeled protein chymotrypsin inhibitor 2 where 17 (3h)J((13)C(alpha), (1)H(N)) coupling constants ranging from 0 to 1.4 Hz where identified and all of positive sign.     

稀土配合物RE(TPTZ)Cl_3的合成、表征及荧光性能研究

首次以2,4,6-三吡啶基三嗪（TPTZ）与Sm, Eu, Tb和Dy氯化物反应,合成四种单一稀土配合物以及Tb分别1∶1掺Gd, Y, La的三种异核配合物。经元素分析、稀土络合滴定、摩尔电导率、红外光谱、紫外光谱和差热-热重测定表明,配合物的组成分别为RE（TPTZ）Cl3·3H2O（RE=Sm, Eu, Tb, Dy）和Tb0.5Ln0.5（TPTZ）Cl3·3H2O（Ln=Gd, Y, La）;TPTZ作为三齿配体与稀土离子配位,即中心环提供一个N原子,两个吡啶环分别提供一个N原子;配合物中3个水分子与稀土离子配位,1个Cl-在外界,2个在内界,为1∶1型电解质;配合物内外界可能为[RE（TPTZ）（H2O）3Cl2] Cl,稀土离子的配位数为8。配合物的荧光光谱测试表明,四种单一稀土配合物中,Tb配合物发光最强;三种1∶1掺杂异核Tb配合物荧光强度大于纯Tb配合物,表明Y3＋, La3＋和Gd3＋都可以敏化Tb3＋的发光,其中Gd3＋的敏化作用最强,Y3＋次之,La3＋最差。     

Degradation of azo dye Acid black 1 using low concentration iron of Fenton process facilitated by ultrasonic irradiation

A combination of ultrasonic and low concentration iron (<3 mgL(-1)) of Fenton process (US/Fenton) has been used to treat wastewater containing Acid black 1 (AB1). The results show that the oxidation power of low concentration iron of Fenton could be significantly enhanced by ultrasonic irradiation. The degradation of AB1 in aqueous solution by US/Fenton can receive better results compared with either Fenton oxidation or ultrasonic alone. Many operational parameters, such as ultrasonic power density, the pH value, the Fe(2+) dosage, the H(2)O(2) dosage, AB1 concentration and the temperature, affecting the degradation efficiency were investigated. Also, the effects of various inorganic anions (such as Cl(-), NO(3)(-), CO(3)(2-), etc.) on the oxidation efficiency of US/Fenton were studied. Under the given test conditions, 98.83% degradation efficiency was achieved after 30 min reaction by US/Fenton. The effect of various inorganic anions was in the following decreasing order: SO(3)(2-)>CH(3)COO(-)>Cl(-)>CO(3)(2-)>HCO(3)(-)>SO(4)(2-)>NO(3)(-). The results show that the US/Fenton can be an effective technology for the treatment of organic dyes in wastewater.     

大戟属植物中二萜酯和倍半萜甙结构的2D NMR研究

从阿勒颇侧大戟和巨枝大戟全草中分别得到的一个巨大戟烷型二萜酯和一个倍半萜甙，利用1H－1HCOSY；HMQC，RMBC等2DNMR技术归属了所有质子和碳的化学位移信号，并准确指定了二萜酯中每个酯基以及倍半萜甙中糖的连接位置．     

Solid state multinuclear NMR study of sigma-acetylide complexes of platinum, trans-[ClPt(PnBu3)2-C=C-p-C6H4-C=C-Pt(PnBu3)2Cl] and trans-[-Pt(PnBu3)2-C=C-p-C6H4-C=C-]n.

Solid state 13C, 31P and 195Pt NMR has been employed to study the electronic and geometric structure of the dimeric and polymeric sigma-acetylide complexes of platinum, trans-[ClPt(PnBu3)2-C identical to C-p-C6H4-C identical to C-Pt(PnBu3)2Cl] and trans-[-Pt(PnBu3)2-C identical to C-p-C6H4-C identical to C-]n. The 195Pt shielding tensor has been measured and analysed to reveal details about the electronic properties of the Pt-ligand bonds.     

高碳糖希夫碱的1H NMR和13C NMR全归属

对7个高碳糖希夫碱进行了¹H和¹³C NMR检测，通过DEPT和¹H-¹H COSY，HMQC，HMBC等2D NMR 技术对其¹H和¹³C NMR数据进行了全归属和较详细的解析，并指出其NMR特征.     

棉毛橐吾根茎中3个黄酮类化合物的NMR研究

从棉毛橐吾（Ligularia vellerea）根茎中分离得到2个查尔酮和1个黄酮类化合物：3,2′, 4′-三羟基-4-甲氧基-查尔酮（1）、4,2′,4′-三羟基-查尔酮（2）和7,3′-二羟基 4′-甲氧基黄酮（3）. 应用1D和2D NMR(包括¹H-¹H COSY、HSQC和 HMBC)对这3种化合物的结构进行了分析,确认了化合物1和3中甲氧基和羟基及化合物2中羟基的连接位置,并对它们的¹H和¹³C的化学位移进行了全归属. 