1-芳基-2-丙酮的合成研究

以芳香胺为原料, 经重氮化和改进的Meerwein芳基取代反应, 合成了一系列的1-芳基-2-丙酮, 其中1-(3,5-二三氟甲基苯基)-2-丙酮是一个新化合物. 改进后的方法简化了合成步骤, 提高了收率, 可方便地用于在苯环上具有不同取代基的芳基丙酮的合成.     

(3-氮-吗啉)-1-(4-氯)-苯基-1-丙酮不对称还原产物光学活性的理论计算

采用AM1方法对(S)-4-苄基-5,5-二苯基-1,3,2-噁唑硼烷催化(3-氮-吗啉)-1-(4-氯)-苯基-1-丙酮不对称还原反应的立体控制步骤进行了计算,获得了R和S型过渡态的优化构型及其热焓和熵等热力学参数,计算得到了该步反应中生成R和S型对映体的反应速率常数之比,据此得到的不对称还原反应最终产物的光学活性e.e.的理论计算值,与实验结果相近.     

1,3-二硫杂环戊烯-2-硫酮-4,5-二巯基的不对称二硫纶金属(Cd,Zn)配合物的热行为和热分解反应动力学

用TG-DTG-DTA联用技术研究了两种1,3-二硫杂环戊烯-2-硫酮-4,5-二巯基的不对称二硫纶金属(Cd,Zn)配合物在动态氮气气氛中的热行为,通过应用EDS技术和元素分析方法对热分解过程中各步反应中间体的组成进行了探索,并结合其物质结构进行了讨论。协同使用四种热分析动力学方法获得了各步反应的热分解动力学参数,并推断了它们的最可能分解反应机理。     

1，3-二羟基丙酮衍生物的合成

以五氧化二磷为引发剂，二甲亚砜氧化1，3-二芳氧基(烷氧基)-2-丙醇化合物合成了一系列1，3-二羟基丙酮衍生物．通过IR和^H NMR对化合物进行了表征．     

1-(4-乙酰氨基苯基)-α-溴代-1-丙酮的合成

1-(4-乙酰氨基苯基)-α-溴代-1-丙酮(I)是合成强心药物匹莫苯(Pirnobendan)和新型抗抑郁类药物氨基酮的主要中间体，它可以1-(4-乙酰氨基苯基)丙酮(Ⅱ)为原料，通过α位溴代得到。主要方法有：(1)以冰醋酸作溶剂，滴加溴的醋酸溶液反应后，经氯仿萃取，硅胶G柱层析分离得产品。     

双-(噻吩甲酰三氟丙酮)合铜的晶体结构

双—(噻吩甲酰三氟丙酮)合铜晶体属三斜晶系,空间群为C_i—Pl。晶胞参数:a=4.573(2)A,b=9.291(4)A,c=11.059(6)A,α=80.87(4)°,β=77.09(5)°,γ=79.23(5)°,V=446.5A°Z=1,D_e=1.889g·cm,F(000)=253e。由于空间位阻效应,在双—(噻吩甲酰三氟丙酮)合铜的分子中,两个噻吩基呈反式构型。对二甲亚砜加合物中两个噻吩基取顺式构型的原因作了进一步阐明。     

1,3-二芳基-1丙酮类化合物的合成

以取代苯乙酮和取代芳香醛为原料,制得一系列1,3-二芳基-1-氧代丙烯类化合物(1a~1j); 1a~1j和对甲苯磺酰肼(2)经还原反应合成了10个1,3-二苯基-1-丙酮类化合物(3a~3j, 3h为新化合物),其结构经¹H NMR, ¹³C NMR, IR和HR-MS（ESI）确证。研究了碱、溶剂、温度和投料比γ[n(1a)/n(2)/n(碱)]对3a产率的影响。结果表明：γ=1/2/2,磷酸钾为碱,乙醇为溶剂,于80 ℃反应4 h, 3a产率最高（80%）。     

1-苯基-2-丙酮的合成新方法

以苯胺为原料,经重氮化反应和改进的Meerwein芳基化反应合成了1-苯基-2-丙酮(2)。优化的Meer-wein芳基化反应条件为:醋酸异丙烯酯为溶剂,氧化亚铜为催化剂,n(氟硼酸重氮盐)∶n(氧化亚铜)=10∶1,反应温度35℃~40℃,反应时间6 h。在优化反应条件下,2的收率达91%。     

金属铜配合物催化氧化1-(3,4-二甲氧基苯)乙醇的动力学研究

合成了1-(3,4-二甲氧基苯)乙醇(DMPE)作为木质素模型物,并用初始速率法研究了40℃时在pH6.5～8.5磷酸缓冲溶液中N,N-双(2-乙基-5-甲基-咪唑-4-亚甲基)乙醇胺合铜、N,N-双(2-(2-羟乙基胺基)乙基)草酰胺合铜和5,7,12,14-四甲基-1,4,8,11-四氮杂环十四-4,7,11,14-四烯合铜催化氧化1-(3,4-二甲氧基苯)乙醇的动力学,提出了1-(3,4-二甲氧基苯)乙醇氧化反应动力学模型,并由此计算出不同pH值条件下催化反应动力学参数k2和Km.铜配合物的催化活性随着pH的增大而增大.具有大共轭体系的配体催化剂表现出更好的催化活性.提出并讨论了H2O2氧化DMPE的催化氧化反应机理.     

铈的α-噻吩甲酰三氟丙酮-哌啶配合物与DNA的键合研究

合成了α-噻吩甲酰三氟丙酮-哌啶合铈(CeTTA₄·HP)配合物,测定其晶体结构,并用紫外光谱、荧光光谱、热变形、电化学、粘度和理论模拟研究了配合物与DNA的键合特性。结果表明：化合物与DNA以插入模式进行作用。     

The sorption of polystyrene by mesoporous glass particles

Changes in the concentration of four polystyrene samples in solution in carbon tetrachloride caused by their interaction with mesoporous glass particles were measured at 298 K. Polystyrene samples with weight-average molecular weights of 8940, 57400, 187000, and 1500000 Da were used. One-constant Carman-Haul kinetic equation was applied to the experimental dependences of the initial rate of the absorption of polystyrene macromolecules by mesoporous glass particles. The initial rates of the absorption of polystyrenes and macromolecule self-diffusion coefficients in sorbent mesopores were calculated. The dependences of kinetic parameters on the molecular weight and size of polystyrene macromolecular coils were discussed.     

TA on Mo(W)/Cu(Ag)/S clusters derived with [Cp*MS3]- Kinetics of [PPh4]2[Cp*WS3(CuBr)3]2 and [PPh4]2[Cp*MoS3(CuBr)3]2

Thermal analysis on two new heterometallic sulfide clusters, [PPh4]2[WS3(CuBr)3]2 and [PPh4]2[MoS3(CuBr)3]2 (where PPh4=tetraphenyl phosphonium, =pentamethylcyclopenta- dienyl), was carried out using a simultaneous TG-DTA unit in an atmosphere of flowing nitrogen and at various heating rates. Supplemented using EDS method, their thermal behavior and properties, together with the composition of their intermediate product, were examined and discussed in connection with their distinctive molecular structure as a dianion, which provided some theoretically and practically significant information. Both clusters decomposed in a two-step mode, but without a stable new phase composed of Mo/W-Cu-S formed during their decomposition process as we expected. Based on TG-DTG data, four methods, i.e. Achar-Brindley-Sharp, Coats-Redfern, Kissinger and Flynn- Wall-Ozawa equation, were used to calculate the non-isothermal kinetic parameters and to determine the most probable mechanisms. This revised version was published online in July 2006 with corrections to the Cover Date.     

The Non-Parametric Kinetics A New Method for the Kinetic Study of Thermoanalytical Data

The application of the new method non-parametric kinetics for kinetic analysis is discussed. It is shown that this method is able to obtain all the kinetic information needed to reproduce accurately the experimental data. To validate this method a set of numerical simulations of the most commonly used kinetic models has been performed and analysed with the method. This revised version was published online in July 2006 with corrections to the Cover Date.     

基于Monte Carlo模拟的化学反应动力学参数估算

提出并采用基于MonteCarlo模拟与动力学实验相结合的化学反应动力学参数估算方法,由基元反应确定MonteCarlo模拟具体做法,将MonteCarlo模拟结果与动力学实验结果相比较,根据比较结果自动调整和优化动力学参数,从而无需事先确定动力学方程即可有效估算各种化学反应的动力学参数值.采用该方法估算了丙烯氨氧化反应动力学参数,并对估算结果进行了分析与讨论.     

无机不饱和类烯H~2NBLiF的构型及异构化反应的理论研究

用HF/D95^*^*解析梯度方法研究了无机不饱和类烯H~2NBLiF的结构,共得到4个平衡构型和3个异构化反应的过渡态构型。动力学分析表明,其中两种平衡构型是它们存在和参加化学反应的基本构型。分析了各平衡构型的结构特点及稳定性,给出了各构型的Mulliken集居数,并简单讨论了两种基本构型的化学活性。     

A polarographic study of Cd(II)-NTA complexes in alkaline solution

Up to four d.c. polarographic waves were observed on voltammetric curves of Cd(II)-nitrilotriacetate complexes on the DME in the pH range 7.0–11.5. These polarograms are analyzed using a non-linear least squares method and the mechanism of the electrode reactions and prior homogeneous reaction are discussed. The kinetic parameters of the separate reactions are calculated and compared with literature values. The accelerating influence of OH^? ions on the dissociation of the complexes is established.     

Kinetic wavelength-pair method as an alternative approach to simultaneous multi-component analysis

The kinetic wavelength-pair method involves adapting a well established principle to the simultaneous kinetic-based determination of two or more compounds with diode-array detection. It relies on measuring the difference in the rate of change of the absorbance with time at two preset wavelength pairs such that the values of these measuring parameters are the result of the contribution of one or two components. The theoretical basis adapted to first-order kinetic-based determinations was established and checked on four systems. The method thus developed was compared with other differential kinetic methods and applied to the resolution of formaldehyde-acrolein mixtures.     

Kinetics and safety analysis of sulfide mineral self-heating

Thermal methods of analysis such as DSC and TGA provide a powerful methodology for the study of solid reactions. This paper proposes an improved thermal analysis methodology for thermal stability and safety investigation of complex solid-state reactions. The proposed methodology is based on differential iso-conversional approach and involves peak separation and individual peak analysis for kinetic analysis and safety prediction. The proposed thermal analysis method was coupled with Mineral Libration Analysis (MLA) to investigate self-heating of sulfide mineral ores. The influence of sample’s mineralogy on thermal degradation was examined and discussed. The information gained from the advanced kinetic analysis of DSC/TGA measurements were up-scaled for TMR and SADT determination. The described thermal analysis method provides not only an understanding of sulfide mineral self-heating, but also aids the design of effective mitigation measures for their adverse environmental and safety effects.     

动力学光度法测定氯气浓度的理论和实验研究

基于氯气可以使酸性溴化钾-甲基橙溶液褪色的反应,提出了一种使用动力学方法测量氯气含量的新方法;对该方法的定量原理进行了详细的理论分析,并通过一套简单的装置验证了这一原理;本文所描述的方法在保持推荐方法即甲基橙比色法优点的同时,大大缩短了测量时间,并使显色溶液的保存和使用更加方便。