有机硅橡胶裂解产物气相色谱-质谱联用分析

以室温硅橡胶和高温硅橡胶产品的边角废料及次品作为实验原料,进行到催化和碱催化裂解,将裂解产物进行气相色谱－质谱（ＧＣ－ＭＳ）联用分析,经过质谱数据检索,确定了两种酸催化产物的组成,高温橡胶的酸催化裂解产物主要是环状化物合;室温橡胶的酸催化一妥产物中有太和链状两类化合物,该实验为硅像胶废料利用提供了依据。碱催化产物太复杂,产物利用存在困难。     

甲基萘择型烷基化产物的毛细管气相色谱-质谱分析

用色谱－质谱分析了在不同沸石分子筛催化剂上甲基萘择型烷基化产物组成及其含量；试用不同类型毛细管柱进行分析，找出最佳分析条件，共分离出26个峰，用面积归一化法测定其相对含量，并用气相色谱－质谱法对产物进行了鉴定。     

间－异丙基甲苯氧化产物的高效液相色谱研究

本文用反相高效液相色谱法（ＨＰＬＣ）分离间－异丙基甲苯氧出产物，采用质谱（Ｍｓ）核磁共振谱（ＮＭＲ）等方法对色谱柱后各流出物作定性鉴定，从而首次建立了用反相液相色谱法测定该氧化产物中的间－异丙基甲苯叔碳氢化过氧化物、间－异丙基甲苯伯碳氢化过氧化物、间－α，α－二甲基甲基苄醇、间－枯茗醇、间－甲基苯乙酮、间－枯茗醛的方法。     

间－异丙基甲苯氧化产物的高效液相色谱研究

 本文用反相高效液相色谱法（ＨＰＬＣ）分离间－异丙基甲苯氧出产物，采用质谱（Ｍｓ）核磁共振谱（ＮＭＲ）等方法对色谱柱后各流出物作定性鉴定，从而首次建立了用反相液相色谱法测定该氧化产物中的间－异丙基甲苯叔碳氢化过氧化物、间－异丙基甲苯伯碳氢化过氧化物、间－α，α－二甲基甲基苄醇、间－枯茗醇、间－甲基苯乙酮、间－枯茗醛的方法。     

吡咯等离子体聚合产物分析

用色谱－质谱、裂解色谱－质谱、电子自旋共振、红外光谱及元素分析等方法鉴定了吡咯等离子体聚合过程中气相冷凝物和聚合物的组成，根据分析结果提出了吡咯等离子体聚合的自由基反应历程。     

三种O－异戊烯基苯丙素类天然产物的首次合成

以香草醛为起始原料，经O－异戊烯基化、Witting反应、水解、还原、氧化等 反应步骤，首次合成了三种苯丙素天然产物boropinalA（1），boropinalC（2） boropinicAcid（3）,有化合物结构均由核磁共振氢谱，质谱及红外光谱确证，用 X射线衍射法测定了3的晶体及分子结构。     

北苍术超临界CO2萃取产物的成分

用气相色谱－质谱－计算机联用法分析了北苍术的超临界CO2萃取产物的成分,鉴定出苍术酮、β－桉叶油醇、苍术醇31化合物,占出峰总面积的88．1％,并与传统水蒸汽蒸馏法（SD）提取的挥发油成分进行了对比。结果证明,两种方法抽提的苍术主成分基本相同,但超临界CO2萃取产物比SD产物多出现了一些重质组分,萃取更完全而有效。     

繁峙煤镜质组的生烃特征与热解产物生成动力学研究

本文利用付立叶红外光谱（ＦＴＩＲ），热解气相色谱（Ｐｙ－ＧＣ）及热解气相色谱质谱（Ｐｙ－ＧＣ－ＭＳ）联用技术等分析手段，探讨了我国山西繁峙煤镜质组的生烃特征，鉴定了如气体烃、正构脂肪烃、苯酚、单环芳烃以及甲氧基酚类等热解产物６７种化合物。用相继等温热解法一级反应动力学模型，求取了热解产物如气体组分（Ｃ１￣Ｃ６）、轻烃（Ｃ７￣Ｃ１４）、重烃（Ｃ１５￣Ｃ３０）、正构脂肪烃（ｎＣｉ）、烷基芳烃、苯酚等的     

GC-MS法分析肼类燃料中的杂质成分及氧化产物

应用气相色谱-质谱联用法对肼类燃料进行了定性分析，确定了3种肼类燃料的杂质和氧化产物，并对偏二甲肼氧化产物的产生及发黄机理进行了初步探讨。     

蒲县藻煤藻类体热解产物单组分生成动力学

用快速热解气相色谱法以及热解气相色谱－质谱联用技术，鉴定了山西蒲县藻煤藻类体的热解产物组成。利用等温一级反应动力学模型，计算了蒲县藻煤藻类体热解产物中正构烷烃、正构烯烃、苯（Ｂ）、甲苯（Ｔ）、萘以及热解总产物（Ａｒ）等组分生成动力学参数，探讨了这些动力学参数与和生烃的关系。     

Transformations of Peroxide Products of Alkene Ozonolysis

Russian Journal of Organic Chemistry - The review summarizes the data published over the past decade on the transformations of peroxide products of alkene ozonolysis, such as cleavage reactions and...     

Unconventional Cellulose Products Through Nucleophilic Displacement Reactions

Summary: The paper highlights the synthesis of unconventionally functionalized cellulose derivatives obtained by nucleophilic displacement (S_N) reactions. The key intermediates, cellulose sulphonates, are discussed due to the fact that sulphonate groups play the major role as leaving group in S_N reactions with the biopolymer. A short overview about “classical” S_N reactions will be given. The main part of the review is focused on novel cellulose products in particular aminodeoxy cellulose derivatives showing monolayer formation, click chemistry with cellulose starting from deoxyazido (copper-catalyzed Huisgen reaction) yielding products with methylcarboxylate-, 2-aniline-, 3-thiophene moieties, e.g., and new selectively dendronized cellulose based materials. Structure characterization and typical applications are briefly reviewed as well.     

GC of Catalytic Reactions Products Involved in the Promising Fuel Synthesis

Catalytic reactions involved in the synthesis of the promising kinds of novel fuel and products formed in these reactions were systematized according to the resulting fuel type. Generalization of the retention of the substances comprising these products is presented. Chromatograms exhibiting their separation on chromatographic materials with the surface of different chemical properties are summarized. We propose procedures for gas-chromatographic analysis of the catalytic reactions products formed in the synthesis of hydrogen, methanol, dimethyl ether and hydrocarbons as a new generation of fuel alternative to petroleum and coal. For partial oxidation of methane into synthesis gas, on-line determination of the components obtained in the reaction was carried out by gas chromatography and gas analyzer based on different physicochemical methods (IR spectroscopy and electrochemical methods). Similarity of the results obtained using these methods is demonstrated.

     

Products and mechanism of secondary organic aerosol formation from reactions of linear alkenes with NO3 radicals

Secondary organic aerosol (SOA) formation from reactions of linear alkenes with NO(3) radicals was investigated in an environmental chamber using a thermal desorption particle beam mass spectrometer for particle analysis. A general chemical mechanism was developed to explain the formation of the observed SOA products. The major first-generation SOA products were hydroxynitrates, carbonylnitrates, nitrooxy peroxynitrates, dihydroxynitrates, and dihydroxy peroxynitrates. The major second-generation SOA products were hydroxy and oxo dinitrooxytetrahydrofurans, which have not been observed previously. The latter compounds were formed by a series of reactions in which delta-hydroxycarbonyls isomerize to cyclic hemiacetals, which then dehydrate to form substituted dihydrofurans (unsaturated compounds) that rapidly react with NO(3) radicals to form very low volatility products. For the approximately 1 ppmv alkene concentrations used here, aerosol formed only for alkenes C(7) or larger. SOA formed from C(7)-C(9) alkenes consisted only of second-generation products, whereas for larger alkenes first-generation products were also present and contributions increased with increasing carbon number apparently due to the formation of lower volatility products. The estimated mass fractions of first- and second-generation products were approximately 50:50, 30:70, 10:90, and 0:100, for 1-tetradecene, 1-dodecene, 1-decene, and 1-octene SOA, respectively. This study shows that delta-hydroxycarbonyls play a key role in the formation of SOA in alkene-NO(3) reactions and are likely to be important in other systems because delta-hydroxycarbonyls can also be formed from reactions of OH radicals and O(3) with hydrocarbons.     

Kinetically Controlled Synthesis of Four- and Six-Member Cyclic Products via Sequential Aryl-Aryl Coupling on a Au(111) Surface

We synthesize four- and six-member cyclic products via sequential multi-step aryl-aryl coupling reactions of 2,3,6,7,10,11-hexabromotriphenylene molecules on a Au(111) surface. The final products as well as the organo-gold intermediate structures are identified using scanning tunneling microscopy and density-functional theory simulation. By adjusting reaction temperature and post-annealing temperature, we enhance/suppress the yields of the four-member and six-member cyclic products. We propose an underlying mechanism which is associated with different reaction kinetics of the first-order and second-order reactions. This work exemplifies intricate kinetically-controlled on-surface synthesis when multiple reactions of different reaction order are involved.     

电子能量对沿面介质阻挡放电等离子体化学产物的影响

基于光电倍增管研制了一套无触发信号的双通道光学探测系统, 并组装了测试样机, 实现了对沿面介质阻挡放电(SDBD)等离子体约化电场的测量, 进而通过BOLSIG+软件获得了电子能量. 采用原位紫外吸收光谱和傅里叶变换红外光谱, 研究了SDBD等离子体在不同电压和频率下的化学产物的浓度变化, 并结合空气等离子体化学反应揭示了产物相互作用的微观机理. 结果表明, 电子能量能够改变电子碰撞反应的速率系数, 调控化学反应的源头活性粒子的浓度, 进而影响到化学产物的生成和猝灭.     

Laser Detection of Reaction Products: Slicing versus Projection Techniques

Combining laser spectroscopy and two-dimensional imaging technologies, researchers can execute sophisticated experiments to measure time-resolved spatial profiles of state-selected reactants and products of elementary chemical reactions. Besides the scalar observables, there are issues of vector correlations of reaction products which are best studied by imaging techniques. Advantages and drawbacks of various projection and slicing detection techniques are elucidated. The problem of vector correlations in concerted three-body dissociations can be tackled by the slicing techniques and a new analysis algorithm.     

Methylchlorophosphanes and Their Reaction Products

Methyldichlorophosphane and dimethylchlorophosphane can be prepared only with considerable difficulty. The ease with which they yield numerous reaction products is an indication of the pronounced reactivity of these organohalophosphanes. Possible applications of such organophosphorus compounds exist inter alia in the fields of plant protection, corrosion prevention, and flame retardants, as well as in the catalysis of gas phase reactions, for instance the desulfurization of gas mixtures.     

Efficient Enantioselective Syntheses of Chiral Natural Products Facilitated by Ligand Design

The employment of enantioselective transition‐metal‐catalyzed transformations as key steps in asymmetric natural product syntheses have attracted considerable attention in recent years owing to their versatile synthetic utilities, mild conditions and high efficiency in chirality generation. The chiral catalysts or supporting ligands are believed to be crucial for the requisite reactivity and enantioselectivity. Therefore, the rational design of chiral ligands is at the heart of developing new asymmetric transition‐metal catalyzed reactions and provides an avenue to the asymmetric synthesis of natural products. Our group has been engaged in the development of transition‐metal‐catalyzed enantioselective cross‐coupling, cyclization and other related reactions and the application of these methodologies to natural product syntheses. In this account, we summarized our recent synthetic efforts towards the efficient total syntheses of several different types of natural products including terpenes, alkaloids and polyketides facilitated by the design of a series of versatile P‐chiral phosphorous ligands.     

Stereodefined Acyclic Polysubstituted Silyl Ketene Aminals: Asymmetric Formation of Aldol Products with Quaternary Carbon Stereocenters

The regio‐ and stereoselective formation of stereodefined polysubstituted silyl ketene aminals is easily achieved through selective combined carbometalation–oxidation–silylation reactions. These substrates are ideal candidates for Mukaiyama aldol reactions with aliphatic aldehydes as they give the aldol products with a quaternary carbon stereocenter α to the carbonyl groups in outstanding diastereoselectivities.