GC-MS法测定焦化厂气溶胶中多环芳烃

利用气相色谱-质谱(GC-MS),电子轰击离子化(EI)法测定焦化厂气溶胶中多环芳烃的含量。超声波抽提气溶胶样品,用GC-MS的选择离子监测(SIM)方式测定EPA提出的优先监测的16种多环芳烃的含量。该法的检出限为0.167pg·m~(-3),PAHs的回收率为85.1％～110.5％,相对标准偏差为4.62％～19.4％。应用该法测定气溶胶中PAHs获得满意的结果。     

醋酸烯丙酯选择性地合成烯丙基硒醚

醋酸烯丙酯被Pd(PPh3)4-SmI2还原，并发生中间体π-烯丙基钯络合物的极性 反转，而后与芳基硒溴化物作用，生成烯丙基硒醚．     

THE POLYMERIZATION OF AROMATIC AND HETEROCYCLIC DINITRILES

This review is a concise survey about the works in our laboratory on the polymerization of aromatic and heterocyclic dinitriles, including the polymerization kinetics and mechanism, synthesis of heterocyclic dinitriles, the structure of polymers, and the correlation between the structures of dinitriles and polymerization rates and thermal performances of Polymers.     

硫化镉钠米微粒在聚合物网络中的组装

硫化镉钠米微粒在聚合物网络中的组装黄金满，杨毅，杨柏，刘式墉，沈家骢（吉林大学分子光谱与分子结构重点实验室、集成光电子国家重点实验室，长春，１３００２３）关键词组装，纳米微粒，离子交换，透射电子显微镜，电子衍射由于纳米半导体微粒的物理和化学性质介于分...     

盐类和温度对非离子型表面活性剂溶液粘度的影响

研究在各种盐类存在下,温度对非离子表面活性剂(OP类)溶液粘度的影响,发现相对粘度的对数值与1/T呈线性关系,从直线的斜率可得活化自由能ΔG′。由热力学关系式可计算粘性流体的活化焓ΔII′和活化熵ΔS′。用所得热力学函数对胶束型态的转化进行了讨论。     

4,5-环氧环己烷1,2-二甲酸单丁酯单缩水甘油酯/m-PDA的热固化特征

本文叔述了4,5-环氧环己烷1,2-二甲酸单丁酯单缩水甘油酯(DME-47)/间-苯二胺(m-PDA)体系的热固化特征。结果表明,由于DME-47中羧酸缩水甘油酯型环氧基的反应活性远大于脂环环氧基。所以,DME-47/m-PDA体系固化反应明显地分两阶段进行。由TBA恒温固化动力学数据求得体系在100—160℃表观反应活化能E_α=13.9kcal/mol,在160—240℃E_α=16.6kcal/mol,根据实验数据按Arrhenius关系式推算,本体系在室温25℃下可以存放80天左右而不凝胶化,20℃下可存放120天左右。     

聚醚醚酮微结构及反应特性的量子化学研究

利用AM1对聚醚醚酮重复单元进行条件优化,得出了此分子的最优构型,明确了聚醚醚酮分子链的微观构象,并在此构象基础上进行量子化学计算,给出了健序、净电荷、前线轨道等信息,从理论上研究了聚醚醚酮的磺化反应及热分解反应的一些特性.     

4,4′-二（4-氯甲酰苯氧基）二苯砜的合成

对甲基苯基三甲硅基醚;二氯二苯砜;二（氯甲酰基苯氧基）二苯砜;合成     

The Mechanism on Cyclization, Debenzylation and Oxidation of 1-[1-（Benzyloxy）-3-methylnaphthalen-4-yloxy]propan-2-one

Mansonone compounds represent a series of naturally occurring o-quinones mainly isolated from the heartwood of Mansonia Altissima1 and Ulmus Glabra2. Mansonone F contained oxaphenalene skeleton which was a relatively novel structure and rarely existed in …     

Synthesis, Characterization and Conductivity of α-Keggin-type Nanoparticles, Co(en)_3PMo_(12)O_(40)·8H_2O with Optical Activity

IntroductionChirality is ubiquitous in the nature.Chiralcompounds have many applications in the areas ofmedicine,catalysis and materials,etc. Polyox-ometallates are inorganic polymers,which have at-tracted much interest since they have electri-cal[1_ 3 ] ,magnetic[4] ,optical properties[5_ 7] ,andsome characters as liquid crystals[8,9] .In this workwe report theα- Keggin structural polyoxometallatenanoparticles with optical activities.The opticalactivities of the samples are [α]13 D =+ 1 7…