苯氨基甲酸甲酯(MPC)的合成研究

对碳酸二甲酯(DMC)和苯胺(AN)反应生成MPC的合成工艺过程和条件进行了研究.对进料方式进行了改进,就体系反应物料配比的大小、反应时间、反应温度等因素和条件对合成MPC的影响进行了详细研究,结果发现以CSX为催化剂,在150℃,n(DMC)∶n(AN)=5∶1的开放体系中反应3 h,MPC的收率可达94.06%,选择性为96.41%.     

北京工商大学科研成果“多硫代聚芳基乙炔的合成及电化学性能研究”荣获解放军科技进步三等奖

日前，2005年度解放军科技进步奖颁发，北京工商大学（下称我校）孙家跃教授、杜海燕副教授与军事医学研究所联合研究成果“多硫代聚芳基乙炔的合成及电化学性能研究”荣获解放军科技进步三等奖．近年来，我校科研团队勇攀高峰、不断创新，科研成果屡获解放军科技进步奖，本次是继2001年获得一等奖，2003年获得二等奖后第3次荣获该奖项．     

Liquid Flow in Shaped Fiber Bundle

By computation and comparison of the critical spreading coefficient parameter, it was found that shaped fiber bundle is better for wetting. Liquid-air interface tension of liquid arising the shaped fiber bundle body is considered as one critical factor besides liquid viscosity, inertia force and liquid-fiber interface tension. Experimental result simulation demonstrated that the liquid-air interface tension is correlated with the geometric size of the liquid arising in body, Φ0 （x） and which is affected by the cross sectional shape of fiber and the radius of single fiber. The shaped fiber bundle model is/ntroduced to/nvestigate liquid flow in fiber assembly. The model is generated based on a random function for stochastic forming of fibers in bundle and it is necessary to combine this fundamental model with physical explanation for investigation of liquid flow in fiber assembly.     

4-溴-N,N-二(4-叔丁基苯基)-苯胺的合成及其光谱性能的研究

以对溴苯胺和对叔丁基苯甲酸为原料,经Hofmann降解、Sandmeyer和Ullmann反应等反应,合成得到了一种具有空穴传输性能的环金属配合物电致磷光中间:4-溴-N,N-二(4-叔丁基苯基)-苯胺,反应产率为43.5%,产物结构经核磁氢谱、质谱得到了表征.紫外吸收光谱和荧光光谱研究表明:该化合物具有强烈的紫外-可见吸收和荧光发射性能,其氯仿溶液的最大紫外吸收波长为306 nm,最大荧光发射波长是543 nm.但薄膜的最大荧光发射波长蓝移至458 nm.     

Petri网的分享合成操作

通过引入Fork算子，建立Petri网的一种新的合成操作一分享合成，分享合成探作与传统的共享合成操作相比更适合于描述信息系统的建模。在分享合成时，子网中任何与分享库所无关的变迁序列在合成后保持不变，分享合成对于子网内由分享库所引发的变迁序列也保持不变。分享合成实际上增加了分享库所引发变迁序列发生的机会，使得到达输出集的机会增加。最后介绍了Petri网分享合成操作在信息系统安全管理中的应用。     

磷钨酸铈催化合成苯甲醛乙二醇缩醛

以自制的磷钨酸铈为催化剂,通过苯甲醛和乙二醇为原料合成了苯甲醛乙二醇缩醛,并探讨了其催化活性,研究了反应物料配比、催化剂用量、反应时间、催化剂重复使用性能等因素对反应的影响.实验结果表明:合成苯甲醛乙二醇缩醛较适宜的反应条件为:苯甲醛0.1 mol,n(苯甲醛)/n(乙二醇)=1.0/1.7,催化剂用量为反应物料总质量的1.0%,甲苯为带水剂,反应时间2.0 h.上述条件下,苯甲醛乙二醇缩醛的产率可达79.5%.     

2′,4′-二氟-2-(1H-1,2,4-三唑-1-基)苯乙酮的合成

在相转移催化剂存在的条件下,以1,2,4-三氮唑和2-氯-2′,4′-二氟苯乙酮为原料合成2′,4′-二氟-2-(1H-1,2,4-三唑-1-基)苯乙酮,分别讨论了原料配比、反应时间、缚酸剂、溶剂对合成反应的影响,确定了最佳合成工艺条件,产物收率可达82.6%。     

四聚1，3．二硫杂环戊烯-2-硫酮冠醚衍生物的合成

以二（碘乙基）醚与4,5．二氰乙硫基-1，3．二硫杂环戊烯-2-硫酮为起始原料，采用氰乙基保护与脱保护技术，通过多步缩合反应以较好的收率合成了含4个1，3．二硫杂环戊烯-2-硫酮并硫杂36冠-12（5），给出了目标化合物的有效合成方法，并用1HNMR，MS和EA对其进行了表征．     

Synthesis and photocurrent response of porphyrin-containing conjugated polymers

In recent years conjugated polymers have attracted considerable attention because of their potential appli- cations in the fields of light emitting diodes, photo- voltaic devices, and sensors[1―7]. In the fabrication of semiconductor photovoltaic devices…     

Synthetic seismograms of ground motion near earthquake fault using simulated Green’s function method

Seismograms near source fault were synthesized using the hybrid empirical Green＇s function method where the discretely simulated seismic waveforms are used for Green＇s functions instead of the observed waveforms of small earthquakes. The Green＇s function seismic waveforms for small earthquake were calculated by solving wave equation using the pseudo-spectral method with the staggered grid real FFT strategy under a detailed 2-D velocity structure in Kobe region. Magnitude and seismic moment of simulated Green＇s function waveforms were firstly determined by using the relationship between fault length and corner frequency of source spectrum. The simulated Green＇s function waveforms were employed to synthesize seismograms of strong ground motion near the earthquake fault. The synthetic seismograms of the target earthquake were performed based on the model with multiple source rupture processes. The results suggest that synthesized seismograms coincide well with observed seismic waveforms of the 1995 Hyogo-ken Nanbu earthquake. The simulated Green＇s function method is very useful for prediction of the strong ground motion in region without observed seismic waveforms. The present technique spreads application field of the empirical Green＇s function method.