微波化学的应用研究进展

对近年来发表在化工和化学及相关领域内公开出版物中微波化学的相关论文进行分析讨论,介绍了微波及其加热机理和国内外微波有机化学、无机化学及其它方向上的研究现状和进展,阐述了数值模拟计算在微波化学中的应用。引用参考文献46篇。     

Facile Synthesis of 1, 2-Diazepine Derivatives under Microwave Irradiation

An efficient and convenient synthesis of 3, 5, 7-triaryl-4H-1, 2-diazepine from 2, 4,6-triarylpyrylium salts and hydrazine in water under microwave irradiation is reported. The same reaction can be conducted using 2, 4, 6-triarylthiopyrylium salts and hydrazine.     

First Total Synthesis of (±)-Aiphanol

Aiphanol was isolated from the seeds of Aiphanes aculeate Willd. (Arecaceae) collected in Peru and was reported to exhibit significant inhibitory activities against cyclooxyge- nases-1 and -2. The structure of aiphanol was elucidated by spectroscopic methods as an unprecedented stilbenolignan skeleton in which a stilbene moiety is linked to a phenylpropane unit through a dioxane bridge1. In our previous works the synthetic approach to 1,4-benzodioxane lignans were achieved2. Since aiphanol…     

镧掺杂粘土源含铜氧化物催化剂的制备、表征及催化性能

采用共沉淀和水热法合成了不同阴离子粘土前驱型复合氧化物催化材料,样品经XRD,FTIR,TPR,TG-DSC,SEM进行表征.同时考察了铜含量在掺杂和不掺杂稀土时对甲烷催化燃烧的影响,结果发现随含铜量增加催化活性增加;未掺杂La的催化剂在高温下出现失活现象,而掺杂型催化剂稳定性良好.同时,制备方法对催化剂的性能有显著影响,在不同制备前驱物pH的条件下,使用共沉淀和水热法合成的阴离子粘土材料,合成时的pH均对催化剂的活性影响较大;同时焙烧温度对催化活性有不同程度的影响.     

四对-乙酰胺苯磺酰氧基杯[4]芳烃的合成

以对叔丁基苯酚为起始原料,通过缩合、取代反应合成了25,26,27,28-四对-乙酰胺苯磺酰氧基对叔丁基杯[4]芳烃,其结构经FT—IR,^1H NMR和FAB-MS表征。     

木瓜中微量元素含量分析

用火焰原子吸收光谱法(FAAS)测定了广州市郊部分木瓜的微量元素含量。结果表明,木瓜中K、Na、Ca、Mg等元素的含量都比较丰富,并讨论了这些有益元素与人体健康的关系。     

梯度加压毛细管电色谱同时分离大黄提取液中5种蒽醌类化合物

建立了同时分离药用大黄提取液中大黄酸、芦荟大黄素、大黄素、大黄酚和大黄素甲醚5种蒽醌类活性成分的梯度加压毛细管电色谱的新方法.实验结果显示,大黄提取液中的5种蒽醌化合物可在22min内完全分离,梯度洗脱微柱液相色谱的柱效为等度洗脱微柱液相色谱的6.63倍,梯度毛细管电色谱的柱效为梯度微柱液相色谱的4.6倍.     

通用型激光诱导荧光微流控芯片分析仪的研制与性能考察

设计和研制了一种通用型激光诱导荧光微流控芯片分析仪.检测部分按共聚焦检测原理设计,采用CCD(电荷耦合器件)监测通道,三维自动调节聚焦,发射波长滤光片可方便地更换以适应多种染料选择,能分别显示进样和分离通道2条电流-时间曲线.考察了该分析仪的检测灵敏度、检测极限和线性范围,显示了分析灵敏度高,检测限低和线性范围宽等特点,在自制注塑型PMMA塑料芯片上实现了φX174Haedi-gesT_dNA片段的分离测定和烟叶act基因PCR产物的分析     

分子印迹聚合物传感器的研究与发展

综述了分子印迹聚合物的历史发展、制备方法、聚合体系的选择、性能表征及作用机理。主要介绍了其作为传感器敏感膜方面的应用,并对需解决的问题提出了建议。     

SiOx纳米管的制备及其发光特性

Amorphous SiOx nanotubes with homogeneous diameters were fabricated in large-scale on silicon substrate by thermal evaporation method, with liquid gallium as medium. The average diameter of tubes is about 80 nm and the length is more than 10 1m, with small ratio between the inner and outer diameter of the tube. The silicon element in the substrate and the residual oxygen element in reaction chamber were first dissolved into liquid Ga. Then the SiOx precipitated from the surface of gallium droplet, forming the nanotube structure with Ga droplet being the center. The room temperature photoluminescence measurements under excitation at 260 nm show that the SiOx nanotubes has a strong blue emission at 453 nm with two shoulders at 410 and 480 nm respectively, which may be related to oxygen defects. The preparation method improved the traditional complicated method and also provided a new way to fabricate SiOx nanotubes in large quantity.