超声波法合成丙偶姻的研究

丙酸乙酯与金属钠还原缩合，采用超声波加速反应合成丙偶烟。结果表明，采用超声波法，反应时间由普通方法的6h缩短为3.5h，收率为55.8%，高于普通方法的51.6%。     

生长调节剂对雪柳嫩枝插效果的影响

对雪柳一年生枝条用ABT1和2,4-D 2种生长调节剂的处理试验结果表明,不同的处理药剂能明显提高雪柳枝条扦插的成活率和生根率.其中用5×10-5的2,4-D处理1 h效果最好,其次是用8×10-5 ABT1处理1 h.     

对二茂铁基苯甲酸的合成和表征

以对－氨基苯甲酸为原料与亚硝酸钠和盐酸在低温下反应，制备出对－氨基苯甲酸的重氮盐， 再让其与二茂铁（摩尔比 1∶ 1）在低温和相转移催化剂的存在下反应，再由水蒸气蒸馏分离，合成出对－二茂铁基苯甲酸。通过多步实验确定出最佳合成条件，并用元素分析、红外光谱、质谱对产物进行表征。     

丰富网络信息，加快建设数字化校园

介绍目前校园网络信息的分布与作用，并对其发展趋势进行了分析。     

脂肪取代基卟啉的合成及其L-B膜

合成了两种脂肪基卟啉及以Co2+,Zn2+为中心离子的金属卟啉。用红外光谱、紫外可见光谱和元素分析进行了表征。将上述六种卟啉制成L-B膜,并测定了膜的性质。     

Synthesis and characterization of [60]fullerence ferrocenylmethyl derivatives

Two new [60]fullerene ferrocenylmethyl derivatives have been prepared via different approaches and characterized by UV-Vis, FT-IR, NMR, FAB-MS spectra and VPO. The second approach, i.e. reacting fullerene with ferrocenylmethyl azide directly, was never reported as yet. Foundation item: Supported by the Fund for Ph. D Programme from Ministry of Education, P. R. China (98048624) Biography: Li Xin-hong (1973-), female, Ph. D candidate, research direction: fullerene chemistry.     

Synthesis and phase behavior of ω-(cholesteroxycarbonyloxy)-alkyl 3,3,5,5-tetramethyl-3,5-disila-4-oxacyclohexyl-carboxylate

Four new organosilane compounds containing cholesteryl group were synthesized by esterification of 3,3,5,5-tetramethyl-3,5-disila-4-oxa-cyclohexane-1-carboxylic acid and ω-hydroxyalkyl, cholesteryl carbonate in the presence of DCC and DMAP. Their structures were characterized by¹H-NMR, IR and elemental analysis. Their phase behaviors were investigated by differential scanning calorimetry (DSC) and polarized microscopy. Results showed that these four organosilane compounds were all liquid crystalline and longer spacer was advantageous to orientation of organosilane heterocycle and cholesteryl group. Biography: TANG Hong-Ding (1972-), male, Ph. D candidate, Research direction: orgenosilicon materials     

硫酸铁铵催化合成顺丁烯二酸二丁酯

在十二水合硫酸铁铵存在下由顺丁烯二酸酐和正丁醇制备了顺丁烯二酸二丁酸。在马来酸酐、正丁醇和十二水合硫酸铁铵的摩尔比为1:4：０．０８３，回流温度下反应１１０－１２０分钟，酯收率可达９４．７％。，     

高分子量聚丙烯酸钠的合成工艺研究

采用水溶液聚合法,研究了单体浓度、引发剂用量、反应温度及反应时间对聚丙烯酸钠分子量的影响,探索出了最佳工艺条件:反应温度为40℃-45℃,反应时间为4h,过硫酸铵用量为0.02%,单体浓度为45%,聚丙烯酸钠分子量高达106-107。