Dendritic nanowire ultraviolet laser array

Self-organized dendritic crystal growth is explored to assemble uniform semiconductor nanowires into highly ordered one-dimensional microscale arrays that resemble comb structures. The individual ZnO nanowires have uniform diameters ranging from 10 to 300 nm. They are evenly spaced on a stem with a regular periodicity of 0.1-2 micrometer. Under optical excitation, each individual ZnO nanowire serves as a Fabry-Perot optical cavity, and together they form a highly ordered nanowire ultraviolet laser array.     

稀土催化聚酯和共聚酯的合成

研究Ｌｎ＾３＋化合物对聚对苯二甲酸乙二酯及其共聚酯合成反应的催化效果。发现Ｌｎ＾３＋档促进酯化反应的进行,并可在缩聚阶段作为Ｓｂ２Ｏ３的助催化剂使用,通过粘度降测试表明,添加Ｌｎ＾３＋不影响聚酯、共聚酯的热稳定性。对Ｌｎ＾３＋催化酯化和缩聚反应机制进行探讨。     

大孔阳树脂催化合成苯乙酸酯

利用Ｄ７２，Ｄ６１大孔阳离子交换树脂为催化剂，催化合成苯乙酸异戊酯、苯乙酸丁酯、苯乙酸苄酸、苯乙酸苯乙酯、苯乙酸茴香酯。对影响反应的诸因素进行了讨论，酯收率为９０％左右。     

阴离子交换树脂催化醇的氰乙基化反应

利用阴离子交换树脂为催化剂，进行了醇的氰乙基化反应，对影响反应的诸因素进行了讨论。     

Isolation and Characterization of Anti-Inflammatory Lignans from Oenanthe javanica

Chemistry of Natural Compounds - A new lignan, named 1-phenylpropenoate-4,8′-lignan A (1), and three known lignans (2–4) were isolated from Oenanthe javanica (Blume) DC. for the first...     

STUDY ON PET-PA66 COPOLYMER

In this work the PET-PA 66 copolymers are obtained. The characterization of chemical structure of copolymer chain by NMR method is also given. It is shown that when the 66 Nylon salt is added in the copolycondensation, the adipic acid and hexamethylenediamine reacted mainly by itself and the obtained copolymer is a random copolymer, and when the Nylon 66 oligomer is added, the obtained copolymer is a block copolymer. The result of NMR analysis is demonstrated by properties investigation.     

聚苯乙烯支载N-苄基-N-甲基氨基吡啶催化合成乙酸芳樟酯的研究

以大孔聚苯乙烯氯球为原料,在氮气保护及氢化钠存在下,将其与４ 氨基吡啶及硫酸二甲酯反应,制成聚苯乙烯支载Ｎ 苄基 Ｎ 甲基氨基吡啶（ＢＭＡＰ）催化剂．与文献相比,该法具有反应时间短,价格低,制备的ＢＭＡＰ活性高等特点．经过元素分析、ＦＴＩＲ及ＭＡＳ１Ｈ ＮＭＲ对其结构进行表征．利用该催化剂进行了芳樟醇的乙酰化反应,对影响反应的诸因素如反应物料比,反应时间,反应温度等进行了讨论,芳樟醇的转化率为９９％以上,总酯率为９５％左右,其中芳樟酯的产率为６０％以上（目前工业上使用Ｈ３ＰＯ４催化剂芳樟酯产率为５０％左右）．催化剂通过再生连续使用五次,活性无明显下降．     

新型成纤共聚酯

介绍了成纤共聚酯的研究工作主要是对聚对苯二甲酸乙二醇酯的研究、首先阐述了共聚单体的化学结构对共聚酯性能的影响。实验结果指出了经曲有限元 含有间）邻）位苯环结构和含柔性链结构的共聚是具有明显不同的物理例如,后者的玻璃化温度下降比前者大的多,前者的结昌速度减慢,而后乾的结晶速度加快。其次是阐述了共聚酯的物理性能对其纤维性能的影响,例如,玻璃化温度的降低有利于纤维染色性能的提高,含有柔性 的共聚酯玻璃化     

Hepatoprotective phenylethanoid glycosides from Cirsium setosum

Two new phenylethanoid glycosides, namely β-D-glucopyranoside, 1″-O-(7S)-7-(3-methoxyl-4-hydroxyphenyl)-7-methoxyethyl-3″-α-L-rhamnopyranosyl-4″-[(8E)-7-(3-methoxyl-4-hydroxyphenyl)-8-propenoate] (1) and β-D-glucopyranoside, 1″-O-(7S)-7-(3-methoxyl-4-hydroxyphenyl)-7-methoxyethyl-3″-α-L-rhamnopyranosyl-4″-[(8E)-7-(4-hydroxyphenyl)-8-propenoate] (2), together with six phenylethanoid glycosides were isolated from Cirsium setosum. Their structures were elucidated by their spectroscopic data and references. Compounds 2, 4, 5, 7 and 8 (10 μM) exhibited moderate hepatoprotective activities. Compounds (3–8) were obtained from this plant for the first time.