Facile synthesis of 1-(N-butyl-1,8-naphthalimide-4′-yl)-3-(4-methoxyl-phenyl)-5-phenyl-pyrazoline/polyaniline core-shell nanofibers and polyaniline nanotubes

1-(N-butyl-1,8-naphthalimide-4′-yl)-3-(4-methoxyl-phenyl)-5-phenyl-pyrazoline (BMPP)/polyaniline core-shell nanofibers were synthesized by in situ chemical oxidative polymerization of aniline using BMPP nanofibers as template. BMPP/polyaniline core-shell nanofibers exhibited uniform fibrilliar morphology and possessed BMPP nanofiber core and polyaniline shell, which existed in the form of nanoparticles. BMPP nanofibers were fabricated by the modified reprecipitation method with water as poor solvent. After BMPP/polyaniline core-shell nanofibers were washed with ethanol as good solvent to remove BMPP cores, polyaniline nanotubes with netlike structures were obtained. The molecular structures of BMPP/polyaniline nanocables were characterized by Fourier transform infrared spectroscopy and UV-vis spectroscopy, respectively. The core/shell structures of BMPP and polyaniline endowed BMPP/polyaniline core-shell nanofibers good electrochemical properties in comparison with BMPP nanofibers.     

Solution-phase synthesis of Cu2O cubes using CuO as a precursor

We describe a facile route for the synthesis of Cu₂O cubes using CuO as the precursor and hydrazine hydrate as the reducing agent. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) observations indicate that the Cu₂O products are composed of cubes with an edge length of 0.7-1.2 μm. This method is surfactant-free, and well-dispersed Cu₂O cubes can be obtained through this route. The presence of small amounts of ions in reaction solution has a great influence on the morphology of Cu₂O products.     

A convenient method for preparing shape-controlled nanocrystalline Cu2O in a polyol or water/polyol system

A facile method capable of preparing well-dispersed Cu₂O nanocrystals with controllable shapes, such as rods, needles to other irregular shapes, has been developed. The different shapes of Cu₂O nanocrystals can be obtained simply by adjusting the composition of the reaction system. For example, if small amounts of poly(vinyl pyrrolidone) (PVP) was added in a mixture of Cu(NO₃)₂ and ethylene glycol, the needle-shaped nanocrystals could be formed. Interestingly further addition of small amounts of water in above system enabled us to obtain Cu₂O nanorods. Moreover the ratio of water/EG and the species of stabilizers played a crucial role in fine tuning the structure and size of as-prepared Cu₂O nanocrystals.     

纳米级含钴介孔分子筛的合成与表征

以硅酸钠、偏铝酸钠和氯化钴为原料,十六烷基三甲基溴化铵为模板剂,体积比为1：1的硫酸使pH＝11,用两步水热法制备含钴介孔分子筛（CoMCM-41）。用粉末X射线衍射、Fourier变换红外、程序升温还原、原子力显微镜、比表面和孔径测定等方法表征样品的物化性能。结果表明：合成的纳米CoMCM-41,经550℃焙烧可以有效去除模板剂并不影响孔结构。CoMCM-41的比表面积大于500m^2／g,孔径分布为3．5～4．0nm,粑径分布为20～40nm。o因此,用两步水热法可以控制粒径并制备纳米级CoMCM-41．     

无机层状化合物及其应用述评

无机层状化合物及其层间改性产物具有广阔的应用前景。本文综述了层状化合物的最新研究进展 ,以及利用层间嵌入反应制备纳米复合材料的方法和应用。     

含Ni介孔分子筛的合成及其对苯加氢催化性能

采用水热法合成出不含镍和含镍的硅基介孔分子筛.利用XRD、FT-IR、TPR、TEM和比表面孔径测定等手段对样品进行了表征.结果表明：合成出有序性好的介孔分子筛（MCM-41）,550 ℃焙烧可以将模板剂有效去除,所合成介孔分子筛负载Pt后介孔有序性降低,但是介孔结构仍然存在.苯催化加氢反应研究表明：不含Ni的介孔分子筛不具有加氢活性,当将其负载Pt后具有苯加氢催化活性;含Ni介孔分子筛本身具有苯加氢活性,含Ni介孔分子筛负载Pt后苯加氢催化活性有较大的提高,所有样品的环己烷选择性都接近100 %,说明含Ni介孔分子筛可以直接作为苯加氢反应的催化剂或作为苯加氢催化剂良好的载体.     

二氨基二苯基羧酸盐的合成与表征

以对氨基苯甲酸与二价金属氧化物（或氢氧化物）合成了一系列不同金属元素（Ｍｇ，Ｃａ，Ｓｒ，Ｂａ，Ｐｂ，Ｃｏ，Ｎｉ）的二胺，采用元素分析，ＩＲ和ＨＮＭＲ对其结构进行了表征，测定了它们在水中和ＤＭＦ中的电导率，并以ＴＧ－ＤＴＡ研究了其热性能，结果表明，这类二胺具有较好的耐热性，在ＤＭＦ等有机溶剂中为弱电解质，可作耐热高聚物的单体。     

Gliomatosis cerebri: findings with computed tomography and magnetic resonance imaging

OBJECTIVES: In an effort to critically examine the antitumor activity of altretamine (hexamethylmelamine) as salvage therapy of platinum-refractory ovarian cancer, the Gynecologic Oncology Group initiated a Phase II trial of the agent administered in this clinical setting. METHODS: Altretamine was administered at a dose of 260 mg/m2 orally for 14 days in a 28-day course. Treatment was continued until disease progression or unacceptable side effects prevented further therapy. A total of 36 patients (median age: 56.5) were treated on this trial, of whom 33 were evaluable for toxicity and 30 for response. All patients had previously received either cisplatin or carboplatin and paclitaxel. RESULTS: The major side effect was emesis (grade 3-4, 7/33, 21%). The objective response rate was 10% (one complete response, two partial responses). CONCLUSION: We conclude that altretamine has limited activity in platinum-refractory ovarian cancer.     

扩链双马来酰亚胺的合成与表征

分别合成了一系列酰胺键扩链的双马来酰亚胺和酰亚胺键扩链的双马来酰亚胺，通过ＩＲ，ＨＮＭＲ对其结构进行了表征，并通过ＴＧ－ＤＴＡ对其热性能进行了研究。结果发现它们具有良好的耐热性。