Carbon Aerogel Films Synthesized at Ambient Conditions

Carbon aerogels derived from organic sol-gel process and supercritical drying are novel porous materials with interconnect structures and higher electrical conductivity, which are considered to be ideal electrode materials for supercapacitors and rechargeable batteries. The objective of the research was to synthesize carbon aerogel films at ambient conditions. Resorcinol formaldehyde (RF) and carbon aerogel films have been produced with extremely high RC ratio (molar ratio of resorcinol to catalyst) followed by subcritical drying. The structure of the porous films was investigated using electron scanning microscope. The specific surface area was measured by using nitrogen adsorption (BET) and electrical conductivity was measured with four-probe method. It was found that with extremely high RC ratio, the porous structure of RF and carbon aerogel films can be controlled from micro to macro porous at ambient conditions. With respect to the application as electrodes for fuel cells, carbon aerogel films with different porous structures on the two surfaces have been also obtained through optimizing the sol-gel process.     

含二羟基二苯酮热致液晶共聚酯的合成与表征（Ⅵ）──含二羟基二苯酮热致液晶共聚酯结晶结构的X射线衍射研究

以广角Ｘ－射线衍射（ＷＡＸＤ）对含二羟基二苯酮（ＢＨＰ）、对羟基苯甲酸（ＰＨＢＡ）、对苯二甲酸（ＴＰＡ）、问苯二酚（ＲＥＳ）的系列热致液品共聚酯进行了较为深入的研究，详细讨论了不同组成的共聚酯的结晶结构、结晶度、结晶颗粒大小等等。     

希土冠醚配合物的研究 ⅩⅣ.镧系硝酸盐与2,3,14,15-四苯基-1,4,7,10,13,16,19,22-八氧-环廿四-2,14-二烯配合物的合成及性质研究

自Pedersen首先发现大环聚醚对碱金属和碱土金属离子的特殊配位作用以来,人们相继合成了一系列不同类型的希土冠醚配合物。并研究了它们的性质。     

稀土与甘氨酰－L－亮氨酸的配位作用

用ｐＨ电位法测定了生理条件下（３７℃，Ｉ＝０．１５ｍｏｌ／Ｌ）和２５℃，Ｉ＝０．１０ｍｏｌ／Ｌ时甘氨酰－Ｌ－亮氨酸的质子化常数及其稀土配合物稳定常数，结果表明稀土可与该配体形成１：１配合物，并且配合物稳定性呈现明显“四分组效应”。讨论了钇的位置以及肽键对配合物稳定性的影响。     

稀土环己烷酸配合物合成及振动光谱研究

The solid state complexes of trivalent lanthanid, yttrium and scandium with cyclohexane carboxylic acid have been isolated and characterized by IR and Raman spectroscopy. It was found that there are only chelated carboxylate groups in the scandium complex and that there are the chelated, bridged and chelate-bridged carboxylate groups in other rare earth complexes. The former is a mononuclear complex and the latter is a polynuclear polymer. The RE—O coordinate bonds possess the characters of convalent ionic bond.     

偏最小二乘（PLS）分光光度法同时测定镉,汞,铅

本文研究了溴化十六甲铵基（ＣＴＭＡＢ）存在时，ｍｅｓｏ－四（４－磺酸苯基）卟啉（ＴＰＰＳ４）与Ｃｄ（ＩＩ），Ｈｇ（ＩＩ），Ｐｂ（ＩＩ）在室温下发生高灵敏度的显色反应条件以及应用偏最小二乘（ＰＬＳ）法同时测定三组分的方法。由微型计算机处理实验数据可心到三组分的浓度，本文还定义了未知样品与标准样之间的相关系数Ｑｒ，通过Ｑｒ值的大小预报未知样测试结果的准确性，利用此法可以提高测定速度，可靠性和选择性。     

Immunoassay utilizing biochemistry reaction product via surface-enhanced Raman scattering in near field

In recent years, surface-enhanced Raman scattering (SERS) has been a topic of keen interest with regard to the detection of trace biological materials[1―8]. A wide range of SERS studies aimed at investigating structure, topology, and composition of biome…     

CO2加氢生成醋酸的研究

ＣＯ２加氢生成醋酸的研究范宾张成芳陆岗俞丰倪燕慧（华东理工大学化工工艺研究所，上海２００２３７）关键词二氧化碳加氢，醋酸，铑催化剂关于ＣＯ２加氢直接生成醋酸，国内外学者研究得很少，日本的Ｎｏｒｉｇｕｋｉ报道了［１］在ＣＯ２催化加氢反应中有少量醋...     

ON SELF-ABSORPTION CORRECTION IN EXCIMER FLUORESCENCE MEASUREMENTS OF POLYMER SOLUTIONS

The effect of self absorption on the ratio of excimer to monochromophore emission intensities, I_e/I_m, has beenexplored by experimentally changing the solution layer thickness of the emission light path traversed in the solution in theright-angle geometry. The result shows that data obtained by front-face geometry are better than those obtained by right-angle geometry even after correction to zero solution thickness. The correction formula based on geometric optics given byTsai and Torkelson is not adequate.