冠醚-CuI混合催化剂的组份对溴代雌甾的亲核取代反应的影响

冠醚能与碱或盐的阳离子络合,从而使阴离子在非质子溶剂中成为“裸阴离子”,具有特别强的亲核性或硷性,所以在有机合成中获得广泛的应用。为了探求冠醚的应用范围,同时寻求一种既简便又宜于较大量制备雌甾甲氧基衍生物的方法,作者曾首次将冠醚用于雌甾衍生物的合成,设计了冠醚-亚铜盐混合催化体     

硅钙合金中钙含量的测定

研究了用一氧化二氮-乙炔火焰原子吸收光谱法测定硅钙合金中钙,并对样品消化处理条件和干扰因素进行了综合考虑.该法灵敏度高、步骤简单,操作容易掌握,干扰少等特点.其相对标准偏差均小于1.0%(n=6).加标回收率均为97.0%-100.0%范围内,本法完全达到了仪器分析质量与质量控制要求.     

基于双氨基三唑硫醚为中性载体的汞离子选择性电极的研究

研制了基于双氨基三唑硫醚为中性载体的阳离子选择性电极。实验表明,该电极对Hg2 具有良好的电位响应特性,在pH 2.0硝酸盐缓冲液中,电极电位呈近能斯特响应,线性响应范围为4.0 mg/L~20 g/L,斜率为33.4 mV/dec.(25℃),检出限为1.7 mg/L。该电极响应时间短(<10 s),pH范围较宽(1.3~3.3)。将该电极用于实际水样和二元混合溶液中Hg2 的检测,其结果令人满意。     

聚对苯乙炔MOPPV/ZnSe量子点复合材料太阳电池性能研究

基于量子点材料的特殊物理性能和量子点聚合物复合材料高的光电转换性能, 本文在MOPPV溶液中制备了粒度可控、 结晶性好、颗粒尺寸约为3.75 nm的ZnSe量子点材料, 最终获得不同质量比的MOPPV/ZnSe复合材料. 分别使用X射线衍射、透射电子显微镜、紫外可见吸收光谱等研究其特性结果表明MOPPV与ZnSe量子点可以有效地复合且发生光诱导电荷转移; 通过对MOPPV、ZnSe和MOPPV/ZnSe复合材料太阳电池性能的研究发现, 与MOPPV和ZnSe单体相比复合材料光伏特性呈现增加的趋势, 并且复合材料光电性能随着ZnSe量子点材料质量浓度的增加呈现先增大后减小的现象, 当MOPPV和ZnSe的质量比为1:1时, 其转换效率最大, 开路电压为0.516 V, 短路电流为2.018 mA, 填充因子为25.53%, 转换效率为0.167%. 关键词： 量子点 复合材料 伏安特性     

Study on the optical properties of 4,4'-bis-(2-(substituted-styryl))biphenyl and 1,4-bis-(2-(substituted-styryl))benzene

The maximum absorption wavelengths (lambda(a-max)), absorption coefficient (epsilon), maximum emission wavelengths (lambda(e-max)), fluorescent quantum yields (phi(f)), and second-order nonlinear polarizations (beta(xxx)) of seventeen 4,4'-bis-(2-(substituted-styryl))biphenyl and three 1,4-bis-(2-(substituted-styryl))benzene were measured. The results showed that some of this series of compounds possess high fluorescent quantum yields in DMF, such as, 2 (0.801), 3 (0.680), 5 (0.565), 15 (0.538) 16 (0.848), 18 (2.175), 19 (1.314) and 20 (1.060), as compared with quinine-sulfuric acid. They could be used as fluorescent whiteners and fluorescent colorants. Some of these compounds were of a high beta(xxx) values, such as in DMSO, 2 (29.00/10(-30) m(5)c(-1)), 3 (25.29/10(-30) m(5)c(-1)), 8 (21.79/10(-30) m(5)c(-1)) and 9 (24.08/10(-30) m(5)c(-1)). Electron-withdrawing substituent NO(2), which is attached to the two terminal phenyl rings could cause lambda(a-max) obviously to be shorter, but it made lambda(e-max) change longer. Electron-donating substituent at two end benzene rings, such as OCH(3), N((CH(3))(2)), even Cl, could make lambda(a-max) and lambda(e-max) longer, and the larger the electron-donating ability of the substituent, the longer the lambda(a-max) and lambda(e-max). This influence of 4-position substituent on lambda(a-max) or lambda(e-max) is obviously larger than that of 2-position substituent, and the action of substituent on 2-position is larger than that of substituent on 3-position. The values of lambda(a-max) and lambda(e-max) of biphenyl compounds 2 or 3 were respectively close to these values of corresponding benzene compounds 18 or 19.     

乙烯聚合水杨醛亚胺锆配合物的合成、结构和固定化

合成和表征了2个锆的配合物：Bis[N-(3-tert-butylsalicylidene) allylaminato] zirconium dichloride (4)和Bis[N-(3-tert-butylsali-cylidene)-iso-butylaminato] zirconium dichloride (5)，并且得到了配合物4的单晶结构。在引发剂的作用下，配合物4和苯乙烯进行自由基共聚，得到高分子化催化剂6。在助催化剂MMAO的存在下，4，5和6都可以催化乙烯聚合。最高活性为3.7×10⁶ g PE·(mol Zr)^-1·h^-1。     

Signal-to-Noise Ratio in Bistable System Subject to Signal and Monochromatic Noise

Signal- to-noise ratio (SNR) of stochastic resonance under white noise is smaller than thatproduced by linear filter under the same condition. For bistable system acted by signal ofproper strength and equal-frequency (monochromatic) noise in certain range, the outputSNR can be greater than that of the linear system under the same condition. Therefore, itcan provide a method superior to linear filter of acquiring signal from noise.     

原子吸收光谱法测定醋酸纤维素膜中铁

用Air-C2H2火焰原子吸收光谱法测定银锌电池醋酸纤维素膜中铁含量.介绍了样品的消化处理条件和铁最佳测定条件,铁浓度0-10μg/mL范围内呈良好线性关系.该方法的灵敏度好,准确度与精密度均能满足银锌电池研制工作的要求.测定样品中铁含量相对标准偏差均小于1.0%(测定次数n=6).标准加入回收率均在97.3%-98.0%(n=6)范围.适用于银锌电池醋酸纤维素膜中铁的测定.     

螯形主体分子的设计、包结性能及其在细辛挥发油 有效成分选择分离中的应用

设计了两种新的具有螯形骨架的主体分子反式-1,2-二苯基-1,2-苊二醇(1)和顺式-1,2-二(1'-萘基)-1,2-苊二醇(2),主体(1),(2)可与许多有机小分子化合物形成配位包合物。用IR和粉末XRD表征了主体分子(1)和(2)的包结物,用^1NMR测定了包结物的主客体分子摩尔比：(1)·DMF(1:2),(1)·DMSO(1:2),(1)·THF(1:2),(1)·二氧六环(1:1),(1)·吡啶(1:1),(2)·DMF(1:1)和(2)·DMSO(1:1)。单晶X射线衍射分析了包结物的晶体结构,(1)·DMF：空间群Pnaa,a=0.9377(1)nm,b=1.4351(1)nm,c=4.0463(3)nm;(1)·DMSO：空间群Pbcn,a=1.6278(1)nm,b=1.0751(1)nm,c=1.4980(1)nm;(2)·DMF：P2~1/n,a=0.9796(1)nm,b=1.2377(1)nm,c=2.2344(3)nm,β=93.02(1)°;游离主体(1)：空间群P1,a=1.0461(1)nm,b=1.1213(1)nm,c=1.5496(1)nm,α=81.74(1)°,β=75.71(1)°,γ=89.00(1)°;分析了主体分子的刚性和柔韧性对包结性能的影响。并研究了主体分子(1)选择分离细辛挥发油,将顺甲基异丁香酚从挥发油中分离出来。     

The Analysis and Research of Ingredients of Fatty Acid in Deep-sea Fish Oil Concentrate and Natural Seal Oil Concentrate

Now deep-sea fish oil and natural seal oil are quite popular in the medicinal market of China, because they are not only to prevent the disease of hypertension, thrombosis, and cardiac symptoms etc, but also to improve immune function.