A non‐gassing electroosmotic pump with sandwich of poly(2‐ethyl aniline)‐Prussian blue nanocomposite and PVDF membrane

Low voltage, non‐gassing electroosmotic pump (EOP) was assembled with poly(2‐ethyl aniline) (EPANI)‐Prussian blue nanocomposite electrode and commercially available hydrophilic PVDF membranes. The nanocomposite material combines excellent oxidation/reduction capacity of EPANI with exceptional stability by shuttling of proton between Prussian blue nanoparticles and EPANI redox matrix. The flow rate was highly dependent on the electrode composition but it was linear with applied voltage. The flow rate at 5 V for different nanocomposite, EPANI, EPANI‐A, EPANI‐B, and EPANI‐C were 127.29, 187.41, 148.51, and 95.47 µL/min cm², respectively, which increases substantially with increase in the Prussian blue content. The obtained best electro osmotic flux was 43 µL/min/V/cm² for EPANI‐A. It was higher than most of the EOP assembled using polyquinone and polyanthraquinone redox polymers. The assembled EOP remained exceptionally stable until the electrode charge capacity was fully utilized. The best EOP produces a maximum stall pressure of 1.2 kPa at 2 V. These characteristics make it suitable for a variety of microfluidic/device applications.     

水溶性苯胺蓝光度法测定蛋白质

在pH1．0～2．3的酸性介质中,水溶性苯胺蓝与牛血清蛋白、人血清蛋白、卵白蛋白、α-糜蛋白酶作用形成结合产物时将导致溶液光吸收发生变化,在558nm褪色,在634nm附近吸光度增强,且吸光度差(△A)值均与蛋白浓度成正比,不同蛋白质分别在0～50mg／L或20～80mg／L范围内符合比耳定律。据此,建立了一种新的光度测定蛋白质的新方法。它用于人血清和尿液样品中总蛋白质的质量测定,回收率在95％～102％之间,结果满意。     

光催化与光化学联合降解苯胺

水中许多难于被其它方法降解的有机污染物（例如卤代烃、表面活性剂、多氯联苯、染料等）能在ＴｉＯ２的光催化作用下发生矿物化的降解反应,被氧化为ＣＯ２、Ｈ２Ｏ等简单的无机物,对环境不会带来二次污染［１～３］．近年来有关ＴｉＯ２纳米晶（或微晶）膜的制备与光催...     

Synthesis of indolines and tetrahydroquinolines fromortho-(alk-2-enyl)anilines

Intramolecular cyclization ofo-alkenylanilines was studied. Heating ofo-(cyclopent-2-en-1-yl) arylammonium chlorides at 200–220 °C yields cyclopenta[b]indolines as the main reaction products. Cyclization of 4-methyl-2-(pent-3-en-2-yl)aniline under the same conditions gave a mixture of indolines and tetrahydroquinolines. An alk-1-enylarylamine containing a vinylic double bond does not form cyclization products on the nitrogen atom. Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 5, pp. 975–978, May, 1999.     

Sonochemical synthetic methods to produce functionalized conducting copolymers

Polyaniline (PANI) is one of the most investigated intrinsically conducting polymers. Copolymerization of aniline with aniline derivatives was considered one of the most effective and promising ways of improving the properties of PANI. In this work, firstly ethyl 3‐aminobenzoate and butyl 3‐aminobenzoate were synthesized from 3‐aminobenzoic acid by direct esterification. Then the copolymerization of 3‐amino benzoic acid, ethyl 3‐aminobenzoate, and butyl 3‐aminobenzoate with aniline was carried out by sonochemical polymerization in aqueous hydrochloric acid using ammonium persulfate (APS) as an initiator. The effects of variation in the molar ratio of the two monomers on chain structure, conductivity, and the redox properties of the copolymer are discussed. The prepared polymers are characterized by ¹H NMR spectroscopy, X‐ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT‐IR). Thermal behavior of the prepared copolymers was studied by differential scanning calorimetry. The copolymers were doped with HCl and their conductivity was measured. Copyright © 2009 John Wiley & Sons, Ltd.     

NaY 分子筛超笼内离子液体和金属配合物自组装制备溶剂分子和金属配合物一体化催化剂

 采用自组装-瓶中造船法在 NaY 分子筛超笼内, 将溴化 1-癸基-3-甲基咪唑离子液体和邻菲罗啉钯组合成一体化催化剂, 并用于苯胺羰化反应. 结果表明, 相对于以离子液体为溶剂, 邻菲罗啉钯配合物/NaY 分子筛为催化剂的体系, 该一体化催化剂在离子液体和邻菲罗啉钯配合物用量显著降低的条件下, TOF 可达 23 000 h?1, 而相应均相催化剂体系的 TOF 仅为 3 060 h-1.     

Reduction of Nitrobenzene to Aniline with Carbon Monoxide and Water in the Presence of the PdCl2/Fe/I2 System

A study of modified catalyst systems composed of palladium or its chloride and a co-catalyst such as metallic Fe-powder, iodine, and pyridine was used in the reduction of nitrobenzene to aniline with carbon monoxide and water at 180°C and 2.5-4 MPa pressure. The reaction is complete in 2 h with a nitrobenzene conversion of 98-100% and a 100% selectivity with respect to aniline.     

CATALYTIC HYDROGEN TRANSFER OVER MAGNESIA, XVII. a HYDROCARBONS AS HYDROGEN DONORS

Donor activity of cyclohexene and a series of n-alkanes in catalytic hydrogen transfer to various organic groups over magnesia as a catalyst has been determined. Styrene, phenylacetylene, benzaldehyde and acetophenone were not reduced by cyclohexene in the temperature range 523-673 K. Cyclohexene oxide was reduced to cyclohexanol (38%) and nitrobenzene to aniline (56%) by cyclohexene under adopted conditions (673 K). The highest yield of aniline (57%) from nitrobenzene was reached at 673 K in the presence of n-decane from a series of C6 - C16 n-alkanes used as hydrogen     

固相萃取/液相色谱-串联质谱法测定水中苯胺类化合物及基质干扰的消除

建立了固相萃取/液相色谱-串联质谱检测水中18种苯胺类化合物的分析方法,并优化了固相萃取和色谱条件。水样经混合型阳离子交换柱(MCX)或硅胶基体阳离子交换柱(SCX)富集后,用氨水甲醇溶液洗脱,用超纯水适当地稀释后,用液相色谱-串联质谱法测定。以ODS柱为分离柱,甲醇-0.005%(v/v)甲酸水溶液为流动相,梯度洗脱,多反应监测模式分析,内标法定量。18种苯胺类化合物的分析时间在15 min之内。采用MCX柱萃取时,16种苯胺化合物的方法检出限为0.002~0.035 μ g/L,地表水样品的加标回收率为72.5%~92.5%,相对标准偏差为1.4%~9.6%;采用SCX柱萃取时,17种苯胺类化合物的方法检出限为0.013~0.207 μ g/L,地表水样品的加标回收率为66.5%~102%,相对标准偏差为2.4%~13.6%。本实验还考察了消除基质干扰的5种方法,结果表明,调整色谱分离条件是最有效的方法,其次是选择合适的前处理方法。更换离子源、内标法定量和利用基质标准溶液校正也可在一定程度上消除或补偿基质干扰。     

缩酮胺合锌催化二氧化碳和氧化环己烯共聚

二氧化碳作为单体与环氧化物的共聚反应近年来越来越受到重视 .该反应不经过高耗能的还原过程 ,二氧化碳利用率高 ,所得到的产物聚碳酸酯在塑料、弹性体、涂料、胶粘剂、食品包装材料和生物降解材料等方面有广泛的应用 .二氧化碳与氧化环己烯的交替共聚物聚碳酸亚环己酯玻璃化转变温度较高 (Ｔｇ 为 1 2 0℃ ) ,热分解温度达 2 1 0℃以上[1] ,是一种性能优良的高分子材料 .Ｃｈｅｎｇ等于 1 998年首次报道了一种缩酮胺合锌催化剂[2 ] .它是由 β 二酮 (乙酰丙酮 )与 2 ,6 二异丙基苯胺为原料合成的 ,具有西佛碱结构 ,用于二氧化碳与氧化环己…