β-环糊精联吡啶钌衍生物与维生素包络作用的荧光光谱分析

合成了一种新型的β-环糊精联吡啶钌衍生物[β-CD-Ru(bpy)3],采用分子荧光光谱法研究了该衍生物对一系列维生素的包络作用.β-CD-Ru(bpy)3的结构中含有发光活性基团联吡啶钌中心,因此具有良好的荧光特性.当加入与β-环糊精有主客体识别作用的维生素时,β-CD-Ru(bpy)3与维生素之间发生能量转移从而导致主体分子发生荧光猝灭.采用Benesi-Hildebrand方程,根据其猝灭值计算了该衍生物与各种维生素的包络常数.实验结果表明,维生素与β-CD-Ru(bpy)3包络作用大小顺序为维生素B12>维生素K3>维生素C>维生素A.     

HQ—105光电测距仪光学系统设计

注入式半导体激光器与注入PN极的电流不同,可有两种工作状态:相干状态发射激光和非相干状态发射激光。它具有体积小、重量轻、效率高、易调制、调制-辐射特性好、结构简单等很多优点。这为小型相位式精密光电测距仪提供了一个较为理想的光源。目前,在测距领域内广泛使用的是非相     

Efficient implementation of x-ray ghost imaging based on a modified compressive sensing algorithm

Towards efficient implementation of x-ray ghost imaging (XGI), efficient data acquisition and fast image reconstruction together with high image quality are preferred. In view of radiation dose resulted from the incident x-rays, fewer measurements with sufficient signal-to-noise ratio (SNR) are always anticipated. Available methods based on linear and compressive sensing algorithms cannot meet all the requirements simultaneously. In this paper, a method based on a modified compressive sensing algorithm with conjugate gradient descent method (CGDGI) is developed to solve the problems encountered in available XGI methods. Simulation and experiments demonstrate the practicability of CGDGI-based method for the efficient implementation of XGI. The image reconstruction time of sub-second implicates that the proposed method has the potential for real-time XGI.     

Heck Reaction of Iodoarenes with Methyl Acrylate Catalyzed by Cyciopalladated Complexes of Tertiary Arylamines Immobilized in Ionic Liquid[ Bmim ] ^＋ BF4^-

Heck reaction of iodoarenes with methyl acrylate, catalyzed by cyclolmlladated complexes of tertiary arylamines, was investi-gated in ionic liquid 1-butyl-3-metylimidazolium tetratluorobo-rate ([Bmim] BF4^- ). The products can be isolated convenient-ly from the ionic liquid-catalyst system. The catalysts could be reused for more than 10 times still with satisfactory catalytic ac-tivity.     

Homocoupling of Aryl Iodides Catalyzed by Cyclopalladated Complexes of Tertiary Arylamines

Homocoupling of aryl iodides catalyzed by cyclopalladated complexes of tertiary arylamines gives symmetric biaryls with good yields in DMA or ionic liquid [Bmim]BF4. This catalytic alternative of the Ullmann reaction has proved to be sensitive to both electronic and steric factors of substrates.     

寓能力培养于工程力学的教学过程中

研究了工科类专业工程力学教学中的能力培养问题。结合实例，介绍所采取的举措要点     

Immobilization of Pd(II) Catalysts for Cyclopropanation in Ionic Liquid

Ｈｏｍｏｇｅｎｅｏｕｓｃａｔａｌｙｓｉｓｏｆｆｅｒｓｍａｎｙａｄｖａｎｔａｇｅｓｏｖｅｒｈｅｔｅｒｏｇｅｎｏｕｓｃａｔａｌｙｓｉｓｗｉｔｈｒｅｓｐｅｃｔｔｏａｃｔｉｖｉｔｙ ,ｓｅｌｅｃｔｉｖｉ ｔｙ ,ｆｌｅｘｉｂｉｌｉｔｙｏｆｏｐｅｒａｔｉｏｎ .Ｈｏｗｅｖｅｒ ,ｔｈｅｃｏｎｔｉｎｕｏｕｓｃａｔ ａｌｙｓｔｃｏｎｓｕｍｐｔｉｏｎ ,ｃａｔａｌｙｓｔｒｅｍｏｖａｌｆｒｏｍｔｈｅｐｒｏｄｕｃｔｓａｎｄｃａｔａｌｙｓｔｄｉｓｐｏｓａｌｈａｖｅｓｔｉｌｌｔｏｂｅｉｍｐｒｏｖｅｄ .Ａｎａｔ ｔｒａｃｔｉｖｅａｐ…     

酶联免疫法草甘膦自动检测仪的研制

研发一种采用竞争性免疫法检测水中草甘膦的自动检测系统。该系统包括定量进样、清洗、反应/检测、系统控制等模块。采用微流芯片、微量注射泵进行各种试剂的定量,避免交叉污染,采用三维运动机械臂进行各个加样位点的精确定位及加样,并与酶联免疫检测方法结合,设计得到一种能够自动检测水中草甘膦含量的仪器。仪器检测精密度为9.6%,检出限为0.078μg/L.用该仪器对实际水样进行对比测试,测试结果与标准方法相比,其相对误差在±16%以内。该仪器具有检测灵敏度高,试剂用量少,操作简单等优点。     

α-异丙基对卤苯乙酸拆分方法的改进

α-甲基苄胺;α-异丙基对卤苯乙酸拆分方法的改进     

交叉羰基还原偶联法合成二茂铁基二芳基乙烯衍生物

通过低价钛引起的交叉羰基的偶联合成了二茂铁基二芳基乙烯衍生物,原料廉价易得,合成步骤简便,产率达７４％。