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以季鳞盐[Ph2P(CH2OH)2]^ Cl^-与含磺酸根的胺的曼尼希反应合成了水溶性更大的含Ph2PCH2N配位基团的磺酸型膦配体[(Et3NH)2][Ph2PCH2N(CH2CH2SO3)2(2a)和[(Et3NH)2][O3SCH2CH2N(CH2PPh2)CH2CH2N(CH2PPh2)CH2CH2SO3](2b),用NMR、MS、IR等对该膦配体的结构进行了表征。25℃时膦配体2a在水中的溶解度为0.21g/mL,在乙醇中为0.29g/mL。膦配体2b的SO3H与Ph2P的摩尔比较低,在水中溶解度为0.11g/mL,在乙醇中为0.15g/mL。 相似文献
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疏水缔合型水溶性高分子的合成与表征 总被引:3,自引:0,他引:3
本文综述了疏水缔合型水溶性高分子的合成与表征方法,6文中介绿了在合成过程中提高油溶性单体和水溶性单体的混溶性以及疏水基团均匀分布的方法,并了用核磁共振,上光谱等方法测定疏水物含量的方法。 相似文献
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非线性光学材料的设计 总被引:1,自引:0,他引:1
本文在理论与实践、微观与宏观基础上,用分子工程和晶体工程手段对非线性光学材料的优化和筛选进行了系统的设计。对目前研究活跃被认为有前途的非线性光学材料进行了归纳和总结。 相似文献
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2,6-二甲氧基-3-烷基-1,4-苯醌的合成 总被引:1,自引:0,他引:1
取代的1,4-苯醌类化合物广泛存在于自然界的植物和动物体内。其中有一部分已证明具有明显生理活性。最重要的取代1,4苯-醌类化合物是泛醌(ubiquinone)和质体醌(plastoquinone)。它们是动物线粒体呼吸链和植物光合作用链中重要的非蛋白电子载体。2,6-二甲氧基-1,4-苯醌(4)存在于许多植物的树皮和木心中。它的生理作用目前还知道得 相似文献
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在温和的反应条件下,以季Lin盐[Ph2P(CH2OH)2]^ Cl^-与含醚键和有机膦酸根的胺H2O3PCH2N CH2-CH2(OCH2CH2)nNH2(n=1,2,3)的曼尼希反应,高产率合成了含Ph2PCH2N=配位基团的水溶性膦配体,用NMR、MS、IR、UV和光电子能谱等对其结构进行了表征。 相似文献
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金属超分子配合物型非线性光学材料是一类分子基非线性光学材料,具有重要的研究价值和应用前景。本文介绍了包括偶极超分子型、八极超分子型和金属原子簇型非线性光学超分子配合物在内的该类材料国内外的研究进展,对该类材料的组装策略进行了归纳和总结。 相似文献
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本文报道了在手性膦过渡金属配合物催化下,以对溴甲苯与6-甲基-5-庚烯-2-溴化镁(5)经不对称交叉偶联反应合成(R)-(-)-和(S)-(+_)-α-姜黄烯的方法,光学收率分别为44%e.e和50.3%e.e.(R)-(-)-α-姜黄烯经Birch还原得到(R)-(-)-β-姜黄烯.对溴苯甲醚经不对称交叉偶联、Birch还原等反应合成了(S)-(+)-γ-姜黄烯. 相似文献
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光学活性芳族氰醇以及由它转变而成的α-羟基酸、α-羟基酯、α-羟基酮和β-羟基胺等光学活性异构体都是重要的农药和医药中间休,从实用观点看,利用催化不对称合成来制取光活性氰醇,更具有重要意义。近年来,环状二肽Cyclo[L(D)-Phe-L(D)-His]用于催化芳族氰醇的不对称合成,由于具有与D-羟腈酶相类似的高活性和高对映选择性,尤为 相似文献
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A series of novel optically active poly(ester‐imide)s (ter‐PEIs) with high glass transition temperature (Tg), good thermal stability, and solubility were successfully designed and synthesized by direct polycondensation reactions, using p‐hydroxybenzoic acid (PHB), 4,4’‐dihydroxybenzophenone, and a chiral diacid, N,N'‐(pyromellitoyl)‐bis‐L‐phenylalanine diacid as monomers. The resulting terpolymers were characterized by1H‐NMR, FTIR, element analysis, thermogravimetric analysis, different scanning calorimeter and wide‐angle x‐ray diffraction, etc. The ter‐PEIs are amorphous polymers with good heat resistance and high Tgs. They are soluble in many common polar organic solvents and show optically rotation property. The specific rotation values of the ter‐PEIs increase with the molar ratio of the chiral diacid, and the rigid PHB monomer is beneficial to increase the Tgs of the polymers. Copyright © 2013 John Wiley & Sons, Ltd. 相似文献
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Mehdi Barikani Shahram Mehdipour‐Ataei Hamid Yeganeh 《Journal of polymer science. Part A, Polymer chemistry》2001,39(4):514-518
A facile synthesis of an optically active di‐isocyanate containing alkylene groups and a preformed imide structure is described. Polycondensation reactions of the prepared di‐isocyanate with pyromellitic dianhydride, benzophenone tetracarboxylic dianhydride, and hexafluoroisopropylidene diphthalic anhydride resulted in the preparation of optically active, thermally stable polyimides. The prepared monomer and polymers were characterized by conventional methods. Optical and physical properties of the polymers including thermal stability, thermal behavior, solution viscosity, and solubility behavior were studied. © 2001 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 39: 514–518, 2001 相似文献
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Liuyong Shi Xiangtao Zhong Tao Wu Qin Bian Xiaomei Liu Huaqing Miao Yongbo Deng Binfeng Yin Teng Zhou 《Electrophoresis》2022,43(21-22):2175-2183
Due to its characteristics of noncontact, non-damage, high flux, and easy-to-achieve flexible manipulation, optically induced dielectrophoresis (ODEP) technology has been employed to manipulate microspherical biological particles, including separation, enrichment, capture, arrangement, and fusion. However, in nature, biomolecules are morphologically diverse, and some of them are rodlike. In order to illustrate the electrodynamics of rodlike particles under the action of ODEP, a transient multi-physical field coupling model of ODEP chip under the hypothesis of electrical double layer thin layer was established in this paper. The arbitrary Lagrangian–Eulerian method is used to track single-rod particle in the strong coupled flow field and electric field simultaneously. The influence of several key factors, including the applied alternating current (AC) electric voltage, the width of optical bright area, and the initial position of particle, on the trajectory of particle center was analyzed in positive dielectrophoresis (DEP) action and negative DEP action, respectively. Especially, the planar motion process of rodlike particles was discussed together. The research results reveal the electrodynamics behavior of rodlike particles based on the action of ODEP, which may provide theoretical support for the further design of rodlike biological cells manipulation chip based on AC ODEP technology in the future. 相似文献
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BingQinYANG PengHuiYANG AiLinZHU 《中国化学快报》2003,14(9):901-903
A new series of ferrocenesulfonyl benzimidazle has been synthesized and characterized by 1H NMR, FT-IR and elemental analysis. They are expected to have special bio-activity. 相似文献