Liquid-Crystalline Polymorphism of Symmetrical Azobananas: bis(4-(4-alkylphenyl)azophenyl) 2-nitroisophtalates
摘要:
In this paper we present a series of novel compounds, bis(4-(4-alkylphenyl)azophenyl) 2-nitroisophtalates, which exhibit nematic and banana-type liquid-crystalline phases. The alkyl chain length varies from 1 to 18 carbons. The first ten members of this series exhibit nematic phase. The last eleven compounds exhibit banana-type liquid crystalline phases. The propyl and pentyl derivatives have extra second type of banana mesophase.
Synthesis, Biological Study and Complexation Behavior of Some Anionic Schiff Base Amphiphiles
作者:Fatma H. Abdel‐Salam
DOI:10.1007/s11743-010-1206-7
日期:2010.10
adsorption at the interfaces and also micelle formation at lower concentrations. The complexation behavior of the synthesized Schiff bases were study through the interaction of the Schiff base (IIIa; SBSD) with nickel chloride hexahydrate. All synthesized compounds in addition to NiCl2·6H2O and Ni Schiff Base complex have been evaluated for their antibacterial activity against Gram‐positive and Gram‐negative
合成了一系列新型的阴离子席夫碱两亲物。使用不同的光谱学工具阐明了这些化合物的化学结构。使用包括表面和界面张力在内的经典测量方法研究了制备的席夫碱的表面和热力学性质。这些化合物的表面参数,例如表面张力,临界胶束浓度,有效性,效率,最大表面过量,最小表面积和界面活性,显示出良好的表面活性。它们的吸附和胶束化的热力学参数包括胶束化和吸附的自由能变化,表明它们趋于在界面处吸附以及在较低浓度下形成胶束。通过席夫碱(IIIa; SBSD)与六水合氯化镍的相互作用研究了合成席夫碱的络合行为。除氯化镍外的所有合成化合物已对2 ·6H 2 O和Ni Schiff碱复合物对革兰氏阳性和革兰氏阴性细菌的抗菌活性进行了评估。杀生物活性的结果表明(Ni-III a ; Ni-SBSD)复合物比席夫碱IIIa具有更强的作用; SBSD。
Controlling Proton Delivery through Catalyst Structural Dynamics
作者:Allan Jay P. Cardenas、Bojana Ginovska、Neeraj Kumar、Jianbo Hou、Simone Raugei、Monte L. Helm、Aaron M. Appel、R. Morris Bullock、Molly O'Hagan
DOI:10.1002/anie.201607460
日期:2016.10.17
molecular catalysts for H2 production and oxidation emulate components of the active site of hydrogenases. The critical role of controlledstructuraldynamics is recognized for many enzymes, including hydrogenases, but is largely neglected in designing synthetic catalysts. Our results demonstrate the impact of controllingstructuraldynamics on H2 production rates for [Ni(PPh2NC6H4R2)2]2+ catalysts (R=n‐hexyl
Granulated products are provided and include carbonaceous particles and a carbonized agent or binder. The agent or binder is preferably a synthetic resin, pitch component, or mixture thereof. Packing materials for packing columns used in chromatographic separations are also provided as are methods of chromatographic separation using the materials. In addition, methods are provided to provide a variety of different types of carbonaceous products. A variety of chemical groups can be, prior to heat-treatment and/or thereafter, attached to the granules to form modified granules.