نتایج جستجو برای: dicationic 4

تعداد نتایج: 1303925  

Journal: :Catalysts 2021

Wettability is an important factor affecting the performance of catalytic oxidative desulfurization. In order to develop efficient catalyst for extractive coupled desulfurization (ECODS) fuel oil by H2O2 and acetonitrile, a novel family imidazole-based polyoxometalate dicationic ionic liquids (POM-DILs) [Cn(MIM)2]PW12O40 (n = 2, 4, 6) was synthesized modifying phosphotungstic acid (H3PW12O40) w...

Journal: :Current Research in Green and Sustainable Chemistry 2021

Journal: :Organic & biomolecular chemistry 2009
Hidetoshi Taima Naoki Yoshioka Hidenari Inoue

A series of mono-, di-, tetra- and hexacationic esters of pyropheophorbide a/b have been designed and synthesized to explore the intercalation of their phorbine ring between the base pairs of double-helical DNA and the influence of their peripheral substituents on the DNA interactions. Mono-(1), di-(2, 3) and tetra-(4, 5) cationic pyropheophorbides are soluble as an oligomeric aggregate in HEPE...

Journal: :Organic & biomolecular chemistry 2013
Francesca D'Anna H Q Nimal Gunaratne Giuseppe Lazzara Renato Noto Carla Rizzo Kenneth R Seddon

A new class of functionalised dicationic ionic liquids, containing a central cationic unit capped by a basic functionality (imidazole), has been synthesised. These salts have been characterised in isotropic solution using proton and 2D-NMR spectroscopy, and their thermal stability has been studied by DSC and TGA. All these novel salts contain the 1-(1-imidazolylmethyl)-3,5-di{1-(3'-octylimidazo...

2011
João A. S. Almeida Henrique Faneca Rui A. Carvalho Eduardo F. Marques Alberto A. C. C. Pais

Dicationic alkylammonium bromide gemini surfactants represent a class of amphiphiles potentially effective as skin permeation enhancers. However, only a limited number of studies has been dedicated to the evaluation of the respective cytotoxicity, and none directed to skin irritation endpoints. Supported on a cell viability study, the cytotoxicity of gemini surfactants of variable tail and spac...

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