Amphiphilic analogues of peptidoamines with perfluorinated side chains
摘要:
A new synthetic pathway for preparing perfluorinated p-alanines is described. 2-Perfluoroalkyl-ethanols are oxidized, dehydro-fluorinated, substituted with an azide group and finally hydrogenated with excellent yields. The C-perfluoroalkylated beta -alanines obtained in this way are subsequently used as hydrophobic moieties for the synthesis of amphiphilic lipo-peptides and lipo-peptidoamines. The choice of the peptidoamine structure is justified by the anti-oxidative and complexing properties of natural analogues such as carcinine and cannosine. Measurements of the surface tension of aqueous solutions of the compounds synthesized reveal their surfactant properties. Potentiometric and spectroscopic investigations give evidence for their good ability to complex copper(II) ions in solution. (C) 2001 Elsevier Science B.V. All rights reserved.
Novel proton conducting organic electrolyte containing fluoroalkylated 1,2,3-triazole was synthesized via intramolecular cyclisation of vinyl azides. FT-IR, elemental analysis and NMR methods were used for the characterization of the resulting organic molecule. Triazole containing sample was doped with triflic acid to obtain proton conducting organic electrolytes. Thermal stability of these materials was analyzed with thermogravimetric analysis (TGA) and the melting temperatures were measured by differential scanning calorimetry (DSC). The effect of acid content on the proton conductivity was investigated with impedance spectrometer and the maximum proton conductivity was measured as 10(-2) S/cm at 150 degrees C. (C) 2010 Elsevier B.V. All rights reserved.