Switching and tuning processes in the interaction of protons with ferrocenyl amines
摘要:
Some new ferrocene-functionalized amines have been synthesized and characterized. Electrochemical and potentiometric studies have been carried out in THF:H2O (60:40 v/v) to determine protonation constants of the oxidized and "reduced" species and the oxidation potential shift between pH acid and basic. Some electrochemical studies have also been performed in CH2Cl2:MeOH mixtures, The change in the acidity properties after oxidation and the related redox potential shift after protonation are discussed. (C) 1998 Elsevier Science Ltd.
Phosphorus-Nitrogen Compounds: Part 25. Syntheses, Spectroscopic, Structural and Electrochemical Investigations, Antimicrobial Activities, and DNA Interactions of Ferrocenyldiaminocyclotriphosphazenes
The condensation reactions of hexachlorocyclotriphosphazene (N3P3Cl6) with mono (1 and 2) and bisferrocenyldiamines (3-5 and 7) resulted in the formation of tetrachloro mono- (8 and 9) and bisferrocenylspirocyclotriphosphazenes (10-13). In addition the tetramorpholino mono- (8a and 9a) and bisferrocenylphosphazenes (10a-12a) were obtained from the reactions of the corresponding tetrachlorophosphazenes (8-12) with excess morpholine. The structures of all the phosphazenes were determined using FTIR, MS, H-1, C-13, and P-31 NMR and 2-dimensional NMR techniques. The structures of 9a and 13 were determined by single crystal X-ray diffraction techniques. Cyclic voltammetric investigations of compounds 8a, 9a, and 11a revealed that ferrocene redox centers undergo reversible oxidation. These ferrocenylphosphazenes appear to be quite robust electrochemically. Interactions between the compounds 8a, 9a, 11a, and 12a and pBR322 plasmid DNA were investigated by agarose gel electrophoresis. [Supplementary materials are available for this article. Go to the publisher's online edition of Phosphorus, Sulfer, and Silicon and the Related Elements for the following free supplemental files: Additional text and figures.]