The paper describes a single-step procedure by which linear terminal diamines are directly anchored onto activated carbon in sizable amounts ( 5%). Evidence for the formation of real amide bonds is provided by using a range of spectroscopic and “in situ” electrochemical determinations (X-ray photoelectron spectroscopy, Brunauer-Emmett-Teller, Fourier transform infrared, Boehm titrations, and potentiometric acid-base titrations). Results on the reaction stoichiometry are also given, showing that diamines and surface carboxyls react in a close to 1:1 molar ratio. Terminal -NH2 groups not engaged in amide bonds are free to react further and, in the present conditions, show well-defined proton adsorption behavior.
Preparation and Characterization of Aminated Carbon from a Single-Step Reaction / M. Longhi, V. Bertacche, C.L.M. Bianchi, L. Formaro. - In: CHEMISTRY OF MATERIALS. - ISSN 0897-4756. - 18:17(2006), pp. 4130-4136.
Preparation and Characterization of Aminated Carbon from a Single-Step Reaction
M. Longhi;V. Bertacche;C.L.M. Bianchi;L. Formaro
2006
Abstract
The paper describes a single-step procedure by which linear terminal diamines are directly anchored onto activated carbon in sizable amounts ( 5%). Evidence for the formation of real amide bonds is provided by using a range of spectroscopic and “in situ” electrochemical determinations (X-ray photoelectron spectroscopy, Brunauer-Emmett-Teller, Fourier transform infrared, Boehm titrations, and potentiometric acid-base titrations). Results on the reaction stoichiometry are also given, showing that diamines and surface carboxyls react in a close to 1:1 molar ratio. Terminal -NH2 groups not engaged in amide bonds are free to react further and, in the present conditions, show well-defined proton adsorption behavior.Pubblicazioni consigliate
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