Journal
CHEMISTRY OF MATERIALS
Volume 18, Issue 17, Pages 4130-4136Publisher
AMER CHEMICAL SOC
DOI: 10.1021/cm060151m
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The paper describes a single-step procedure by which linear terminal diamines are directly anchored onto activated carbon in sizable amounts ( similar to 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.
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