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Intercalation and Stitching of Graphite Oxide with Diaminoalkanes Margarita Herrera-Alonso, Ahmed A. Abdala, Michael J. McAllister, Ilhan A. Aksay, and
 

Summary: Intercalation and Stitching of Graphite Oxide with Diaminoalkanes
Margarita Herrera-Alonso, Ahmed A. Abdala, Michael J. McAllister, Ilhan A. Aksay, and
Robert K. Prud'homme*
Department of Chemical Engineering, Princeton UniVersity, Princeton, New Jersey 08544
ReceiVed June 7, 2007
The intercalation reaction of graphite oxide with diaminoalkanes, with the general formula H2N(CH2)nNH2 (n )
4-10), was studied as a method for synthesizing pillared graphite with tailored interlayer spacing. Interlayer spacings
from 0.8 to 1.0 nm were tailored by varying the size of the intercalant from (CH2)4 to (CH2)10. X-ray diffraction and
infrared spectroscopy were used to confirm intercalation, and the frequency of the CH2 stretch confirmed that the
intercalants are in a disordered state, with an important contribution from the gauche conformer. Sequential intercalation
of diaminoalkanes followed by dodecylamine demonstrated the inability of these "stitched" systems to undergo
expansion along the c-direction, indicative of cross-linking. Finally, the reaction of graphite oxide with diaminoalkanes
under reflux and for extended periods (>72 h) resulted in the chemical reduction of the graphite oxide to a disordered
graphitic structure.
Introduction
Intercalation of organic molecules in the gallery spacing of
layered materials is a common modification technique since the
simplicity of these reactions allows facile control over the
chemical and physicochemical characteristics of the derivatives.1
An example of the applicability of this method is in the fabrication

  

Source: Aksay, Ilhan A. - Department of Chemical Engineering, Princeton University

 

Collections: Materials Science