Intercalation and stitching of graphite oxide with diaminoalkanes.
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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.
author list (cited authors)
Herrera-Alonso, M., Abdala, A. A., McAllister, M. J., Aksay, I. A., & Prud'homme, R. K.
complete list of authors
Herrera-Alonso, Margarita||Abdala, Ahmed A||McAllister, Michael J||Aksay, Ilhan A||Prud'homme, Robert K