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Phase Behavior of Heptanamide Adsorbed on a Graphite Substrate

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journal contribution
posted on 04.01.2011, 00:00 by Tej Bhinde, Tamsin K. Phillips, Stuart M. Clarke, Thomas Arnold, Julia E. Parker
In this letter, the phase behavior of a saturated alkylamide, heptanamide (C7), adsorbed on the surface of graphite using synchrotron X-ray diffraction is presented. The diffraction patterns indicate that heptanamide undergoes a solid−solid phase transition in the monolayer at 330 K from pgg symmetry at lower temperatures to p2 symmetry at high temperatures. Other alkylamides with similar carbon chain lengths do not show this phase change, making the C7 homologue unusual.