Phase Behavior of Heptanamide Adsorbed on a Graphite Substrate

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• 作者：Tej Bhinde ; Tamsin K. Phillips ; Stuart M. Clarke ; Thomas Arnold ; Julia E. Parker
• 刊名：Langmuir
• 出版年：2011
• 出版时间：January 4, 2011
• 年：2011
• 卷：27
• 期：1
• 页码：15-18
• 全文大小：780K
• 年卷期：v.27,no.1(January 4, 2011)
• ISSN：1520-5827

文摘

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鈭抯olid 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.