Two-Dimensional Phase Behavior of a Bimolecular Porphyrin System at the Solid−Vacuum Interface

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• 作者：Nikolai Wintjes ; Jorge Lobo-Checa ; Jens Hornung ; Tom Samuely ; Franois Diederich ; Thomas A. Jung
• 刊名：Journal of the American Chemical Society
• 出版年：2010
• 出版时间：June 2, 2010
• 年：2010
• 卷：132
• 期：21
• 页码：7306-7311
• 全文大小：229K
• 年卷期：v.132,no.21(June 2, 2010)
• ISSN：1520-5126

文摘

The “in vacuo” self-assembly of a two-component porphyrin system on a metal surface is studied by means of scanning tunneling microscopy in the sub-monolayer regime. The observed self-assemblies are systematically analyzed by their dependence on the total coverage and on the ratio of the two components resulting in a two-dimensional phase diagram. In a small region within the parameter space, a mixed surface layer is observed. The results are discussed consistently on the basis of molecule−surface and molecule−molecule interactions as well as thermodynamic aspects, leading to a qualitative comprehension of the phase behavior of the two-dimensional bimolecular system.