Alkane-Assisted Adsorption and Assembly of Phthalocyanines and Porphyrins

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• 作者：Xiaohui Qiu ; Chen Wang ; Qingdao Zeng ; Bo Xu ; Shuxia Yin ; Hongna Wang ; Shandong Xu ; and Chunli Bai
• 刊名：Journal of the American Chemical Society
• 出版年：2000
• 出版时间：June 14, 2000
• 年：2000
• 卷：122
• 期：23
• 页码：5550 - 5556
• 全文大小：494K
• 年卷期：v.122,no.23(June 14, 2000)
• ISSN：1520-5126

文摘

In this paper it is demonstrated that the stabilizing effect of linear alkanes can be utilized to achievevery high stability in the adsorption and assembly of planar organic molecules on inert surfaces under ambientconditions, by direct deposition from solutions. Using peripherally alkylated phthalocyanines and porphyrinsas the examples, optimal resolutions can be achieved with complex molecular systems. Submolecular featuresof the molecular cores and the interdigitated alkyl parts are clearly visible. Distinctly different packing symmetrieswere also observed and could be attributed to the intermolecular and adsorbate-substrate interactions.Appreciable contrast variations were also recorded with changing bias voltages. This approach could be adaptedto the studies of other molecules to observe submolecular features and could be helpful in obtaining two-dimensional assemblies of monodispersed molecules, especially planar molecules.