Asymmetric Response toward Molecular Fluorination in Binary Copper鈥揚hthalocyanine/Pentacene Assemblies

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• 作者：D. G. de Oteyza ; J. M. Garcia-Lastra ; E. Goiri ; A. El-Sayed ; Y. Wakayama ; J. E. Ortega
• 刊名：Journal of Physical Chemistry C
• 出版年：2014
• 出版时间：August 14, 2014
• 年：2014
• 卷：118
• 期：32
• 页码：18626-18630
• 全文大小：367K
• ISSN：1932-7455

文摘

We report a didactic and simple example of the subtleness in the balance of intermolecular and molecule鈥搒ubstrate interactions and its effect on molecular self-assembly. The study is performed on two closely related molecular blends of copper phthalocyanines and pentacene, in each of which one of the two molecules is fluorinated. Reversing the fluorination brings about changes in the intermolecular hydrogen bonds, as well as in the interactions with the substrate. As a result, on Au(100) substrates one blend assembles into a crystalline structure, whereas the other, displaying weaker intermolecular interactions and a larger corrugation in the molecule鈥搒ubstrate interaction potential, results in a disordered layer. However, the difference between the two blend鈥檚 structures vanishes when substrates with less corrugated interaction potentials are used.