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The growth and ordering of copper-substituted and free-base 2,9,16,23-tetra- tert -butyl-phthalocyanine on a graphite surface at the solution−solid interface can be controlled by solvent choice. One-dimensional ordered molecular layers having the molecular plane lying parallel to the graphite substrate were obtained at the octylbenzene solution−graphite interface at room temperature. The arrangement was changed to two different two-dimensionally ordered lattices by replacing the solvent with bromine-substituted octylbenzenes. The free base and copper complexes gave the same surface structures in octylbenzene and in 1-bromo-4- n -octylbenzene, indicating that the central metal ion was not playing a critical role in determining the surface structure. These structures were determined from the analysis of the images with scanning tunneling microscopy.
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Takami et al. (2009) studied this question.
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