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Effect of Electrostatic Interactions on Metallophthalocyanine Single Molecular Arrays with n-Octadecyl Mercaptan Templates

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Abstract:

By changing central metal ions or by tuning the length of substituted alkyl chains, metallophthalocyanines or their derivatives exhibit various assembling behaviors when co-adsorbed with n-octadecyl mercaptan on highly oriented pyrolytic graphite surfaces. Repeated scanning tunneling microscopy experiments demonstrate that planar or short alkyl chain substituted MPcs could form single molecular arrays while phase separation occurred when non-planar or longer alkyl chain substituted MPcs were co-adsorbed with C18SH templates. The experimental results combined with the density functional theory calculations reveal that intermolecular electrostatic and van der Waals interactions play essential roles in the formation of single molecular arrays.

Keywords: DENSITY FUNCTIONAL THEORY; METALLOPHTHALOCYANINE; SCANNING TUNNELING MICROSCOPY; SINGLE MOLECULAR ARRAY

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2009.C108

Publication date: February 1, 2009

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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