jp8b06036_si_001.pdf (2.85 MB)
Selection of Adlayer Patterns of 1,3-Dithia Derivatives of Ferrocene by the Nature of the Solvent
journal contribution
posted on 2018-07-24, 00:00 authored by Prithwidip Saha, Vinithra Gurunarayanan, Vladimir V. Korolkov, Prema G. Vasudev, Ramesh Ramapanicker, Peter H. Beton, Thiruvancheril G. GopakumarUltrathin
films of 2-ferrocenyl-1,3-dithiolane and 2-ferrocenyl-1,3-dithiane
(Fcs), which are chemically inert at ambient conditions, are studied
on the basal plane of highly oriented pyrolytic graphite (HOPG) using
atomic force microscopy (AFM) and scanning tunneling microscopy (STM).
Films are prepared by drop-casting using Fcs dissolved in different
solvents. Films prepared from methanol and dichloromethane show structural
polymorphs on HOPG, while those prepared from ethanol, acetone, and
dimethylformamide show an exclusive selection of one of the polymorphs.
The selection of growth patterns of Fcs shows interesting correlation
to the bulk solubility of molecules in the corresponding solvents
and the solvent boiling point. The growth of Fcs at the submonolayer
coverage is templated by the surface symmetry, and the molecular level
packing on the surface is understood using high-resolution AFM, STM,
and the bulk crystal packing of the molecules.
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basal planepyrolytic graphiteferrocenyldichloromethane showgrowth patternspolymorphFc2-force microscopybulk crystalsubmonolayer coverageAFMAdlayer PatternssolventSTMmoleculeSolvent Ultrathin filmsambient conditionsdimethylformamide showbulk solubilityscanning tunneling microscopysurface symmetryHOPGFilm
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