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    Macroscopic expansion of tetraphenylporphyrin Langmuir layers stimulated by protonation

    Year: 2012

    Journal: Soft Matter, 2012, 8 (10), 2807-2811, 20131009

    Authors: S. A. Brittle, A. Flores, A. Hobson, A. J. Parnell, A. D. F. Dunbar, C. A. Hunter, T. H. Richardson

    Organizations: Department of Physics, University of Sheffield, Hicks Building, Hounsfield Road, Sheffield, UK; Department of Chemical and Biological Engineering, University of Sheffield, Mappin Street, Sheffield, UK; Department of Chemistry, University of Sheffield, Dainton Building, Brook Hill, Sheffield, UK

    We report the relationship between the degree of areal expansion of floating Langmuir layers of tetraphenylporphyrins and their molecular structure, and show that their realisable expansion depends on the ratio of their experimental area per molecule (footprint) in the unexpanded film to their modelled molecular area when in the flat, face-down configuration in which the plane of the porphyrin ring is parallel to the plane of the water surface.