K W Hipps - A Self-Organized Two-Dimensional Bimolecular Structure

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  Publication Details (including relevant citation   information):

  Scudiero, L., Hipps, K. W., Barlow, Dan E. The Journal of   Physical Chemistry B 2003 107 (13)   2903-2909

  Abstract: The production of a novel   two-dimensional bimolecular surface structure using weak   noncovalent interactions is demonstrated and observed by scanning   tunneling microscopy (STM). This work follows closely the   three-dimensional ideas of crystal engineering and applies the   concepts of supramolecular synthons to molecular systems   constrained to two dimensions by physisorption on a conducting   surface. We demonstrate a well-ordered planar structure that   self-assembles through the influence of fluorine−phenyl   interactions. This study provides a concrete example of the   systematic design of self-organized layers. Fully fluorinated   cobalt phthalocyanine (F16CoPc) thermally deposited onto gold is   characterized by RAIRS, XPS, and STM. UPS spectra of thin films   of CoPc, F16CoPc, and nickel tetraphenylporphyrin (NiTPP) on gold   are reported and their relative surface charges are compared. STM   images of single molecular layers of F16CoPc, NiTPP, and mixtures   of NiTPP with F16CoPc and of NiTPP with CoPc are also presented.   While NiTPP/F16CoPc spontaneously forms a well-ordered 1:1   structure, NiTPP/CoPc forms a two-dimensional solid solution.

  Address (URL): http://dx.doi.org/10.1021/jp026875c