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Novel coordination chemistry-based multilayers can be self-assembled by alternate immersion of amine-functionalized substrates in CoCl2 and 1,4-diisocyanobenzene (DiCNB) solutions. Resulting multilayers show uniform film growth with increasing number of Co−DiCNB layers. This system provides alternative chemistry to silane-based, carboxylate or metal−bis(phosphonate) multilayer self-assembly, expanding the potential properties and applications of multilayer thin films.

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Progress has been made towards the development of inorganic-organic multilayered films modeled after Hofmann clathrate compounds. Cobalt-bipyridine multilayers were grown layer by layer on a silicon substrate. The resulting films were characterized using ellipsometry, grazing angle X-ray diffraction, Auger electron spectroscopy and EPMA (Electron Probe Micro- Analysis). Results indicate that moderately well ordered layers have been synthesized, but cross-linking with M(CN)42(M = Ni, Pd, or Pt) to simulate the model structure does not significantly occur.