Presented is a summary of results in which the purpose of the research was to prepare unique, multi-zonal crystalline composites based upon self-assembled coordination polymers. The ultimate conclusion of the research was that crystals composed of zones of such polymers made up of 4,4'-dithiodipyridine donor units and M(II) hexafluoroacetylacetonate acceptor subunits were produced. Both the relevant copper(II)- and zinc-based polymers were known prior to exist in a helical form. The manganese(II)-based polymer has been shown prior to be helical in form under related, experimental conditions. The helical shape of the constituent polymers originated from the ∼90° <i>cis</i>- nature of the ditopic acceptors and also from the ∼90° C-S-S-C dihedral angle of the ditopic donors. When the metal ("M") was copper, the color was green. When the metal ("M") was zinc, the result was colorless. When the metal ("M") was manganese, the color was yellow-orange. In this research, example composites displaying three and four apparent, primary zoning events are shown. The methodology employed in the synthesis of these systems was that of a seeding and successive-layering mechanism, followed by slow solvent evaporation to crystal growth at each step. Further research will include an assessment of zone purity and the growth of related composites with more zoning events, as well as an investigation into the possibility of using other metals/metal complexes as a basis for the polymers. Microscopic photography of the crystals will be included.

Unique crystalline composites displaying multiple primary zoning events in the solid state and based upon self-assembled coordination polymers: Summary of results

2019 Fall National Meeting

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