Lithium cation catalyzed radical copolymerization of isobutylene with ethyl acrylate has been examined. Up to 30% of isobutylene is incorporated at 1 atm pressure, and molecular weights up to a million have been observed.
Regular two-dimensional covalent grids of monolayer thickness with molecular-size openings, reminiscent of a tennis net or chickenwire, will have many useful applications, among others as selective barrier materials and efficient passive or active separation membranes. We propose to synthesize a grid whose basic unit is Zn(II) porphyrin triply linked in the meso-meso, and both beta-beta positions four times by carbon-carbon bonds to each of its neighbors to form porphite sheets ...
Most mechanical machines contain rotating parts and it is likely that the nanomachines of the future will be no exception. We proposed to find out how rotors 1-2 nm in size can be synthesized and attached to surfaces, and what their fundamental properties are. We studied their equilibrium behavior and driven response, the effects of rotational barriers and friction, and mutual and environmental interactions with potential future applications in mind ...
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