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Synthesis of Cyclic Polymers and Characterization of Their Diffusive Motion in the Melt State at the Single Molecule Level
Published on: September 26, 2016
Synthesis of shape-persistent macrocycles with three 1,8-diazaanthracene units and their packing in the single
Ming Li1, Frank-Gerrit Klärner, Junji Sakamoto
1Laboratory for Polymer Chemistry, Department of Materials, ETH Zurich, HCI J541, Wolfgang-Pauli-Strasse 10, 8093 Zürich (Switzerland).
Abstract:
The synthesis of four shape-persistent macrocycles with three 1,8-diazaanthracene units each is reported (2,3 a-3 c). For two of them single crystals could be obtained and the structures in the crystal be solved. The structures reveal that macrocycle 2 self-dimerizes in the solid state; surprisingly it also forms a stable dimer in solution. The reason for this is seen in unusually efficient dispersion interactions as a consequence of the large contact areas in the dimer. All macrocycles are assessed as to their applicability in lateral polymerizations in the single crystal as well as in solution.
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