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Updated: Jul 2, 2026

Synthesis of Cyclic Polymers and Characterization of Their Diffusive Motion in the Melt State at the Single Molecule Level
Published on: September 26, 2016
cis-/trans-Specific Synthesis of Functionalized Bottlebrush Ring Opening Metathesis Polymerization Polymers
Kanticha Jaiyen1, Sirilak Mekcham1, Daisuke Shimoyama1
1Department of Chemistry, Tokyo Metropolitan University, 1-1 Minami Osawa, Hachioji, Tokyo 192-0397, Japan.
Abstract:
Z-Specific (99% cis) and E-specific (90% trans) syntheses of functionalized bottlebrush polymers (BBPs) by living ring opening metathesis polymerization (ROMP) of exo-N-substituted norbornene-2,3-dicarboximides (NDIs) containing terthiophene (3T) and pyrene (Pyr) moieties connected to a long methylene spacer (n-dodecyl) have been demonstrated by the (arylimido)-vanadium(V)-alkylidene catalysts in toluene at 50 °C. Thermal properties in the resultant BBPs measured by DSC thermograms are affected by the cis/trans selectivity; the resultant cis-BBPs containing 3T possessed a melting temperature at 111.2 °C, whereas the corresponding trans-BBPs are amorphous. The differences in cis-/trans-BBPs (containing 3T, Pyr) toward the emission properties have also been demonstrated due to a different degree in the inter/intra-polymer interaction through the functionality.
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