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Electropolymerized Films of Macromeric Assemblies.

Toru Kajita1, Robert M. Leasure, Martin Devenney

  • 1Kenan Laboratories of Chemistry, The University of North Carolina at Chapel Hill, Venable Hall, CB# 3290, Chapel Hill, North Carolina 27599-3290.

Inorganic Chemistry
|October 24, 2001
PubMed
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New macromeric films of poly[Ru(II)(vbpy)(2)(4-CO(2)H-4'-CH(3)bpy)](2+) exhibit unique microporous structures and altered excited state lifetimes compared to conventional polymer films.

Area of Science:

  • Electrochemistry
  • Polymer Science
  • Materials Science
  • Photochemistry

Background:

  • Ruthenium(II) bipyridine complexes are widely studied for their photophysical and electrochemical properties.
  • Polymer-supported metal complexes offer advantages in device fabrication and stability.
  • Living anionic polymerization provides precise control over polymer architecture.

Purpose of the Study:

  • To synthesize and characterize a novel macromer based on poly[4-(2-aminoethyl)styrene] and a ruthenium(II) bipyridine complex.
  • To investigate the electropolymerization behavior and film properties of the synthesized macromer.
  • To compare the electrochemical and photophysical properties of macromeric films with conventional polymer films.

Main Methods:

Related Experiment Videos

  • Synthesis of poly[4-(2-aminoethyl)styrene] via living anionic polymerization.
  • Derivatization of the polymer with [Ru(II)(vbpy)(2)(4-CO(2)H-4 ombin-CH(3)bpy)](2+) via amide coupling.
  • Reductive electropolymerization of the macromer onto various electrode materials.
  • Characterization of film morphology, charge transfer, and excited state lifetimes.

    • Main Results:

    • Macromeric films displayed significantly rougher, locally microporous structures compared to conventional films.
    • Intrafilm charge transfer rates in macromeric films were comparable to conventional films.
    • Metal-to-ligand charge transfer (MLCT) excited state lifetimes were shortened in macromeric films, attributed to quenching by trap sites.

    Conclusions:

    • The synthesized macromer can be effectively electropolymerized to form stable films with unique structural properties.
    • The macromeric films exhibit distinct photophysical characteristics, including shorter excited state lifetimes, due to their structure.
    • Sequential polymerization allows for the preparation of stable mixed-polymer films with tunable properties.