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Synthesis and Reactivity of Metallocarbene-Containing Polymers
Breana J Wilson1, Johnathan N Brantley1
1Department of Chemistry , University of Tennessee , Knoxville , Tennessee 37996 , United States.
Journal of the American Chemical Society
|July 27, 2019
Summary
This study introduces novel Fischer carbene-containing polymers synthesized via ring-opening metathesis polymerization. These metallopolymers demonstrate excellent solubility and stability, offering new possibilities for functional materials.
Area of Science:
- Materials Science
- Polymer Chemistry
- Organometallic Chemistry
Background:
- Metallopolymers are versatile materials with applications in electronics, catalysis, and responsive systems.
- Incorporating metallocarbenes into polymer backbones remains an underexplored area.
- Existing methods have not fully leveraged the unique properties of metallocarbene moieties in polymer design.
Purpose of the Study:
- To develop a synthetic strategy for creating Fischer carbene-containing polymers.
- To investigate the properties and potential applications of these novel metallopolymers.
- To explore the reactivity and stimuli-responsive behavior of metallocarbene polymers.
Main Methods:
- Ring-opening metathesis polymerization (ROMP) was employed for polymer synthesis.
- Characterization of polymer properties including degree of polymerization, solubility, and thermal stability.
- Investigation of block copolymer formation and post-polymerization modification.
- Analysis of carbon monoxide release upon exposure to light or oxygen.
Main Results:
- Successful synthesis of Fischer carbene-containing polymers with high degrees of polymerization (>800 repeats).
- The resulting metallopolymers exhibit excellent solubility and thermal stability.
- Metallocarbene subunits were effectively incorporated into block copolymers and amenable to further modification.
- Unusual release of carbon monoxide from tungsten carbene polymers upon light or oxygen exposure was observed.
Conclusions:
- Ring-opening metathesis polymerization is an effective method for synthesizing Fischer carbene-containing polymers.
- These novel metallopolymers possess desirable properties like solubility and thermal stability.
- The stimuli-responsive carbon monoxide release offers unique functionalities for advanced material development.
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