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Depolymerizable Olefinic Polymers Based on Fused-Ring Cyclooctene Monomers
Published on: December 16, 2022
Synthesis of polyyne rotaxanes
Levon D Movsisyan1, Dmitry V Kondratuk, Michael Franz
1Oxford University, Department of Chemistry, Chemistry Research Laboratory, Oxford OX1 3TA, UK.
Organic Letters
|June 20, 2012
Summary
Active-metal templating synthesized novel rotaxanes with polyyne chains. The study found that polyyne proximity quenches rhenium luminescence, offering new control over polyyne chain interactions.
Area of Science:
- Supramolecular Chemistry
- Coordination Chemistry
- Materials Science
Background:
- Rotaxanes are mechanically interlocked molecules with potential applications in molecular machines and materials.
- Polyyne chains are versatile building blocks in organic synthesis and materials science.
- Controlling the electronic and photophysical properties of polyynes is crucial for their applications.
Purpose of the Study:
- To synthesize novel rotaxanes using active-metal templating.
- To investigate the structural and photophysical properties of these rotaxanes.
- To explore the potential of these rotaxanes for controlling polyyne chain environments.
Main Methods:
- Active-metal templating synthesis of phenanthroline-based macrocycles threaded onto polyyne chains (C8, C12, C20).
- X-ray crystallography to determine the structure of the C12 rotaxane.
- Spectroscopic characterization of rhenium(I) carbonyl complexes of the rotaxanes.
Main Results:
- Successful synthesis of rotaxanes with varying polyyne chain lengths.
- Determination of the crystal structure of the C12 rotaxane, revealing close proximity between the macrocycle and the polyyne.
- Observation of luminescence quenching of rhenium in the rotaxane complex due to the adjacent polyyne chain.
Conclusions:
- Active-metal templating is an effective method for synthesizing polyyne-containing rotaxanes.
- The close proximity of the polyyne chain within the rotaxane structure influences the photophysical properties of coordinated metal centers.
- These rotaxanes provide a novel platform for modulating the environment and interactions of polyyne chains.
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