Solvent tunable optical properties of a polymerized vinyl- and thienyl-substituted ionic liquid.
Thermal free radical polymerization of a self-assembled, bifunctional imidazolium-based ionic liquid (IL) monomer bearing both vinyl and thienyl groups is reported. FT-IR spectroscopy proves that the polymerization occurs through both the vinyl and thienyl groups. The polymer is resistant to swelling in water and common organic solvents. The as-synthesized polymer can be readily chemically doped and de-doped. Small-angle X-ray scattering studies indicate that the dried polymer adopts a weakly ordered lamellar structure. The p-doped, ethanol-solvated polymer undergoes a structural conversion to a nonlamellar phase. The absorption and photoluminescence spectra can be modulated in both the neutral (thiophene) and p-doped states depending on whether the polymer is dry or ethanol-solvated. The results demonstrate the possibility of incorporating solvent responsive optical characteristics in a {pi}-conjugated polymer.
- Research Organization:
- Argonne National Laboratory (ANL)
- Sponsoring Organization:
- SC
- DOE Contract Number:
- AC02-06CH11357
- OSTI ID:
- 1004044
- Report Number(s):
- ANL/MSD/JA-67781
- Journal Information:
- J. Phys. Chem. B, Journal Name: J. Phys. Chem. B Journal Issue: 45 ; Sep. 16, 2010 Vol. 114; ISSN 0022-3654
- Country of Publication:
- United States
- Language:
- ENGLISH
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