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Photo-induced polymerization in ionic liquid medium: 1. Preparation of polyaniline nanoparticles

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Abstract

Photo-induced polymerization is employed to prepare polyaniline (PAN) nanoparticles in ionic liquid for the first time. Photons and photoactive ionic liquid cations replace conventional oxidants and metal complexes to promote the polymerization of aniline monomer. The diameter of the resulted PAN is confirmed in nano-scale by SEM. With increase of protonic acid in medium, the yield of the PAN increased, the UV absorption of the PAN strengthened, and a blue shift of the π-polaron absorption was observed. And the conductivity of the PAN also increased with the acid content in medium. The potential mechanism of photo-induced polymerization of aniline is proposed. Moreover, after the ionic liquid is separated from the reaction mixture and reused for five times, no obvious decrease in catalytic activity could be found in photo-induced polymerization of aniline. The method may open a new pathway to prepare nano-scale conducting polymers with sunlight.

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Acknowledgments

This project is supported by the Research Project of Changsha Science and Technology (K0802123-11) and the Foundation of State Key Laboratory of Chemo/Biosensing and Chemometrics of Hunan University (200706). Thanks for the help of Professor Zhong Xie (Center of Physics Experiment, Hunan University).

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Authors and Affiliations

  1. State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, 410082, Changsha, People’s Republic of China

    Zhou Zhou, Deliang He, Yanni Guo, Zhengdan Cui, Liping Zeng, Guoxi Li & Ronghua Yang

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  1. Zhou Zhou
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  2. Deliang He
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  3. Yanni Guo
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  4. Zhengdan Cui
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  5. Liping Zeng
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  7. Ronghua Yang
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Correspondence to Deliang He or Ronghua Yang.

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Zhou, Z., He, D., Guo, Y. et al. Photo-induced polymerization in ionic liquid medium: 1. Preparation of polyaniline nanoparticles. Polym. Bull. 62, 573–580 (2009). https://doi.org/10.1007/s00289-009-0038-y

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  • DOI: https://doi.org/10.1007/s00289-009-0038-y

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