Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Effect of Molecular Aggregation on the Photo-Induced Anisotropy in Amorphous Polymethacrylate Bearing an Aminonitroazobenzene Moiety

  • Published : 20010300
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Abstract

We investigated H-type molecular aggregation in a simply spin-coated amorphous homopolymer film of polymethacrylate containing push-pull azobenzene moieties. It was found that the aggregate formation was strongly influenced by thermal treatment an d that the aggregate created in the polymer film could be easily disrupted by irradiation of a linearly polarized light. In the first writing cycle of aggregated polymer film, photo-induced birefringence showed a steep increase to the highest value followed by a gradual decrease to the certain asymptotic value under longer irradiation of a linearly polarized light. This unique behavior could be attributed to the cooperative motion and the disruption of the aggregated molecules under continuous irradiation of light.

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References

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