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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 22, Number 3
BKCSDE 22(3)
March 20, 2001

Title	Effect of Molecular Aggregation on the Photo-Induced Anisotropy in Amorphous　Polymethacrylate Bearing an Aminonitroazobenzene Moiety
Author	Beom Jun Kim, Soo Young Park, Dong Hoon Choi
Keywords	Molecular aggregation, Linearly polarized light, Photo-induced birefringence.
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 and 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.
Page	271 - 275
Full Text	PDF

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