摘要：

The reorientational relaxation process of the photochromic molecule 9-hydroxymethyl-10-[(naphthylmethoxy)methyl]anthracene (HNMA) was observed in glassy poly(methyl methacrylate) (PMMA). For this purpose, the intramolecular photodimerization of HNMA incorporated in a PMMA matrix was selectively induced by irradiation with linearly polarized light. The optical anisotropy created in this way in the sample was allowed to relax to equilibrium by annealing at different temperatures. The reorientational relaxation of HNMA associated with this thermal treatment was subsequently observed by monitoring the time dependence of the two dichroic absorbance components of the anthracene moieties of HNMA

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