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Polarized light-induced orientation in azo-dyes covalently bonded to styrene copolymer (Azo PSCMS) was investigated by using polarized UV-VIS spectroscopy. It was found that thermal isomerization and photoisomerization was slower and a photoinduced dichroism was larger than azo-dyes doped in polystyrene. The covalent linkage to a polymer chain may suppress both the mobility required for the isomerization...
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