Non‐destructive readout of an image using IR light on a polymer film containing a photochromic diarylethene was successively carried out. 1,2‐Bis(2‐methyl‐6‐phenyl‐1‐benzothiophen‐3‐yl)hexafluorocyclopentene was found to exhibit a remarkable IR spectral change around 1590 cm–1 upon photoirradiation, as demonstrated in the Figure.
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Uchida et al. (2003) studied this question.
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