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  • Title: Synthesis and characterization of coumarin-based spiropyran photochromic colorants.
    Author: Chen JR, Wong JB, Kuo PY, Yang DY.
    Journal: Org Lett; 2008 Nov 06; 10(21):4823-6. PubMed ID: 18826232.
    Abstract:
    Two coumarin-based spiropyran derivatives were synthesized and characterized in two steps to explore their photochromic properties. Both prepared compounds are sensitive to UV light and change colors upon irradiation. The resulting photogenerated zwitterions revert to the original compounds while being heated. A new family of organic photochromic colorants is introduced.
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