WebApr 25, 2024 · A monohydrated co-crystal (1H) of SA derivatives did not exhibit photochromism upon UV light irradiation. However, upon heating, 1H transformed to the anhydrous form 1A, which exhibited photochromism. Moreover, 1A re-hydrated to 1H under high humidity conditions, and the photochromic properties were switched off. Thus, the …
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