嵌入二噻吩乙烯的扩展杯卟啉的门控光致变色
Gated Photochromism of Dithienylethene-Embedded Expanded Calixphyrins.
作者信息
Zhang Fenni, Rao Yutao, Zhou Mingbo, Xu Ling, Osuka Atsuhiro, Song Jianxin
机构信息
Key Laboratory of Chemical Biology and Traditional Chinese Medicine, Ministry of Educational of China, Key Laboratory of the Assembly and, Application of Organic Functional Molecules of Hunan Province, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, 410081, China.
出版信息
Chemistry. 2023 Nov 8;29(62):e202302340. doi: 10.1002/chem.202302340. Epub 2023 Sep 27.
Dithienylethene (DTE)-embedded expanded porphyrins were synthesized and confirmed to be photochemically inactive due to the lowest excited state of the expanded porphyrins. On the other hand, DTE-embedded expanded calixphyrins exhibited reversible photochromism upon UV-irradiation to form colored closed forms, which reverted to colorless open forms upon red-light irradiation. The closed forms were oxidized with DDQ or the air to lock the recorded information by converting to photochemically inactive expanded porphyrins. This was unlocked by reduction with NaBH to restore expanded calixphyrins with photochromism activity. These gated photochromic behaviors were demonstrated in PMMA (polymethyl methacrylate) film.
合成了嵌入二噻吩乙烯（DTE）的扩展卟啉，并证实由于扩展卟啉的最低激发态，其光化学惰性。另一方面，嵌入DTE的扩展杯卟啉在紫外线照射下表现出可逆的光致变色，形成有色的闭合形式，在红光照射下又恢复为无色的开放形式。通过用DDQ或空气氧化闭合形式，将其转化为光化学惰性的扩展卟啉，从而锁定记录的信息。通过用硼氢化钠还原可解锁此过程，以恢复具有光致变色活性的扩展杯卟啉。这些门控光致变色行为在聚甲基丙烯酸甲酯（PMMA）薄膜中得到了证明。
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