Details

Autor(en) / Beteiligte

• Zhang, Fenni
• Rao, Yutao
• Zhou, Mingbo
• Xu, Ling
• Osuka, Atsuhiro
• Song, Jianxin

Titel

Gated Photochromism of Dithienylethene‐Embedded Expanded Calixphyrins

Ist Teil von

• Chemistry : a European journal, 2023-11, Vol.29 (62), p.e202302340-n/a

Ort / Verlag

Weinheim: Wiley Subscription Services, Inc

Erscheinungsjahr

2023

Quelle

Wiley Online Library

Beschreibungen/Notizen

• 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 NaBH4 to restore expanded calixphyrins with photochromism activity. These gated photochromic behaviors were demonstrated in PMMA (polymethyl methacrylate) film. DTE‐embedded expanded calixphyrins exhibit reversible photochromism. The closed forms of these porphyrinoids are oxidized with DDQ to lock the recorded information by converting to photochemically inactive expanded porphyrins, which can be reduced with NaBH4 to restore the photochromism activity. This gated photochromic behavior was demonstrated in PMMA film.