UID:
(DE-602)edochu_18452_22784
Format:
1 Online-Ressource (5 Seiten)
Content:
Proton‐responsive photochromic molecules are attractive for their ability to react on non‐invasive rapid optical stimuli and the importance of protonation/deprotonation processes in various fields. Conventionally, their acidic/basic sites are on hetero‐atoms, which are orthogonal to the photo‐active π‐center. Here, we incorporate azulene, an acid‐sensitive pure hydrocarbon, into the skeleton of a diarylethene‐type photoswitch. The latter exhibits a novel proton‐gated negative photochromic ring‐closure and its optical response upon protonation in both open and closed forms is much more pronounced than those of diarylethene photoswitches with hetero‐atom based acidic/basic moieties. The unique behavior of the new photoswitch can be attributed to direct protonation on its π‐system, supported by 1H NMR and theoretical calculations. Our results demonstrate the great potential of integrating non‐alternant hydrocarbons into photochromic systems for the development of multi‐responsive molecular switches.
Content:
Peer Reviewed
In:
Weinheim : Wiley-VCH, 59,42, Seiten 18532-18536
Language:
English
DOI:
10.1002/anie.202007989
URN:
urn:nbn:de:kobv:11-110-18452/22784-0
URL:
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