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A linear molecular architecture equipped with complementary three‐fold hydrogen‐bonding units embedded with a photoswitchable trans‐tetrafluoroazobenzene moiety was synthesized. The transto cis photoisomerism of the azobenzene unit induced drastic changes in the molecular architecture as a result of intramolecular hydrogen bonding as evidenced by NMR spectroscopy and size exclusion chromatography...
Intelligente photoschaltbare Foldamere, die ausschließlich aus Azobenzol‐Einheiten bestehen, nehmen im Dunkeln stabile helicale Formen an. Sie lassen sich durch UV‐Strahlung leicht und reversibel entfalten, erkennbar durch verschwindende Circulardichroismus‐Signale (siehe Bild). Die Variation der Oligomerlänge führt zur Optimierung der Effizienz und damit zu quantitativem lichtinduziertem Entfalten...
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