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A luminescent cocrystal system is reported to undergo crystal‐to‐crystal phase transformation from yellow‐emitting polymorph I to green‐emitting polymorph II, triggered by THF fuming or heating, and the green emission can recover to the initial yellow emission by grinding. The established spectroscopic and crystallographic analyses demonstrate that the phase transition occurred and benefits from the...
Die Kristall‐zu‐Kristall‐Phasenumwandlung organischer Kokristalle unter verschiedenen externen Stimuli – wie Lösungsmitteldampf und Erwärmen – wird von einer reversiblen Lumineszenzänderung begleitet, wie B. Xu et al. in ihrer Zuschrift auf S. 15210 demonstrieren. Die Ergebnisse zeigen, dass die Lumineszenzänderung auf die einzigartige Umlagerung einer durch Wasserstoff‐/Halogenbrücken erzeugten Stapelung...
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