Journal
CHEMICAL COMMUNICATIONS
Volume 47, Issue 21, Pages 6087-6089Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c1cc10995b
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Cyclo[2]benzimidazole is a new host for anions that turns on its luminescence up to 150 fold upon binding. Photoexcited cyclo[2]benzimidazole undergoes an efficient non-radiative deactivation through an excited-state intramolecular proton-transfer (ESIPT) mechanism. Upon binding an anion, the ESIPT pathway is blocked, resulting in an increase in the luminescence efficiency.
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