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Seo H.,Center for Electro Photo Behaviors in Advanced Molecular System | Jun M.E.,Center for Electro Photo Behaviors in Advanced Molecular System | Ranganathan K.,Center for Electro Photo Behaviors in Advanced Molecular System | Lee K.-H.,Pohang University of Science and Technology | And 4 more authors.
Organic Letters | Year: 2014

A novel approach to suppress the side reactions observed in the reaction-based gold-sensing systems based on the alkyne activation is disclosed. By elevating steric strain around the reaction site, the gold ion promoted ring-opening process in rhodamine-lactam probes is significantly accelerated, which also leads to suppression of those possible side reactions. As a result, the probes show very high sensitivity in addition to excellent selectivity toward gold species. Furthermore, bioimaging of gold species in live cells was demonstrated with a FRET version. © 2014 American Chemical Society.

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