Journal
ORGANIC LETTERS
Volume 16, Issue 5, Pages 1374-1377Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ol5001389
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Funding
- EPB center through the National Research Foundation, Korea [R11-2008-052-01001]
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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.
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